
Chapter 7. Real-Time Clock
58
Register A
Interrupt Rate
0
7
6
5
4
3
2
1
0
Register: A
Address: 0Ah
Rate Selection
Access: Read and Write
0000 No Interrupts
0
1
UIP
0001 3.90625 ms
0010 7.8125 ms
0011 122.070 us
0100 244.141 us
0101 488.281 us
0110 976.562 us
0111 1.953125 ms
1000 3.90625 ms
1001 7.8125 ms
1010 15.625 ms
1011 31.25 ms
1100 62.5 ms
1101 125 ms
1110 250 ms
1111 500 ms
Update In Progress
0 No
1 Yes
Register A
Register B
Register: B
Address: 0Bh
Access: Read and Write
SET
PIE
AIE
UIE
0
DM
24/12 DSE
7
6
5
4
3
2
1
0
Daylight Savings
0 Disabled
1 Enabled
24-hour/12-hour Operation
0 12-hour mode
1 24-hour mode
Data Mode
0 BCD
1 Binary
Update-End Interrupt
0 Disabled
1 Enabled
Alarm Interrupt Enable
0 Disabled
1 Enabled
Periodic Interrupt Enable
0 Disabled
1 Enabled
Cycle Update
0 Real Time
1 Latch Time
Register B
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Содержание ZT 8905
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