參數資料
型號: μPD789167Y
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: 47/145頁
文件大小: 610K
代理商: ΜPD789167Y
Preliminary Product Information
46
μ
PD789166Y, 789167Y, 789176Y, 789177Y
5.4.3
8-bit timer/event counter control registers
The following two types of registers are used to control the 8-bit timer/event counter.
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. It also controls the operation of the output control circuit of 8-bit timer counter 80.
TMC80 is manipulated using a 1-bit or 8-bit memory manipulation instruction.
A RESET input clears TMC80 to 00H.
Figure 5-18. Format of 8-Bit Timer Mode Control Register 80
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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