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參數(shù)資料
| 型號： | UPD17233MC |
| 廠商： | NEC Corp. |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機的小型通用紅外遙控器 |
| 文件頁數(shù)： | 39/92頁 |
| 文件大?。?/td> | 378K |
| 代理商： | UPD17233MC |
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Data Sheet U14360EJ1V0DS00
μ
PD17230, 17231, 17232, 17233, 17234, 17235, 17236
39
5.2
Function of 8-bit Timer (with modulo function)
Notes 1.
When the STOP mode is released, bit 3 must be set.
2.
Bit 2 is a write-only bit.
Caution If the system clock is changed while the timer is counting, an error occurs in the timer as follows
(when system clock f
X
= 4 MHz):
High-speed mode 16/f
X
→
Normal mode 32/f
X
... (Error due to resolution of set timer) +1.5
μ
s
Normal mode 32/f
X
→
High-speed mode 16/f
X
... (Error due to resolution of set timer) –1.5
μ
s
3
2
1
0
TMEN
TMRES
TMCK1
TMCK0
Address
RF : 33H
TMRES
On reset
8H
R/W
R/W
0
1
8-Bit Timer Reset Flag
Data read out is always "0"
Resets 8-bit counter and IRQTM
TMEN
0
1
8-Bit Timer Count Enable Flag
Stops 8-bit timer count operation
Enable 8-bit timer count operation (falling edge)
TMCK1
TMCK0
0
0
0
1
1
0
1
1
8-Bit Timer Clock Source Selection
Count clock: f
X
/32
(measurable time range: 8 s to 2.048 ms,
Resolution: 8 s (error: +8 s))
Count clock: f
X
/64
(measurable time range: 16 s to 4.096 ms,
Resolution: 16 s (error: +16 s))
Count clock: f
X
/256
(measurable time range: 64 s to 16.384 ms,
Resolution: 64 s (error: +64 s))
Remote controller carrier generator circuit output
(Carrier output: 1 s to 128 s, Resolution: 1 s)
Value indicated by parentheses is for when
( ): f (system clock) = f
X
= 4MHz
SYS
Note 1
Note 2
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