1/16
MSM6546/6546L
Semiconductor
GENERAL DESCRIPTION
MSM6546/6546L is a 4-bit, low-power microcontroller manufactured in a CMOS silicon gate
process. The microcontroller can be initialized and operated at the low supply voltage of 0.9 V.
This device contains a crystal oscillator circuit, voltage converter circuits, a time base counter,
a ROM, a RAM, a stack RAM, I/O ports, interrupt function components, a serial I/O port, a
buzzer output circuit, an up/down counter, and LCD drivers.
This IC can be driven by one battery and is well suited to products that need to be operated
with low power consumption.
FEATURES
The IC can be initialized and operated even at a low voltage of 0.9 V.
Low power consumption
ROM
: 4096 words 17 bits
RAM
: 256 words 4 bits
I/O port
Input/output port
: 7 ports 4 bits
Input port
: 1 port 4 bits
Interrupt functions (real-time interrupt, external interrupt, and serial interrupt)
Serial I/O port
: 8-bit sync communication
Buzzer output circuit
4-bit decimal up/down counter
54 LCD drivers (up to 200 segments can be displayed)
75 instructions
Minimum instruction execution time : 61 ms
Operation under single 1.5 V power supply (MSM6546)
A mask option allows the 3 V power supply to be used (MSM6546L).
Built-in 32.768 kHz crystal oscillator circuit
Package:
100-pin plastic QFP (QFP100-P-1420-0.65-BK)
: (Product name : MSM6546-xxGS-BK, MSM6546L-xxGS-BK)
Chip
indicates a code number.
Semiconductor
MSM6546/6546L
Operatable at 0.9 V and Built-in LCD Driver 4-Bit Microcontroller
E2E0020-38-95
This version: Sep. 1998
Previous version: Mar. 1996
2/16
MSM6546/6546L
Semiconductor
BLOCK DIAGRAM
P7.3
P7.2
P7.1
P7.0
P6.3
P6.2
P6.1
P6.0
P5.3
P5.2
P5.1
P5.0
P4.3
P4.2
P4.1
P4.0
P3.3
P3.2
P3.1
P3.0
P2.3
P2.2
P2.1
P2.0
P1.3
P1.2
P1.1
P1.0
P0.3
P0.2
P0.1
P0.0
XT
XTB
PORT7
PORT6
PORT5
PORT4
PORT3
PORT2
PORT1
PORT0
OSC
TMOUT
TIME BASE
COUNTER
SYSTEM CLOCK
GENERATOR
CCLK
BU/D
4-Bit BCD COUNTER
CCNT
PGCONH
PGCONL
SIN
SOUT
SCKL
MODE
PCZIOX
PCHZX0
PCIOX0
PCHZ0
PCIO0
SCND0
SCND1
SERIAL I/O
SBFFL
SBFFH
D-BUS
EIF
E
IRT
I
RQRT
FIEX
I
RQEX
PNEX
IRQSIO
PRIO
INTERRUPT CONTROL
RAM
(256
4 bits)
PAGE
WORK
ADRS
PROGRAM ROM
4096
17 bits
INSTRUCTION
REGISTER
INSTRUCTION
DECODER
STACK RAM
PROGRAM
COUNTER
ADDER
FRMT
FLAG
S-bus
ACC
A-bus
ALU
MPX
TEMPO
BUZZER
MDTH
MDTL
VOLTAGE
REGULATOR
BD
V
DD
V
SS1
V
SS2
V
EE
V
CP
V
CM
LCDCNT
LCD DRIVER
SEG0
SEG53
V
SS3
3/16
MSM6546/6546L
Semiconductor
PIN CONFIGURATION (TOP VIEW)
50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TEST2
TEST3
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
P7.3/CCLK
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
P5.1
P5.2
P5.3
BD
V
EE
V
SS3
V
SS2
V
CP
V
CM
V
SS1
V
DD
XT
XTB
P6.0
P6.1
P6.2
P6.3/
SCLK
P7.0/SOUT
P7.1/SIN
P7.2/BU/D
