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2002 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com
October 2002
A
CE1502 Pr
oduct F
a
mil
y
Arithmetic Contr
oller Engine (A
CExTM) f
or Lo
w P
o
wer Applications
ACE1502 Product Family Rev. 1.7
ACE1502 Product Family
Arithmetic Controller Engine (ACExTM)
for Low Power Applications
General Description
The ACE1502 (Arithmetic Controller Engine) family of microcon-
trollers is a dedicated programmable monolithic integrated circuit
for applications requiring high performance, low power, and small
size. It is a fully static part fabricated using CMOS technology.
The ACE1502 product family has an 8-bit microcontroller core,
64 bytes of RAM, 64 bytes of data EEPROM and 2K bytes of
code EEPROM. Its on-chip peripherals include a multifunction
16-bit timer, a watchdog/idle timer, and programmable under-
voltage detection circuitry. On-chip clock and reset functions
reduce the number of required external components. The
ACE1502 product family is available in 8- and 14-pin SOIC,
TSSOP and DIP packages.
Features
I
Arithmetic Controller Engine
I
2K bytes on-board code EEPROM
I
64 bytes data EEPROM
I
64 bytes RAM
I
Watchdog
I
Multi-input wake-up on all eight general purpose I/O pins
I
16-bit multifunction timer with difference capture
I
Hardware BitCoder (HBC)
I
On-chip oscillator
-- No external components
-- 1s instruction cycle time +/-2% accuracy
I
Instruction set geared for block encryption
I
On-chip Power-on Reset
I
Programmable read and write disable functions
I
Memory mapped I/O
I
32-level Low Voltage Detection
I
Brown-out Reset
I
Software selectable I/O option
-- Push-pull outputs with tri-state option
-- Weak pull-up or high impedance inputs
I
Fully static CMOS
-- Low power HALT mode (100nA @ 2.7V)
-- Power saving IDLE mode
I
Single supply operation
-- 1.8-3.6V
I
40 years data retention
I
1.8V data EEPROM min writing voltage
I
1,000,000 data changes
I
8- and 14-pin SOIC, TSSOP and DIP packages
I
In-circuit programming
Block and Connection Diagram
1. 100nf Decoupling capacitor recommended
2. Available only in the 14-pin package option
VCC
1
Power-on Reset
Brown-out Reset/Low
Battery Detect
Programming Interface
2K bytes of Code
EEPROM
64 bytes of Data
EEPROM
64 bytes of RAM
12-bit Timer0 with
Watchdog Timer
16-bit Multi-function
Timer1 with Difference
Capture
HALT & IDLE Power
Saving Modes
GPORT
general
purpose
I/O with
multi-
input
wakeup
Internal Oscillator
GND
1
RESET
2
(CKO) G0
(CKI) G1
G4
G6
2
G7
2
G3
Hardware Bit-Coder
(T1/TX) G2
(TX) G5
ACE1502 core
(4 interrupt
sources
and vectors)
2
www.fairchildsemi.com
ACE1502 Product Family Rev. 1.7
A
CE1502 Pr
oduct F
a
mil
y
Arithmetic Contr
oller Engine (A
CExTM) f
or Lo
w P
o
wer Applications
Figure 2. ACEx Application Example (Remote Keyless Entry)
Figure 3. ACE1502 8-pin SOIC and DIP Device Pinout
a) Normal Mode Operation
b) Programming Mode Operation
Figure 4. ACE1502 8-pin TSSOP Device Pinout
a) Normal Mode Operation
b) Programming Mode Operation
Figure 5. ACE1502 14-pin SOIC, TSSOP and DIP Device Pinout
a) Normal Mode Operation
b) Programming Mode Operation
VCC
VCC
Optional
LED
RF Stage
RF Interface
G0
G1
G5
G2
GND
G4
G3
LOAD
VCC
GND
SFT_OUT
CKI
1
2
3
4
5
6
7
8
SFT_IN
NC/VCC
NC
G3
VCC
GND
G2
G1
1
2
3
4
5
6
7
8
G4
G0
G5
1
2
3
4
5
6
7
8
G5
G0
G1
G2
G4
G3
VCC
GND
GND
SFT_OUT
CKI
NC
NC/VCC
1
2
3
4
5
6
7
8
VCC
LOAD
SFT_IN
G3
VCC
GND
G1
1
2
3
4
5
6
7
8
G4
NC
9
10
11
12
13
14
G6
G7
G5
NC
NC
G2
RESET
G0
LOAD
VCC
GND
CKI
1
2
3
4
5
6
7
8
SFT_IN
NC
NC
9
10
11
12
13
14
NC
NC
NC/VCC
NC
NC
SFT_OUT
RESET
A
CE1502 Pr
oduct F
a
mil
y
Arithmetic Contr
oller Engine (A
CExTM) f
or Lo
w P
o
wer Applications
3
www.fairchildsemi.com
ACE1502 Product Family Rev. 1.7
2. Electrical Characteristics
Absolute Maximum Ratings
Ambient Storage Temperature
-65 C to +150 C
Input Voltage
-0.3V to V
CC
+ 0.3V
Lead Temperature (10s max)
+300C
Electrostatic Discharge on all pins
2000V min
Operating Conditions
Relative Humidity (non-condensing)
95%
EEPROM write limits
See DC Electrical Characteristics
ACE1502 DC Electrical Characteristics,
V
CC
= 1.8 to 3.6V
All measurements are valid for ambient operating temperature unless otherwise stated.
