w83626f Winbond Electronics Corp America, w83626f Datasheet - Page 16

• Manufacturer Part Number: w83626f
• Description: Lpc To Isa Bridge Set
• Manufacturer: Winbond Electronics Corp America

CR17 (Power LED & IRQIN Control Register, Default 0x00)
Bit 7 -6: Reserved
Bit 5 -4: =00 Power LED pin is tri-stated.
Bit 3 - 0: These bits select IRQ resource for IRQIN. Four bits transfer the decimal value to octal
Bit [3..0] = 1100b = 0xCh means IRQ12 be selected
CR20 (Chip ID Register 1, Default 0x62)
Bit 7 - 0:DEVIDB7 - DEBIDB0 --> Device ID Bit 7 - Bit 0 =
CR21 (Chip ID Register 2, Default 0x6x)
Bit 7 - 0: DEVREVB7 - DEBREVB0 --> Device Rev Bit 7 - Bit 0 = 0x61(read only).
Bit [3..0] indicate the version of the chip.
CR30 (Mask Range of Address Decoder 1 Register, Default 0x00)
This register is used to mask address bits (A7~A0) for specify address decoder, if the corresponding bit
of this register is set to a 1, the corresponding address bit (A7~A0) is ignore by the specify address
decoder.
For example: If the decoding range is 0x3F8 ~ 0x3FF, you can set 0x3F8 to CR 31, 32 and 07h to CR30.
CR31, 32 (Address Decoder 1 Specification Register, Default 0x00)
This register contains the address for specify decoder.
CR 31 Bit [7..0] are used to define low byte of specify address.
CR 32 Bit [7..0] are used to define high byte of specify address.
For example: Decoding address was set to be 0x3F5h and write F5h to CR 31 and 03h to CR 32 .
CR33 ((Mask Range of Address Decoder 2 Register, Default 0x00)
This register is used to mask address bits (A7~A0) for specify address decoder, if the corresponding bit
of this register is set to a 1, the corresponding address bit (A7~A0) is ignore by the specify address
decoder.
CR33 .
For example: If the decoding range is 0x3F8 ~ 0x3FF,you can set 0x3F8 to CR 34, 35 and 07h to
=01 Power LED pin is driven low.
=10 Power LED pin is a 1Hz toggle pulse with 50 duty cycle.
=11 Power LED pin is a 1/4 Hz toggle pulse with 50 duty cycle.
system. For example: Bit [3..0] = 1001b = 0x9h means IRQ 9 be selected.
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W83626F/W83626D/W83626G
0x
62(read only).