YKP1568VG5
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: belms@belms.belpak.minsk.by
URL: www.bms.by
8-
BIT MICROCONTROLLER FOR REMOTE CONTROL TRANSMITTERS
The YKP1568VG5 is stand-alone microcontroller designate for use in remote
control transmitters for a wide range of applications. The YKP1568VG5 for this purpose
provides number of dedicated hardware functions for remote controller applications
These include the following additional blocks to the YKP1568VG X core:
- Interrupt Gate
- Hardware Modulator
- Output Driver
- Watchdog Timer.
When the transmitter is not in use the microcontroller is in STOP mode and the
oscillator is HALTED. The AND gate from P1 Port line provides the wake-up to end STOP
mode.
The Hardware Modulator produces pulse bursts according to the required protocol.
By software the `ON-time` and the `OFF-time` of each pulse and the number of pulses are
controlled.
The Output Driver can handle sufficient current to drive a single transistor, and this
can provide the required current for the LED.
The Watchdog Timer will reset the YKP1568VG5 when it has not been reloaded (
reset ) in time, because the program has run out of sequence ( endless loop, continuous
IDLE mode, etc. ). During STOP mode the oscillator is halted, so then the Watchdog Timer
is not running.
Device is functionally identical to the PCA84c122A, Philips.
FEATURES.
Two test input T0 ( ANDed with P1 input lines ), T1
3 single-level vectored interrupt sources: external ( T0/INT and Port 1, for keypad press
wake-up functions), timer/counter ( T1 ) and hardware modulator interrupt
8-bit programmable timer/counter with 5-bit pre-scalier
On-board oscillator 1MHz to 6MHz.
Single supply voltage from 2.0 V to 5.5 V.
Operating temperature range : -20 to +50
0
C
Power saving modes: Idle and Stop modes are provided
`Hardware Modulator` that provides pulse bursts of which the `on` time and `off` time of
each pulse (i.e. duty cycle) and the number of pulses are programmable
One output line from the `Hardware Modulator` to control the driver transistor for the
IR-LED. Capable of sinking 27 mA at Vdd=2.0V, Vout=1.0V
Watchdog Timer to keep the transmitter from being locked or malfunction.
Automatic system reset is generated by the WDT if the timer is not reset before overflow
from counting within a certain period of time.
DC CHARESTERISTICS.
Supply
voltage,
V 2.0
...
5.5
Supply current operating mode, mA
1.8
Operating
crystal
frequency,
MHz
6.0
Sink
current
LOW,
mA
1.6
Pull-up output source current HIGT,
A
-40
Sink current LOW (for pulse output OUT), mA
27
Source current HIGT (for pulse output OUT), mA -1.6
YKP1568VG5
Korzhenevskogo 12, Minsk, 220064, Republic of
Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,
277 69 16
E-mail: belms@belms.belpak.minsk.by
URL: www.bms.by
PIN DESCRIPTION
SYMBOL PIN
DESCRIPTION
P00
P01
P02
P03
P04
P05
P06
P07
3
2
23
22
10
11
14
15
standard I/O Port line, generally for keypad scanning
P10
P11
P12
P13
P14
P15
P16
P17
19
18
17
16
1
22
12
13
standard I/O Port line, generally for keypad scanning
TO/INT
4
test TO and external interrupt input
T1
5
test T1 input
RESET
6
active HIGH reset, normally tied to Vss
XTAL 1/2
9,8
crystal or ceramic resonator
OUT
21
pulse train output pin, capable of sinking 27 mA
Vdd 7
power
supply
Vss 20
ground
BLOCK DIAGRAM
Udd
XTAL
ROM RAM
1Kx8 32byte OSCILLATOR
HARDWARE OUTPUT
MODULATOR DRIVER OUT
WDT
KP1568 VGX
TO/INT
CORE
Uss
P01 P03 P05 P07 P09 P11 P13 P15 P17
P00 P02 P04 P06 P08 P10 P12 P14 P16 TO/INT
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