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
P0.1
P0.0
SEG53
SEG52
SEG51
SEG50
SEG49
SEG48
SEG47
SEG46
SEG45
SEG44
SEG43
SEG42
SEG41
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
P5.0
P0.2
P0.3
P1.0
P1.1
P1.2
P1.3
P2.0
P2.1
P2.2
P2.3
P3.0
P3.1
P3.2
P3.3
P4.0
P4.1
P4.2
P4.3
RESET
TEST1
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
100-Pin Plastic QFP
4/16
MSM6546/6546L
Semiconductor
PIN DESCRIPTIONS
Symbol
Type
Description
PORT0
(P0.0 to P0.3)
I/O
4-bit input-output port, I/O switchable, with/without input pull-down resistor
I/O
4-bit input-output port, I/O switchable, with/without input pull-down resistor
I/O
4-bit input-output port, I/O switchable,
with/without input pull-down resistor
I/O
4-bit input-output port, I/O switchable, with/without input pull-down resistor
I/O
4-bit input-output port, I/O switchable, with/without input pull-down resistor
I/O
4-bit input-output port, I/O switchable, with/without input pull-down resistor
I/O
4-bit input-output port, I/O switchable,
with/without input pull-down resistor
4-bit input port
Tie to the negative pole of the battery when
not used.
BD
O
Buzzer output pin
RESET
I
Reset pin with input pull-down resistor
TEST1
Testing pins with input pull-down resistor;
Tie to the negative pole of the battery.
TEST2
I
TEST3
XT
I
Connection pins for crystal oscillator
XTB
O
V
DD
--
0 V power supply pin
V
SS1
--
1.5 V supply pin (power supply pin for 1.5 V operation)
V
SS2
--
3.0 V supply pin (power supply pin for 3.0 V operation)
V
CP
--
Connection pins for internal potential development capacitor
V
CM
PORT1
(P1.1 to P1.3)
PORT2
(P2.0 to P2.3)
PORT3
(P3.0 to P3.3)
PORT4
(P4.0 to P4.3)
PORT5
(P5.0 to P5.3)
PORT6
(P6.0 to P6.3)
P2.0 to P2.3
External interrupt
port
P6.3: SCLK
Shared with serial
port
I
PORT7
(P7.0 to P7.3)
P7.0: SOUT
P7.1: SIN
P7.2: BU/D
Shared with 4-bit
up/down counter
P7.3: CCLK
V
EE
--
Supply pin for internal logic (constant voltage circuit output pin)
V
SS3
--
4.5 V supply pin
SEG0 to SEG53
O
LCD driver
5/16
MSM6546/6546L
Semiconductor
ABSOLUTE MAXIMUM RATINGS (MSM6546, 1.5 V, BUF = "0")
Parameter
Symbol
Condition
Rating
Unit
Power Supply Voltage (1)
V
SS1
Ta = 25C
4.0 to +0.3
Power Supply Voltage (2)
V
SS2
7.0 to +0.3
V
Power Supply Voltage (3)
V
SS3
7.0 to +0.3
Input Voltage
V
IN
V
SS1
0.3 to +0.3
Output Voltage (1) *1, *2
V
O1
V
SS1
0.3 to +0.3
Output Voltage (2) *2
V
O2
V
SS2
0.3 to +0.3
Output Voltage (3) *2
V
O3
V
SS3
0.3 to +0.3
Storage Temperature
T
STG
--
55 to +125
C
*1 Normal output
*2 LCD driver output
Note: The input of the constant voltage circuit is equal to the output of the voltage converter
(V
SS2
).
Note: The input of the constant voltage circuit is equal to the output of the voltage converter
(V
SS2
).
