参数资料
型号: EM6640SO18A
英文描述: Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-SOIC
中文描述: 微控制器
文件页数: 14/62页
文件大小: 620K
代理商: EM6640SO18A
EM6640
03/02 REV. C/446
Copyright
2002, EM Microelectronic-Marin SA
21
www.emmicroelectronic.com
6.5 PortB registers
Table 6.5.1 register RegPBData
Bit
Name
Reset
R/W
Description
3
PBData[3]
-
R* /W
PB[3] input and output
2
PBData[2]
-
R* /W
PB[2] input and output
1
PBData[1]
-
R* /W
PB[1] input and output
0
PBData[0]
-
R* /W
PB[0] input and output
R* : direct read on pin (not the internal register read).
Table 6.5.2 register RegPBCntl
Bit
Name
Reset
R/W
Description
3
PBIOCntl[3]
0
R/W
I/O control for PB[3]
2
PBIOCntl[2]
0
R/W
I/O control for PB[2]
1
PBIOCntl[1]
0
R/W
I/O control for PB[1]
0
PBIOCntl[0]
0
R/W
I/O control for PB[0]
Default "0" is: PortB in input mode
Table 6.5.3 register OPTFSelPB
Bit
Name
power on
value
R/W
Description
3-
-
2
PB2k3HzOut
0
R/W
ck[12] output on PB[2]
1
PB37k5HzOut
0
R/W
ck[16] output on PB[1]
0
PB600kHzOut
0
R/W
ck[20] output on PB[0]
Default "0" is: No frequency output.
Table 6.5.4 option register OPTNoPdPB
Bit
Name
power on
value
R/W
Description
3
NoPdPB[3]
0
R/W
No pull-down on PB[3]
2
NoPdPB[2]
0
R/W
No pull-down on PB[2]
1
NoPdPB[1]
0
R/W
No pull-down on PB[1]
0
NoPdPB[0]
0
R/W
No pull-down on PB[0]
Default "0" is: Pull-down on
Table 6.5.5 option register OPTNchOpDPB
Bit
Name
power on
value
R/W
Description
3
NchOpDPB[3]
0
R/W
N-Channel Open Drain on PB[3]
2
NchOpDPB[2]
0
R/W
N-Channel Open Drain on PB[2]
1
NchOpDPB[1]
0
R/W
N-Channel Open Drain on PB[1]
0
NchOpDPB[0]
0
R/W
N-Channel Open Drain on PB[0]
Default "0" is: CMOS on PB[3..0]
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