upd75238 Renesas Electronics Corporation., upd75238 Datasheet - Page 77
upd75238
Manufacturer Part Number
upd75238
Description
4 Bit Single-chip Microcomputer
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD75238.pdf
(190 pages)
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- Download datasheet (2Mb)
4.8 EVENT COUNTER
(1) Configuration of the event counter
(2) Event counter functions
The event counter of the PD75238 has a noise eliminator. Fig. 4-36 shows the configuration of the counter.
Caution The TI0/P13 pin is an external event pulse input pin shared between timer/event counter #0
The event counter provides the following functions:
(a) Event counter operation
(b) Function of reading the state of counting
(c) Count pulse edge specification
(d) Noise elimination function
TI0/P13
TM1.2
and event counter #1.
Timer/counter #0
Fig. 4-36 Block Diagram of the Event Counter
Noise
eliminator
8-bit
counter
Internal bus
f
4
x
T1
GATEC.0
Overflow
flag
IRQT1
TM1.4
PD75238
77
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