參數(shù)資料
型號(hào): M34518M4-XXXSP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDIP32
封裝: 0.400 INCH, 1.78 MM PITCH, PLASTIC, SDIP-32
文件頁數(shù): 3/157頁
文件大?。?/td> 1783K
代理商: M34518M4-XXXSP
ML610Q411/ML610Q412/ML610Q415 User’s Manual
Chapter 6
Clock Generation Circuit
6 – 15
6.4
Specifying port registers
When you want to make sure clock output functions are working, please check related port registers are specified. See
Chapter 20, “Port2” for detail about the port registers.
6.4.1
Functioning P21 (OUTCLK) as the high speed clock output
Set P21MD bit (bit1 of P2MOD register) to “1” for specifying the high speed clock output as the secondary function
of P21.
Reg. name
P2MOD register (Address: 0F214H)
Bit
7
6
5
4
3
2
1
0
Bit name
-
P22MD
P21MD
P20MD
Data
-
*
1
*
Set P21C1 bit (bit1 of P2CON1 register) to “1” and set P21C0 bit(bit1 of P2CON0 register) to “1”, for specifying the
P21 as CMOS output.
Reg. name
P2CON1 register (Address: 0F213H)
Bit
7
6
5
4
3
2
1
0
Bit name
-
P22C1
P21C1
P20C1
Data
-
*
1
*
Reg. name
P2CON0 register (Address: 0F212H)
Bit
7
6
5
4
3
2
1
0
Bit name
-
P22C0
P21C0
P20C0
Data
-
*
1
*
Data of P21D bit (bit1 of P2D register) does not affect to the high speed clock output function, so don’t care the data
for the function.
Reg. name
P2D register (Address: 0F210H)
Bit
7
6
5
4
3
2
1
0
Bit name
-
P22D
P21D
P20D
Data
-
*
**
*
- : Bit does not exist.
* : Bit not related to the high speed clock function
** : Don’t care the data.
Note:
P21(Port2) is an output-only port, does not have an register to select the data direction(input or output).
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