Table 5-21. Divider Chain Control / Test Selection; Table 5-22. Periodic Interrupt Rate Encoding; Table 5-23. Bcd And Binary Formats - AMD Geode SC1200 Data Book

32579B

Table 5-21. Divider Chain Control / Test Selection

DV2 DV1 DV0
CRA6 CRA5 CRA4
0 0 X
0 1 0
0 1 1
1 0 X
1 1 X
Parameter
Seconds 00 to 59
Minutes 00 to 59
Hours 12-hour mode:
24-hour mode:
Day 01 to 07 (Sunday = 01)
Date 01 to 31
Month 01 to 12 (January = 01)
Year 00 to 99
Century 00 to 99
114
Configuration
Oscillator Disabled
Normal Operation
Test
Divider Chain Reset

Table 5-23. BCD and Binary Formats

BCD Format
01 to 12 (AM)
81 to 92 (PM)
00 to 23

Table 5-22. Periodic Interrupt Rate Encoding

Rate Select Periodic Interrupt
3 2 1 0 Rate (msec)
0 0 0 0 No interrupts
0 0 0 1 3.906250
0 0 1 0 7.812500
0 0 1 1 0.122070
0 1 0 0 0.244141
0 1 0 1 0.488281
0 1 1 0 0.976562
0 1 1 1 1.953125
1 0 0 0 3.906250
1 0 0 1 7.812500
1 0 1 0 15.625000
1 0 1 1 31.250000
1 1 0 0 62.500000
1 1 0 1 125.000000
1 1 1 0 250.000000
1 1 1 1 500.000000
Binary Format
00 to 3B
00 to 3B
12-hour mode: 01 to 0C (AM)
81 to 8C (PM)
24-hour mode: 00 to 17
01 to 07
01 to 1F
01 to 0C
00 to 63
00 to 63
AMD Geode™ SC1200/SC1201 Processor Data Book
SuperI/O Module
Divider
Chain Output
7
8
2
3
4
5
6
7
8
9
10
11
12
13
14