參數(shù)資料
型號: μPD789405
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): 39/128頁
文件大?。?/td> 607K
代理商: ΜPD789405
39
μ
PD789405, 789406, 789407
Figure 5-12. 16-Bit Timer Mode Control Register 5 Format
TOD5
TOD5 TOF5 CPT51CPT50 TOC5 TCL51 TCL50 TOE5
TMC5
Symbol
Address
When reset
R/W
FF48H
00H
R/W
Note 1
5
6
4
3
2
1
0
Causes the 16-bit timer output data to be held.
7
TOF5
0
1
Overflow flag control
Reset or cleared by software
Set when the 16-bit timer overflows
CPT51
0
0
1
1
Capture edge selection
CPT50
0
1
0
1
Capture operation disabled
Captured at the rising edge at the CPT5 pin
Captured at the falling edge at the CPT5 pin
Captured at both the rising and falling edges at the CPT5 pin
TOC5
0
1
Timer output data inversion control
Inversion disabled
Inversion enabled
TCL51
0
0
16-bit timer register 5 count clock selection
TCL50
0
1
f
X
(5.0 MHz)
Note 2
f
X
/2
5
(156.3 kHz)
Note 3
Not to be specified
TOE5
0
1
16-bit timer/counter 5 output control
Output disabled (port mode)
Output enabled
Other settings
Notes 1.
Bit 7 is read-only.
2.
If the count clock is set to f
X
(TCL51 = 0, TCL50 = 0), the capture function cannot be used. To read
the timer output, the CPU clock must be set to the main system clock high-speed mode (PCC1 = 0,
CSS0 = 0). (See
Figure 5-8.
)
3.
To read the timer output, the CPU clock must be set to the main system clock (PCC1 = 0, CSS0 = 0
or PCC1 = 1, CSS0 = 0). (See
Figure 5-8.
)
Remarks 1.
f
X
: Main system clock oscillation frequency
The parenthesized values apply to operation at f
X
= 5.0 MHz.
2.
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