參數(shù)資料
型號: μPD789217Y
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): 41/144頁
文件大小: 632K
代理商: ΜPD789217Y
Preliminary Product Information
41
μ
PD789216Y, 789217Y
Figure 6-12. Format of 16-Bit Timer Mode Control Register 90
TOD90 TOF90
CPT901CPT900
TOC90
TCL901 TCL900
TOE90
TMC90
Symbol
Address
When reset
R/W
FF48H
00H
R/W
Note
5
6
4
3
2
1
0
7
TOF90
0
1
Overflow flag control
Reset or cleared by software
Set when the 16-bit timer overflows
CPT901
0
0
1
1
Capture edge selection
CPT900
0
1
0
1
Capture operation disabled
Captured at the rising edge at the CPT90 pin
Captured at the falling edge at the CPT90 pin
Captured at both the rising and falling edges at the CPT90 pin
TOC90
0
1
Timer output data inversion control
Inversion disabled
Inversion enabled
TCL901
0
0
1
1
16-bit timer counter 90 count clock selection
TCL900
0
1
0
1
TOE90
0
1
16-bit timer counter 90 output control
Output disabled (port mode)
Output enabled
TOD90
0
1
Timer output data
Timer output of 0
Timer output of 1
f
CC
/2
2
(1.0 MHz)
f
CC
/2
6
(62.5 kHz)
f
CC
/2
7
(31.3 kHz)
f
XT
(32.768 kHz)
Note
Bit 7 is read-only.
Remarks 1.
f
CC
: Main system clock oscillation frequency
f
XT
: Subsystem clock oscillation frequency
The parenthesized values apply to operation at f
CC
= 4.0 MHz or f
XT
= 32.768 kHz.
2.
3.
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