RECOMMENDED OPERATING CONDITIONS (MSM6546, 1.5 V, BUF = "0")
Parameter
Symbol
Condition
Range
Unit
Operating Voltage
V
op
--
1.75 to 0.9
V
V
--
Operating Temperature
T
op
20 to +70
C
--
Oscillation Frequency
f
OSC
32.768
kHz
--
V
DD
= 0 V (V
SS1
= battery voltage)
6/16
MSM6546/6546L
Semiconductor
ELECTRICAL CHARACTERISTICS (MSM6546, 1.5 V, BUF = "0")
Parameter
Symbol
Condition
Min.
Applied Pin
Typ. Max. Unit
Power Supply Current
I
DD
*1
--
--
3
--
mA
Oscillation Start Voltage
V
OSC
Within 2 seconds
--
V
SS1
--
0.9
V
Output Current 1
I
OH1
V
O
= 0.5 V
150
PORT0 to PORT6*2
SOUT, SCLK
--
--
mA
I
OL1
V
O
= 1.0 V
150
--
--
Output Current 2
I
OH2
V
O
= 0.5 V
20
BD
--
--
mA
I
OL2
V
O
= 1.0 V
20
--
--
Input Current 1
I
IH1
V
I
= 0 V, in the input state,
with pull-down resistor
7
PORT0 to
PORT6 *2
15
30
mA
Input Leakage Current
I
IL
V
I
= 0 V, 1.5 V, in the input state,
without pull-down resistor
--
PORT0 to PORT7*2
SIN, SOUT, SCLK
--
1
mA
Input Current 3
I
IH3
V
I
= 0 V, with pull-down
resistor
70
RESET
TEST1 to TEST3
250
500
mA
Input Voltage
V
IH
--
--
All input pins
--
0.3
V
V
IL
1.2
--
--
(V
DD
= 0 V, V
SS1
= 1.5 V (battery voltage) , V
SS2
= 3.0 V, V
SS3
= 4.5 V, f
OSC
= 32.768 kHz, C
X
= 35 pF, Ta = 25C)
I
OH3
V
OH
= 0.2 V
4
--
--
I
OMH3
V
OMH
= V
SS1
0.2 V
4
--
--
Output Current 3
(Common Segment Output)
SEG0 to
SEG53
mA
I
OML3
V
OML
= V
SS2
0.2 V
4
--
--
I
OL3
V
OL
= 4.3 V
4
--
--
*1 Depends on program. (Values in the above table are applied in the case where the software
duty is about 5%.)
*2 PORT0 = P0.0 to P0.3, PORT1 = P1.0 to P1.3, PORT2 = P2.0 to P2.3, PORT3 = P3.0 to P3.3,
PORT4 = P4.0 to P4.3, PORT5 = P5.0 to P5.3, PORT6 = P6.0 to P6.3, PORT7 = P7.0 to P7.3
Note: The input of the constant voltage circuit is equal to the output of the voltage converter
(V
SS2
).
7/16
MSM6546/6546L
Semiconductor
ABSOLUTE MAXIMUM RATINGS (MSM6546, 1.5 V, BUF = "1")
Parameter
Symbol
Condition
Rating
Unit
Power Supply Voltage (1)
V
SS1
Ta = 25C
4.0 to +0.3
Power Supply Voltage (2)
V
SS2
7.0 to +0.3
V
Power Supply Voltage (3)
V
SS3
7.0 to +0.3
Input Voltage
V
IN
V
SS1
0.3 to +0.3
Output Voltage (1) *1, *2
V
O1
V
SS1
0.3 to +0.3
Output Voltage (2) *2
V
O2
V
SS2
0.3 to +0.3
Output Voltage (3) *2
V
O3
V
SS3
0.3 to +0.3
Storage Temperature
T
STG
--
55 to +125
C
*1 Normal output
*2 LCD driver output
Parameter
Symbol
Condition
Range
Unit
Operating Voltage
V
op
--
1.75 to 0.9
V
V
--
Operating Temperature
T
op
20 to +70
C
--
Oscillation Frequency
f
OSC
32.768
kHz
--
V
DD
= 0 V (V
SS1
= battery voltage)
RECOMMENDED OPERATING CONDITIONS (MSM6546, 1.5 V, BUF = "1")
Note: The input of the constant voltage circuit is directly connected to the power supply (V
SS1
).
