參數(shù)資料
型號: μPD789406
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機(jī)微控制器(8位單片微控制器)
文件頁數(shù): 48/128頁
文件大小: 607K
代理商: ΜPD789406
48
μ
PD789405, 789406, 789407
5.5
Clock Timer
5.5.1 Clock timer functions
The clock timer has the following functions.
Clock timer
Interval timer
The clock and interval timers can be used at the same time.
Figure 5-20 is a block diagram of the clock timer.
Figure 5-20. Clock Timer Block Diagram
f
X
/2
7
f
XT
f
W
f
W
2
4
f
W
2
5
f
W
2
6
f
W
2
7
f
W
2
8
f
W
2
9
Clear
9-bit prescaler
S
Clear
5-bit counter
INTWT
INTWTI
WTM7WTM6 WTM5WTM4
0
WTM1WTM0
Clock timer mode
control register (WTM)
Internal bus
S
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