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UPD17P136ACT Datasheet(PDF) 132 Page - NEC

Part # UPD17P136ACT
Description  4-BIT SINGLE-CHIP MICROCONTROLLER
PDF  292 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD17P136ACT Datasheet(HTML) 132 Page - NEC

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CHAPTER 13 PERIPHERAL HARDWARE
113
Figure 13-2. Timer 0 Mode Register
RF : 11H
Read/write
Initial value when reset
Bit 3
TM0EN
0
Bit 2
TM0RES
0
Bit 1
TM0CK1
0
Bit 0
TM0CK0
0
R/W
Read = R, Write = W
TM0CK1
0
0
1
1
TM0CK0
0
1
0
1
Selects count pulse of timer 0
fX/256
fX/64
fX/16
External clock from INT pin
TM0RES
0
Resets timer 0
Does not affect timer 0
Resets timer 0 count register and
IRQTM0
1
TM0EN
0
1
Starts timer 0
Stops counting by timer 0
Starts counting by timer 0
Remark TM0RES is automatically cleared to 0 after it
has been set to 1.
This bit is always 0 when it is read.
Remark TM0EN can be used as a status flag that
detects the counting status of timer 0
(1: counting in progress, 0: counting is stopped).



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