EM6620 Datasheet, PDF (20/56 Pages) EM Microelectronic - MARIN SA – Ultra Low Power Microcontroller with 4x8 LCD Driver

R
EM6620
6.6 Port B registers
Table 6.6.1 Register RegPBData
Bit
Name
3
PBData[3]
2
PBData[2]
1
PBData[1]
0
PBData[0]
Reset
-
-
-
-
R/W
R* /W
R* /W
R* /W
R* /W
Description
PB[3] input and output
PB[2] input and output
PB[1] input and output
PB[0] input and output
R* : Direct read on port B terminal (not the internal register read).
Table 6.6.2 Register RegPBCntl
Bit
Name
Reset
R/W
3
PBIOCntl[3]
0
R/W
2
PBIOCntl[2]
0
R/W
1
PBIOCntl[1]
0
R/W
0
PBIOCntl[0]
0
R/W
Default "0" is: PortB in input mode
Description
I/O control for PB[3]
I/O control for PB[2]
I/O control for PB[1]
I/O control for PB[0]
Table 6.6.3 Register RegPB0Comp
Bit
Name
Reset
R/W
3
--
--
--
2
PB0CompResult
0
R
1
PB0CompEnable
0
R/W
0
PB0CompSelect
0
R/W
Default "0" is: Power supply voltage level detection
Description
Comparator result flag
Comparator measurements enable
Dynamic input Comparator function
Table 6.6.4 register OPTFSelPB
Bit
Name
power on
R/W
Description
value
3
PB1HzOut
0
R/W
Ck[1] output on PB[2]
2
PB2kHzOut
0
R/W
Ck[12] output on PB[1]
1
PB32kHzOut
0
R/W
Ck[16] output on PB[0]
0
NoInputRes
0
R/W
No Input Reset From Port A
Default "0" is: No frequency output, Port A can reset the EM6620.
Table 6.6.5 option register OPTNoPdPB
Bit
Name
power on
R/W
value
3
NoPdPB[3]
0
R/W
2
NoPdPB[2]
0
R/W
1
NoPdPB[1]
0
R/W
0
NoPdPB[0]
0
R/W
Default "0" is: Pull-down on
Table 6.6.6 option register OPTNchOpDPB
Bit
Name
power on
R/W
value
3
NchOpDPB[3]
0
R/W
2
NchOpDPB[2]
0
R/W
1
NchOpDPB[1]
0
R/W
0
NchOpDPB[0]
0
R/W
Default "0" is: CMOS on PB[3..0]
Description
No pull-down on PB[3]
No pull-down on PB[2]
No pull-down on PB[1]
No pull-down on PB[0]
Description
Nch. Open Drain on PB[3]
Nch. Open Drain on PB[2]
Nch. Open Drain on PB[1]
Nch. Open Drain on PB[0]
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