Note: The input of the constant voltage circuit is directly connected to the power supply (V
SS1
).
8/16
MSM6546/6546L
Semiconductor
ELECTRICAL CHARACTERISTICS (MSM6546, 1.5 V, BUF = "1")
Parameter
Symbol
Condition
Min.
Applied Pin
Typ. Max. Unit
Power Supply Current
I
DD
*1
--
--
1.5
--
mA
Oscillation Start Voltage
V
OSC
Within 2 seconds
--
V
SS1
--
0.9
V
Output Current 1
I
OH1
V
O
= 0.5 V
150
PORT0 to PORT6*2
SOUT, SCLK
--
--
mA
I
OL1
V
O
= 1.0 V
150
--
--
Output Current 2
I
OH2
V
O
= 0.5 V
20
BD
--
--
mA
I
OL2
V
O
= 1.0 V
20
--
--
Input Current 1
I
IH1
V
I
= 0 V, in the input state,
with pull-down resistor
7
PORT0 to
PORT6 *2
15
30
mA
Input Leakage Current
I
IL
V
I
= 0 V, 1.5 V, in the input state,
without pull-down resistor
--
PORT0 to PORT7*2
SIN, SOUT, SCLK
--
1
mA
Input Current 3
I
IH3
V
I
= 0 V, with pull-down
resistor
70
RESET
TEST1 to TEST3
250
500
mA
Input Voltage
V
IH
--
--
All input pins
--
0.3
V
V
IL
1.2
--
--
(V
DD
= 0 V, V
SS1
= 1.5 V (battery voltage) , V
SS2
= 3.0 V, V
SS3
= 4.5 V, f
OSC
= 32.768 kHz, C
X
= 35 pF, Ta = 25C)
I
OH3
V
OH
= 0.2 V
4
--
--
I
OMH3
V
OMH
= V
SS1
0.2 V
4
--
--
Output Current 3
(Common Segment Output)
SEG0 to
SEG53
mA
I
OML3
V
OML
= V
SS2
0.2 V
4
--
--
I
OL3
V
OL
= 4.3 V
4
--
--
*1 Depends on program. (Values in the above table are applied in the case where the software
duty is about 5%.)
*2 PORT0 = P0.0 to P0.3, PORT1 = P1.0 to P1.3, PORT2 = P2.0 to P2.3, PORT3 = P3.0 to P3.3,
PORT4 = P4.0 to P4.3, PORT5 = P5.0 to P5.3, PORT6 = P6.0 to P6.3, PORT7 = P7.0 to P7.3
Note: The input of the constant voltage circuit is directly connected to the power supply (V
SS1
).
9/16
MSM6546/6546L
Semiconductor
ABSOLUTE MAXIMUM RATINGS (MSM6546L, 3.0 V, BUF = "0")
Parameter
Symbol
Condition
Rating
Unit
Power Supply Voltage (1)
V
SS1
Ta = 25C
4.0 to +0.3
Power Supply Voltage (2)
V
SS2
7.0 to +0.3
V
Power Supply Voltage (3)
V
SS3
7.0 to +0.3
Input Voltage
V
IN
V
SS2
0.3 to +0.3
Output Voltage (1) *2
V
O1
V
SS1
0.3 to +0.3
Output Voltage (2) *1, *2
V
O2
V
SS2
0.3 to +0.3
Output Voltage (3) *2
V
O3
V
SS3
0.3 to +0.3
Storage Temperature
T
STG
--
55 to +125
C
*1 Normal output
*2 LCD driver output
Note: The input of the constant voltage circuit is equal to the output of the voltage converter
(V
SS1
).
