upd75112 Renesas Electronics Corporation., upd75112 Datasheet - Page 18

• Manufacturer Part Number: upd75112
• Description: 4-bit Single Chip-microcomputer
• Manufacturer: Renesas Electronics Corporation.

18
Figure 5-3 Basic Interval Timer Configuration
Remark
5.5 Timer/Event Counter
The PD75116 has a two-channel on-chip timer/event
counters.
Channels 0 and 1 of the timer/event counter have the
same configuration and functions. They differ only in
the selectable count pulse (CP) and the function of
supplying clocks to the serial interface.
The timer/event counter has the following functions:
PD75112, 75116
*SET1
From
the Clock
Generator
fxx/2
fxx/2
fxx/2
fxx/2
:
Programmable interval timer operation
Output of square wave having any selected fre-
quency to PTOn pin
Event counter operation
Use of TIn pin as an external interrupt input pin
Output of TIn pin input divided by N to PTOn pin
(frequency divider operation)
Serial shift clock supply to the serial interface
circuit (channel 0 only)
Count status read function
BTM3
* indicates instruction execution.
5
7
9
12
BTM2
4
BTM1
MPX
3
3
BTM0
BTM
Internal Bus
Basic Interval Timer
(8-Bit Frequency Divider)
8
Clear
Wait Release Signal
When the Standby Mode
is Released
BT
Set
BT Interrupt
Request Flag
IRQBT
Clear
Vector
Interrupt
Request
Signal