參數資料
型號: μPD789407
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位單片機微控制器(8位單片微控制器)
文件頁數: 44/128頁
文件大?。?/td> 607K
代理商: ΜPD789407
44
μ
PD789405, 789406, 789407
5.4.3 8-bit timer/event counter control registers
The 8-bit timer/event counter is controlled by the following registers.
8-bit timer mode control registers 0, 1, and 2 (TMC0, TMC1, and TMC2)
Port mode register 2 (PM2)
(1) 8-bit timer mode control register 0 (TMC0)
TMC0 determines whether to enable or disable 8-bit timer register 0 (TM0) and specifies the count clock for
TM0.
TMC0 is set using a 1-bit or 8-bit memory manipulation instruction.
A RESET input clears TMC0 to 00H.
Figure 5-16. 8-Bit Timer Mode Control Register 0 Format
TCE0
0
0
0
0
TCL01 TCL00
0
TMC0
Symbol
Address
When reset
R/W
FF53H
00H
R/W
6
7
5
4
3
2
1
0
TCL01
0
0
1
1
8-bit timer register 0 count clock selection
TCL00
0
1
0
1
f
X
/2
6
f
X
/2
9
Rising edge of TI0
Falling edge of TI0
TCE0
0
1
8-bit timer register 0 operation control
Operation disabled (TM0 is cleared to 0.)
Operation enabled
(9.77 kHz)
Caution
Always stop the timer before setting TMC0.
Remarks 1.
f
X
: Main system clock oscillation frequency
2.
The parenthesized values apply to operation at f
X
= 5.0 MHz.
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