EM73PA88A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
INTERRUPT CONTROL
TRGB request
TRGA request
DATA BUS
12 BIT COUNTER
12 BIT COUNTER
P8.1/
TRGB
EVENT COUNTER CONTROL
TIMER CONTROL
EVENT COUNTER CONTROL
TIMER CONTROL
P8.3/
TRGA
PULSE-WIDTH MEASUREMENT
CONTROL
PULSE-WIDTH MEASUREMENT
CONTROL
internal clock
internal clock
TMSA
IPSA
TMSB
IPSB
P28
P29
TIMER/COUNTER CONTROL
P8.1/TRGB, P8.3/TRGA are the external timer inputs for timerB and timerA, they are used in event
counter and pulse-width measurement mode.
Timer/counter command port: P28 is the command port for timer/counterA and P29 is for the timer/
counterB.
TIMER/COUNTER MODE SELECTION
Port 28
3
2
1
0
TMSA IPSA
Initial state: 0000
TMSA (B)
0 0
Function description
Stop
0 1
1 0
1 1
Event counter mode
Timer mode
Port 29
3
2
1
0
TMSB IPSB
Initial state: 0000
Pulse width measurement mode
INTERNAL PULSE-RATE SELECTION
DUAL mode
IPSA(B)
0 0
SLOW mode
Reserved
3
LXIN/2 Hz
7
7
0 1
LXIN/2 Hz
LXIN/2 Hz
11
11
1 0
1 1
LXIN/2 Hz
LXIN/2 Hz
15
15
LXIN/2 Hz
LXIN/2 Hz
* This specification are subject to be changed without notice.
10.8.2001
20
ELAN [ ELAN MICROELECTRONICS CORP ]
