參數(shù)資料
型號: 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位單片機微控制器(8位單片微控制器)
文件頁數(shù): 48/146頁
文件大?。?/td> 630K
代理商: ΜPD789197
Preliminary Product Information
48
μ
PD789186, 789187, 789196, 789197
(2) 8-bit timer mode control register 81 (TMC81)
TMC81 determines whether to enable or disable 8-bit timer register 81 (TM81) and specifies the count clock for
TM81.
TMC81 is manipulated using a 1-bit or 8-bit memory manipulation instruction.
A RESET input clears TMC81 to 00H.
Figure 6-19. 8-Bit Timer Mode Control Register 81 Format
TCE81
PWME81
0
0
0
TCL811TCL810
TOE81
TMC81
Symbol
Address
When reset
R/W
FF57H
00H
R/W
6
7
5
4
3
2
1
0
TCL811
0
0
1
1
8-bit timer register 81 count clock selection
TCL810
0
1
0
1
f
X
/2
4
f
X
/2
8
Rising edge of TI81
Falling edge of TI81
TCE81
0
1
8-bit timer register 81 operation control
Operation disabled (TM81 is cleared to 0.)
Operation enabled
PWME81
0
1
PWM output selection
Counter operation
PWM output
(312.5 kHz)
(19.5 kHz)
TOE81
0
1
8-bit timer/counter 81 output control
Output disabled (port mode)
Output enabled
Cautions 1. Always stop the timer before setting TMC81.
2. For PWM mode operation, the interrupt mask flag (TMMK81) 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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