SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 123

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

Revision 3.0
SuperI/O Module
Table 4-21. Divider Chain Control / Test Selection
Index Programmable
Index Programmable
CRA6
DV2
7:0
7:0
Bit
0
0
0
1
1
Description
Month Alarm Data. Values may be 01 to 12 in BCD format or 01 to 0C in Binary format.
When bits 7 and 6 are both set to one (“11”), unconditional match is selected. (Default)
Century Data. Values may be 00 to 99 in BCD format or 00 to 63 in Binary format.
CRA5
DV1
0
1
1
0
1
CRA4
DV0
X
X
X
0
1
(Continued)
Configuration
Oscillator Disabled
Normal Operation
Test
Divider Chain Reset
Table 4-20. RTC Registers (Continued)
Month Alarm Register - MONA (R/W)
Century Register - CEN (R/W)
123
Rate Select
Table 4-22. Periodic Interrupt Rate Encoding
3 2 1 0
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
1 1 0 0
1 1 0 1
1 1 1 0
1 1 1 1
Periodic Interrupt
No interrupts
Rate (msec)
125.000000
250.000000
500.000000
15.625000
31.250000
62.500000
3.906250
7.812500
0.122070
0.244141
0.488281
0.976562
1.953125
3.906250
7.812500
Reset Type: V
Reset Type: V
Chain Output
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Divider
10
11
12
13
14
7
8
2
3
4
5
6
7
8
9
PP
PP
PUR
PUR