W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 130

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

CR23 (Default 0x00)
CR24 (Default 0b1ss00sss)
Bit 3 : PRTPWD
Bit 2 : IRPWD
Bit 1 : Reserved.
Bit 0 : FDCPWD
Bit7-6 : Reserved
Bit 5-3 : APDTMS2 APDTMS1 APDTMS0
Bit 2-0 : OSCS2, OSCS1, OSCS0.
Bit 7 : EN16SA
Bit 6-5 : CLKSEL, ENPLL
Bit 4 : RWPNPREG
Bit 3 : Reserved
= 0 Power down
= 1 No Power down
= 0 Power down
= 1 No Power down
= 0 Power down
= 1 No Power down
= 000
= 001
= 010
= 011
= 100
= 101
= 110
= 111
= 000 Default power-on state after power on reset.
= 1xx Stop Clock supply to whole chip, but PLL circuit still in operation.
= 001 Stop Clock supply to whole chip and PLL circuit.
= 010 Standby for automatic power-down(APD).
= 011 Automatic power-down(APD) has been happened.
= 0 12 bit Address Qualification
= 1 16 bit Address Qualification
= 00 The clock input on Pin 1 should be 14.31818 Mhz.
= 01 The clock input on Pin 1 should be 24 Mhz.
= 11 The clock input on Pin 1 should be 48 Mhz.
= 0 Disable read/write PnP mode config registers by using the method of non-PnP mode
= 1 Enable read/write PnP mode config registers by using the method of non-PnP mode
4 seconds count-down time of the APD mode.
8 seconds count-down time of the APD mode.
16 seconds count-down time of the APD mode.
32 seconds count-down time of the APD mode.
1 minute count-down time of the APD mode.
4 minutes count-down time of the APD mode.
16 minutes count-down time of the APD mode.
2 minutes count-down time of the APD mode.
- 118 -
W83977F/ W83977AF
Publication Release Date: March 1998
PRELIMINARY
Revision 0.58