RECOMMENDED OPERATING CONDITIONS (MSM6546L, 3.0 V, BUF = "0")
Parameter
Symbol
Condition
Range
Unit
Operating Voltage
V
op
--
3.5 to 1.8
V
V
--
Operating Temperature
T
op
20 to +70
C
--
Oscillation Frequency
f
OSC
32.768
kHz
--
V
DD
= 0 V (V
SS1
= battery voltage)
Note: The input of the constant voltage circuit is equal to the output of the voltage converter
(V
SS1
).
10/16
MSM6546/6546L
Semiconductor
ELECTRICAL CHARACTERISTICS (MSM6546L, 3.0 V, BUF = "0")
Parameter
Symbol
Condition
Min.
Applied Pin
Typ. Max. Unit
Power Supply Current
I
DD
*1
--
--
0.75
--
mA
Oscillation Start Voltage
V
OSC
Within 2 seconds
--
V
SS2
--
1.8
V
Output Current 1
I
OH1
V
O
= 0.5 V
500
PORT0 to PORT6*2
SOUT, SCLK
--
--
mA
I
OL1
V
O
= 2.5 V
500
--
--
Output Current 2
I
OH2
V
O
= 0.5 V
20
BD
--
--
mA
I
OL2
V
O
= 2.5 V
20
--
--
Input Current 1
I
IH1
V
I
= 0 V, in the input state,
with pull-down resistor
50
PORT0 to
PORT6 *2
100
200
mA
Input Leakage Current
I
IL
V
I
= 0 V, 3 V, in the input state,
without pull-down resistor
--
PORT0 to PORT7*2
SIN, SOUT, SCLK
--
1
mA
Input Current 3
I
IH3
V
I
= 0 V, with pull-down
resistor
200
RESET
TEST1 to TEST3
750 1500
mA
Input Voltage
V
IH
--
--
All input pins
--
0.5
V
V
IL
2.5
--
--
(V
DD
= 0 V, V
SS1
= 1.5 V, V
SS2
= 3.0 V (battery voltage), V
SS3
= 4.5 V, f
OSC
= 32.768 kHz, C
X
= 35 pF, Ta = 25C)
I
OH3
V
OH
= 0.2 V
4
--
--
I
OMH3
V
OMH
= V
SS1
0.2 V
4
--
--
Output Current 3
(Common Segment Output)
SEG0 to
SEG53
mA
I
OML3
V
OML
= V
SS2
0.2 V
4
--
--
I
OL3
V
OL
= 4.3 V
4
--
--
*1 Depends on program. (Values in the above table are applied in the case where the software
duty is about 5%.)
*2 PORT0 = P0.0 to P0.3, PORT1 = P1.0 to P1.3, PORT2 = P2.0 to P2.3, PORT3 = P3.0 to P3.3,
PORT4 = P4.0 to P4.3, PORT5 = P5.0 to P5.3, PORT6 = P6.0 to P6.3, PORT7 = P7.0 to P7.3
Note: The input of the constant voltage circuit is equal to the output of the voltage converter
(V
SS2
).
11/16
MSM6546/6546L
Semiconductor
ABSOLUTE MAXIMUM RATINGS (MSM6546L, 3.0 V, BUF = "1")
Parameter
Symbol
Condition
Rating
Unit
Power Supply Voltage (1)
V
SS1
Ta = 25C
4.0 to +0.3
Power Supply Voltage (2)
V
SS2
7.0 to +0.3
V
Power Supply Voltage (3)
V
SS3
7.0 to +0.3
Input Voltage
V
IN
V
SS2
0.3 to +0.3
Output Voltage (1) *2
V
O1
V
SS1
0.3 to +0.3
Output Voltage (2) *1, *2
V
O2
V
SS2
0.3 to +0.3
Output Voltage (3) *2
V
O3
V
SS3
0.3 to +0.3
Storage Temperature
T
STG
--
55 to +125
C
*1 Normal output
*2 LCD driver output
Note: The input of the constant voltage circuit is directly connected to the power supply (V
SS2
).
