參數(shù)資料
型號(hào): 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(jì)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(jì)算機(jī))
文件頁數(shù): 67/162頁
文件大?。?/td> 482K
代理商: HD40C4389
HD404374/HD404384/HD404389/HD404082/HD404084 Series
67
Bit
Read/Write
Initial value on reset
Bit name
3
W
0
MIS3
2
W
0
Not used
*1
1
W
0
MIS1
0
W
0
MIS0
t
RC
selection
(See figure 15 in the
Operating Modes section)
Miscellaneous register (MIS: $005)
Bit 2 of the miscellaneous register must always be set to 0. The microcomputer will malfunction
if it is set to 1.
MIS3
0
1
pull-up MOS control
All pull-ups MOS off
pull-up MOS active
Note: 1. This bit must always be set to 0. The microcomputer will malfunction if it is set to 1.
MIS2
0
1
Setting bit2
Set to 0
Use prohibited
Figure 30 Miscellaneous Register (MIS:$005)
Handling of I/O Pins Not Used by User System
If I/O pins that are not used by the user system are left floating, they may generate noise that can result in
chip malfunctions. Therefore, the pin potential must be fixed.
In this case, pull the pins up to V
CC
with the built-in pull-up MOS or with an external resistor of
approximately 100 k
.
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