W83977EF Winbond Electronics Corp America, W83977EF Datasheet - Page 93

• Manufacturer Part Number: W83977EF
• Description: Description = W83877TF Plus Kbc, GP I/O, Wake-Up, Power Fail Resume ;; Package = QFP 128
• Manufacturer: Winbond Electronics Corp America

CR24 (Default 0b1s000s0s)
CR25 (Default 0x00)
Bit 7: EN16SA
Bit 6: EN48
Bit 5 - 3: Reserved.
Bit 2: ENKBC
Bit 1: Reserved
Bit 0: PNPCSV#
Bit 7 - 6: Reserved
Bit 5: URBTRI
Bit 4: URATRI
Bit 3: PRTTRI
Bit 2 - 1 : Reserved
Bit 0: FDCTRI.
= 0 12 bit Address Qualification
= 1 16 bit Address Qualification
= 0 The clock input on Pin 1 should be 24 Mhz.
= 1 The clock input on Pin 1 should be 48 Mhz.
The corresponding power-on setting pin is SOUTB (pin 53).
= 0 KBC is disabled after hardware reset.
= 1 KBC is enabled after hardware reset.
This bit is read only, and set/reset by power-on setting pin. The corresponding power-on
setting pin is SOUTA (pin 46).
= 0 The Compatible PnP address select registers have default values.
= 1 The Compatible PnP address select registers have no default value.
When trying to make a change to this bit, new value of PNPCSV# must be complementary to
the old one to make an effective change. For example, the user must set PNPCSV# to 0 first
and then reset it to 1 to reset these PnP registers if the present value of PNPCSV# is 1. The
corresponding power-on setting pin is NDTRA (pin 44).
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Publication Release Date: April 2003
W83977EF
Revision 1.1