W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 109

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

DV[2:0] : Divider Control
These three bits are used to control divider and 32KHz oscillator.
RS[3:0] : Periodic Interrupt Rate
PERIODIC INTERRUPT RATE TABLE
FREQUENCY
TIME-BASE
32.768KHZ
32.768KHZ
32.768KHZ
32.768KHZ
32.768KHZ
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
RS[3:0]
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
DV2
0
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DV1
0
1
1
0
1
DV0
X
X
X
0
1
- 97 -
OPERATION MODE
122.070 S / 8.192KHz
244.141 S / 4.096KHz
488.281 S / 2.048KHz
976.562 S / 1.024KHz
YES
NO
NO
NO
NO
1.953125mS / 512Hz
3.90625mS / 256Hz
3.90625mS / 256Hz
7.8125mS / 128Hz
7.8125mS / 128Hz
15.625ms / 64Hz
31.25ms / 32Hz
62.5ms / 16Hz
125ms / 8Hz
250ms / 4Hz
500ms / 2Hz
W83977F/ W83977AF
TIME BASE
None
Publication Release Date:March 1998
DIVIDER RESET
PRELIMINARY
YES
-
-
-
-
Revision 0.58