參數(shù)資料
型號: HD40C4389
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機(jī))
中文描述: 低電壓如同在微機(jī)芯片的A / D轉(zhuǎn)換器(帶片上的A / D轉(zhuǎn)換器的低壓微計算機(jī))
文件頁數(shù): 66/162頁
文件大?。?/td> 482K
代理商: HD40C4389
HD404374/HD404384/HD404389/HD404082/HD404084 Series
66
R2
0
/TOC pin mode selection
R2
0
TOC
Bit
Read/Write
Initial value on reset
Bit name
3
W
0
PMR33
2
W
0
PMR32
PMR32
0
1
PMR33
0
1
R2
2
/SI/SO pin mode selection
R2
2
SI
SO
1
W
0
PMR31
PMR31
0
1
R2
1
/
SCK
pin mode selection
R2
1
SCK
0
W
0
PMR30
PMR30
0
1
Port mode register 3 (PMR3: $00B)
: Don't care
Figure 29 Port Mode Register 3 (PMR3: $00B)
Pull-Up MOS Control
Program-controllable pull-ups MOS are incorporated in all I/O pins.
On/off control of all pull-ups MOS is performed by bit 3 (MIS3) of the miscellaneous register (MIS: $005)
and the port data register (PDR) for each pin, enabling the pull-up MOS to be turned on or off
independently for each pin (table 22, figure 30).
Except for analog input multiplexed pins, the pull-up MOS on/off setting can be made independent of the
setting as an on-chip supporting module pin.
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