RECOMMENDED OPERATING CONDITIONS (MSM6546L, 3.0 V, BUF = "1")
Parameter
Symbol
Condition
Range
Unit
Operating Voltage
V
op
--
3.5 to 0.9
V
V
--
Operating Temperature
T
op
20 to +70
C
--
Oscillation Frequency
f
OSC
32.768
kHz
--
V
DD
= 0 V (V
SS2
= battery voltage)
Note: The input of the constant voltage circuit is directly connected to the power supply (V
SS2
).
12/16
MSM6546/6546L
Semiconductor
ELECTRICAL CHARACTERISTICS (MSM6546L, 3.0 V, BUF = "1")
Parameter
Symbol
Condition
Min.
Applied Pin
Typ. Max. Unit
Power Supply Current
I
DD
*1
--
--
1.5
--
mA
Oscillation Start Voltage
V
OSC
Within 2 seconds
--
V
SS2
--
0.9
V
Output Current 1
I
OH1
V
O
= 0.5 V
500
PORT0 to PORT6*2
SOUT, SCLK
--
--
mA
I
OL1
V
O
= 2.5 V
500
--
--
Output Current 2
I
OH2
V
O
= 0.5 V
20
BD
--
--
mA
I
OL2
V
O
= 2.5 V
20
--
--
Input Current 1
I
IH1
V
I
= 0 V, in the input state,
with pull-down resistor
50
PORT0 to
PORT6 *2
100
200
mA
Input Leakage Current
I
IL
V
I
= 0 V, 3 V, in the input state,
without pull-down resistor
--
PORT0 to PORT7*2
SIN, SOUT, SCLK
--
1
mA
Input Current 3
I
IH3
V
I
= 0 V, with pull-down
resistor
200
RESET
TEST1 to TEST3
750 1500
mA
Input Voltage
V
IH
--
--
All input pins
--
0.5
V
V
IL
2.5
--
--
(V
DD
= 0 V, V
SS1
= 1.5 V, V
SS2
= 3.0 V (battery voltage), V
SS3
= 4.5 V, f
OSC
= 32.768 kHz, C
X
= 35 pF, Ta = 25C)
I
OH3
V
OH
= 0.2 V
4
--
--
I
OMH3
V
OMH
= V
SS1
0.2 V
4
--
--
Output Current 3
(Common Segment Output)
SEG0 to
SEG53
mA
I
OML3
V
OML
= V
SS2
0.2 V
4
--
--
I
OL3
V
OL
= 4.3 V
4
--
--
*1 Depends on program. (Values in the above table are applied in the case where the software
duty is about 5%.)
*2 PORT0 = P0.0 to P0.3, PORT1 = P1.0 to P1.3, PORT2 = P2.0 to P2.3, PORT3 = P3.0 to P3.3,
PORT4 = P4.0 to P4.3, PORT5 = P5.0 to P5.3, PORT6 = P6.0 to P6.3, PORT7 = P7.0 to P7.3
Note: The input of the constant voltage circuit is directly connected to the power supply (V
SS2
).
13/16
MSM6546/6546L
Semiconductor
NOTES ON USE
Power Supply for 0.9 V Microcontroller Series (Backup Flag and Constant-Voltage Circuit)
The 0.9 V microcontroller devices have a built-in constant-voltage circuit. The output of this
constant-voltage circuit powers the microcontroller's internal logic circuits. Setting a backup
flag (BUF) allows the input of the constant-voltage circuit to be switched to either the battery
or the output generated in the voltage converter, based on the battery voltage. A battery voltage
of 1.5 V or 3.0 V can be selected.
The output (V
EE
) of the constant-voltage circuit is set at approximately 1.3 V. This allows the
current consumed by the internal logic to be limited, irrespective of the battery voltage.
