參數(shù)資料
型號(hào): μPD789197
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): 47/146頁
文件大?。?/td> 630K
代理商: ΜPD789197
Preliminary Product Information
47
μ
PD789186, 789187, 789196, 789197
6.4.3
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 80, 81, and 82 (TMC80, TMC81, and TMC82)
Port mode registers 2 and 3 (PM2 and PM3)
(1) 8-bit timer mode control register 80 (TMC80)
TMC80 determines whether to enable or disable 8-bit timer register 80 (TM80) and specifies the count clock for
TM80.
TMC80 is manipulated using a 1-bit or 8-bit memory manipulation instruction.
A RESET input clears TMC80 to 00H.
Figure 6-18. 8-Bit Timer Mode Control Register 80 Format
TCE80
PWME80
0
0
0
TCL801TCL800
TOE80
TMC80
Symbol
Address
When reset
R/W
FF53H
00H
R/W
6
7
5
4
3
2
1
0
TCL801
0
0
1
1
8-bit timer register 80 count clock selection
TCL800
0
1
0
1
f
X
f
X
/2
3
Rising edge of TI80
Falling edge of TI80
TCE80
0
1
8-bit timer register 80 operation control
Operation disabled (TM80 is cleared to 0.)
Operation enabled
PWME80
0
1
PWM output selection
Counter operation
PWM output
(5.0 MHz)
(625 kHz)
TOE80
0
1
8-bit timer/counter 80 output control
Output disabled (port mode)
Output enabled
Cautions 1. Always stop the timer before setting TMC80.
2. For PWM mode operation, the interrupt mask flag (TMMK80) must be set.
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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