DIGITAL-LOGIC Microspace MSB900L User Manual page 30

DIGITAL-LOGIC AG
CMOS Map
Location Description
00h 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
Bits 6-4 = Time based frequency divider
Bits 3-0 = Rate selection bits that define the periodic
0Bh Status Register B
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0Ch Status Register C
Bit 7
Bit 6
Bit 5
Bit 4
Bits 3-0 = Reserved
0Dh Status Register D
Bit 7
Continued...
= Update in progress
interrupt rate and output frequency.
= Run/Halt
0 Run
1 Halt
= Periodic Timer
0 Disable
1 Enable
= Alarm Interrupt
0 Disable
1 Enable
= Update Ended Interrupt
0 Disable
1 Enable
= Square Wave Interrupt
0 Disable
1 Enable
= Calendar Format
0 BCD
1 Binary
= Time Format
0 12-Hour
1 24-Hour
= Daylight Savings Time
0 Disable
1 Enable
= Interrupt Flag
= Periodic Interrupt Flag
= Alarm Interrupt Flag
= Update Interrupt Flag
= Real Time Clock
0 Lost Power
1 Power
MSB900/L Detailed Technical Manual V1.0
30