However, if the input of the constant voltage circuit is below this set value (approximately 1.3
V), the output (V
EE
) is equal to the input. The 0.9 V microcontroller can be operated even if the
internal voltage (output from the constant voltage circuit) falls to 0.9 V. Setting the backup flag
allows a larger operating voltage margin despite changes in internal voltage due to noise. For
example, for the 1.5 V specification, setting the backup flag to "0" causes twice the battery
voltage to enter the constant-voltage circuit. Thus, even if the battery voltage falls to 0.9 V, the
output voltage (V
EE
) is maintained at 1.3 V to allow a larger margin of operating voltage for
the internal logic circuits, because 1.8 V is applied to the input of the constant-voltage circuit.
Figures 1 to 4 show the internal status depending on the backup flag settings for the battery, as
well as status features.
XTAL
V
DD
(0 V)
V
SS1
(1.5 V)
V
SS2
(3.0 V)
V
SS3
*
(4.5 V)
V
EE
(About 1.3 V)
LCD driver*
Voltage
converter
Backup flag
(BUF)
Constant voltage circuit
VR
Internal logic
XT
XTB
*The V
SS3
pin is provided for the devices that contain an
LCD driver.
14/16
MSM6546/6546L
Semiconductor
(Figure 1) 1.5 V Operation (Backup Flag = "1")
(Figure 2) 1.5 V Operation (Backup Flag = "0")
(Figure 3) 3.0 V Operation (Backup Flag = "1")
Voltage converter
VR
Internal logic
V
DD
= 0 V
V
B
= 3.0 V
(1.5 V)
V
EE
V
DD
V
SS1
V
SS2
Voltage
doubler
Internal
status
Operating
range
Current
consumption
Feature
The battery level V
SS2
is applied to the input of the
constant voltage circuit.
0.9 to 3.5 V
1.5 mA*
When the battery level is powered down, the internal
circuit is powered directly by the battery.
* When the software duty is about 5%
Voltage converter
VR
Internal logic
V
DD
= 0 V
V
B
= 1.5 V
(3.0 V)
V
EE
V
DD
V
SS1
V
SS2
Voltage
doubler
Internal
status
Operating
range
Current
consumption
Feature
The battery level V
SS1
is applied to the input of the
constant voltage circuit.
0.9 to 1.75 V
1.5 mA*
When the battery level is powered down, the internal
circuit is powered directly by the battery.
* When the software duty is about 5%
Voltage converter
VR
Internal logic
V
DD
= 0 V
V
B
= 1.5 V
(3.0 V)
V
EE
V
DD
V
SS1
V
SS2
Voltage
doubler
Internal
status
Operating
range
Current
consumption
Feature
A doubled level of V
SS2
is applied to the input of the
constant voltage circuit.
0.9 to 1.75 V
3 mA*
When the battery level is powered down, a larger
operating voltage margin is gained, compared to the
case of Figure 1.
* When the software duty is about 5%
15/16
MSM6546/6546L
Semiconductor
(Figure 4) 3.0 V Operation (Backup Flag = "0")
Voltage converter
VR
Internal logic
V
DD
= 0 V
V
B
= 3.0 V
(1.5 V)
V
EE
V
DD
V
SS1
V
SS2
Voltage
rise
Internal
status
Operating
range
Current
consumption
Feature
A doubled level of V
SS1
is applied to the input of the
constant voltage circuit.
1.8 to 3.5 V
0.75 mA*
When the battery level is powered down, a smaller
operating voltage margin is gained, compared to the
case of Figure 3.
* When the software duty is about 5%
16/16
MSM6546/6546L
Semiconductor
(Unit : mm)
Notes for Mounting the Surface Mount Type Package
The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which
are very susceptible to heat in reflow mounting and humidity absorbed in storage.
Therefore, before you perform reflow mounting, contact Oki's responsible sales person for the
product name, package name, pin number, package code and desired mounting conditions
(reflow method, temperature and times).
QFP100-P-1420-0.65-BK
Package material
Lead frame material
Pin treatment
Solder plate thickness
Package weight (g)
Epoxy resin
42 alloy
Solder plating
5 mm or more
1.29 TYP.
Mirror finish
PACKAGE DIMENSIONS
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