Download DIGITAL-LOGIC MSB900L User manual

DIGITAL-LOGIC AG
MSB900/L Detailed Technical Manual V1.0
CMOS Map
Location
00h
Description
Time of day (seconds) specified in BCD
01h
Alarm (seconds) specified in BCD
02h
Time of day (minutes) specified in BCD
03h
Alarm (minutes) specified in BCD
04h
Time of day (hours) specified in BCD
05h
Alarm (hours) specified in BCD
06h
Day of week specified in BCD
07h
Day of month specified in BCD
08h
Month specified in BCD
09h
Year specified in BCD
0Ah
Status Register A
Bit 7
= Update in progress
Bits 6-4 = Time based frequency divider
Bits 3-0 = Rate selection bits that define the periodic
interrupt rate and output frequency.
0Bh
Status Register B
Bit 7
= Run/Halt
0 Run
1 Halt
Bit 6
= Periodic Timer
0 Disable
1 Enable
Bit 5
= Alarm Interrupt
0 Disable
1 Enable
Bit 4
= Update Ended Interrupt
0 Disable
1 Enable
Bit 3
= Square Wave Interrupt
0 Disable
1 Enable
Bit 2
= Calendar Format
0 BCD
1 Binary
Bit 1
= Time Format
0 12-Hour
1 24-Hour
Bit 0
= Daylight Savings Time
0 Disable
1 Enable
0Ch
Status Register C
Bit 7
= Interrupt Flag
Bit 6
= Periodic Interrupt Flag
Bit 5
= Alarm Interrupt Flag
Bit 4
= Update Interrupt Flag
Bits 3-0 = Reserved
0Dh
Status Register D
Bit 7
= Real Time Clock
0 Lost Power
1 Power
Continued...
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