3. Icc active current is dependant on the program code.
4. Based on a continuous IDLE looping program.
Part Number
Operating Voltage
Ambient Operating Temperature
ACE1502E
1.8 to 3.6V
-40C to +85C
ACE1502V
1.8 to 3.6V
-40C to +125C
Symbol
Parameter
Conditions
MIN
TYP
MAX
Units
Icc
3
Suppy Current - no data EEPROM
write in progress
1.8V
2.2V
2.7V
3.6V
0.4
0.4
0.5
0.6
0.6
0.6
0.7
1.0
mA
mA
mA
mA
Icc
H
HALT Mode current
2.7V @ 25C
2.7V @ -40C to +85C
100
400
5000
nA
nA
3.6V @ 25C
3.6V @ -40C to +85C
0.25
1000
10
nA
A
Icc
L
4
IDLE Mode current
1.8V
3.6V
210
250
400
A
A
Vcc
W
EEPROM write voltage
Code EEPROM in Programming Mode
3.0
3.3
3.6
V
Data EEPROM in Operating Mode
1.8
3.6
V
S
Vcc
Power Supply Slope
1s/V
10ms/V
V
IL
Input Low with Schmitt Trigger buffer
Vcc = 2.2 - 3.6V
0.2Vcc
V
Vcc < 2.2V
0.15Vcc
V
V
IH
Input High with Schmitt Trigger buffer
Vcc = 1.8 - 3.6V
0.8Vcc
V
I
IP
Input Pull-up Current
Vcc = 3.6V, V
IN
= 0V
30
65
350
A
I
TL
Tri-State Leakage
Vcc = 3.6V
2
200
nA
V
OL
Output Low Voltage:
G0, G1, G2, G3, G4, G5, G6, G7
Vcc = 1.8 - 2.7V
2 mA sink
0.2Vcc
V
Output Low Voltage:
G0, G1, G2, G3, G4, G5, G6, G7
Vcc = 3.3 - 3.6V
7.0 mA sink
0.2Vcc
V
V
OH
Output High Voltage:
G0, G1, G2, G3, G4, G5, G6, G7
Vcc = 2.2 - 2.7V
2 mA source
0.8Vcc
V
Output High Voltage:
G0, G1, G2, G3, G4, G5, G6, G7
Vcc = 3.3 - 3.6V
7 mA source
0.8Vcc
V
4
www.fairchildsemi.com
ACE1502 Product Family Rev. 1.7
A
CE1502 Pr
oduct F
a
mil
y
Arithmetic Contr
oller Engine (A
CExTM) f
or Lo
w P
o
wer Applications
ACE1502 AC Electrical Characteristics,
Vcc = 1.8 to 3.6V
All measurements are valid for ambient operating temperature unless otherwise stated.
5. The maximum permissible frequency is guaranteed by design but is not 100% tested
6. The parameter is characterized but is not 100% tested, contact Fairchild for additional characterization data.
ACE1502 Electrical Characteristics for programming
All data valid at ambient temperature between 3.0V and 3.6V. The following characteristics are guaranteed
by design but are not 100% tested. See "EEPROM write time" in the AC Electrical Characteristics for
definition of the programming ready time.
ACE1502 Low Battery Detect (LBD) Characteristics,
Vcc = 1.8 to 3.6V
ACE1502 Brown-out Reset (BOR) Characteristics,
Vcc = 1.8 to 3.6V
Parameter
Conditions
MIN
TYP
MAX
Units
Instruction cycle time from internal clock -
setpoint
3.3V at +25C
0.98
1.0
1.02
s
Internal clock frequency variation
1.8V to 3.6V at constant temperature
1.2
%
1.8V to 3.6V at full temperature range (Note 6)
6
%
Crystal oscillator frequency
(Note 5)
25
MHz
External clock frequency
(Note 5)
8
MHz
EEPROM write time
5.5
10
ms
Internal clock start up time
(Note 6)
2
ms
Oscillator start up time
(Note 6)
2400
cycles
Parameter
Description
MIN
MAX
Units
t
HI
CLOCK high time
500
DC
ns
t
LO
CLOCK low time
500
DC
ns
t
DIS
SHIFT_IN setup time
100
ns
t
DIH
SHIFT_IN hold time
100
ns
t
DOS
SHIFT_OUT setup time
100
ns
t
DOH
SHIFT_OUT hold time
900
ns
T
RESET
Power On Reset time
3.2
4.5
ms
t
LOAD1
, t
LOAD2
, t
LOAD3
, t
LOAD4
LOAD timing
5
s
Parameter
Conditions
MIN
TYP
MAX
Units
LBD voltage threshold variation
-40C to +85C
-5
+5
%
Parameter
Conditions
MIN
TYP
MAX
Units
BOR voltage threshold variation
-40C to +85C
1.72
1.83
1.92
V
5
www.fairchildsemi.com
ACE1502 Product Family Rev. 1.7
A
CE1502 Pr
oduct F
a
mil
y
Arithmetic Contr
oller Engine (A
CExTM) f
or Lo
w P
o
wer Applications
AC & DC Electrical Characteristic Graphs
The graphs in this section are for design guidance and are based on preliminary test data.
Figure 6. Internal Oscillator Frequency
Figure 7. LBD and BOR Threshold Levels
Internal Oscillator Frequency vs. Temperature
-40
0
25
85
125
Temperature [
C]
Frequency (MHz)
1.93
1.94
1.95
1.96
1.97
1.98
1.99
2
2.01
3.6V
3.3V
2.8V
2.6V
2.2V
2.0V
1.8V
LBD Levels 1,16 and 32
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-40
0
25
85
125
-40
0
25
85
125
Temperature [
C]
Voltage (V)
Level 1
Level 16
Level 32
BOR Level
1.800
1.805
1.810
1.815
1.820
1.825
1.830
1.835
1.840
Temperature [
C]
Voltage (V)
BOR Level
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