EM6621
16. Option Register Memory Map
The values of the option registers are set by initial reset on power up and through write operations only.
Other resets ; as reset from watchdog, reset from input port A, reset from pin RESET, etc. do not change the
options register value
.
Register
Name
OPTDebIntPA
OPT[3:0]
OPTIntEdgPA
OPT[7:4]
OPTNoPullPA
OPT[11:8]
OPTNoPdPB
OPT[15:12]
OPTNchOpDPB
OPT[19:16]
OPTNchOpDPS
OPT[23:20]
OPTFSelPB
OPT[31:28]
7C
124
0000
7B
123
0000
7A
122
0000
79
121
0000
78
120
0000
77
119
0000
76
118
0000
Add
Hex
Add
Dec.
Reset
Value
b’3210
0000
Read Bits
Write Bits
Remarks
Debouncer on port A
for interrupt gen.
Default: debouncer on
Interrupt edge select on
port A.
Default: pos. edge
Pull-down selection on
port A
Default: pull-down
Pull-down selection on
port B
Default: pull-down
Nch. open drain
output on port B
Default: CMOS output
Nch. open drain
output on port serial
Default: CMOS output
Frequency output on
port B, reset from sleep
mode with port A
Reset through port A
inputs selection.
Refer to reset part
Reset through port A
inputs selection.
Refer to reset part
No Pull-down on port SP
Default: pull-down
75
117
OPTInpRSel1
OPTInpRSel2
7D
125
0000
OPTNoPdPS
OPT[35:32]
RegTestEM
7E
126
0000
Read / Write Bits
0: NoDebIntPA[0]
1: NoDebIntPA[1]
2: NoDebIntPA[2]
3: NoDebIntPA[3]
0: IntEdgPA[0]
1: IntEdgPA[1]
2: IntEdgPA[2]
3: IntEdgPA[3]
0: NoPullPA[0]
1: NoPullPA[1]
2: NoPullPA[2]
3: NoPullPA[3]
0: NoPdPB[0]
1: NoPdPB[1]
2: NoPdPB[2]
3: NoPdPB[3]
0: NchOpDPB[0]
1: NchOpDPB[1]
2: NchOpDPB[2]
3: NchOpDPB[3]
0: NchOpDPS[0]
1: NchOpDPS[1]
2: NchOpDPS[2]
3: NchOpDPS[3]
0: PB1HzOut
1: PB1kHzOut
2: PB32kHzOut
3: InpResSleep
0: InpRes1PA[0]
1: InpRes1PA[1]
2: InpRes1PA[2]
3: InpRes1PA[3]
0: InpRes2PA[0]
1: InpRes2PA[1]
2: InpRes2PA[2]
3: InpRes2PA[3]
0: NoPdPS[0]
1: NoPdPS[1]
2: NoPdPS[2]
3: NoPdPS[3]
----
----
7F
127
----
for EM test only;
©
EM Microelectronic-Marin SA, 03/99, Rev. B/
03/02 REV. D/444
Copyright
2002, EM Microelectronic-Marin SA
54
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