w83626f Winbond Electronics Corp America, w83626f Datasheet - Page 19

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

CR44 (Tristate controllable Register (Power-down Mode3) , Default 0x07)
Bit 7:
Bit 6:
Bit 5:
Bit 4:
Bit 3:
Bit 2 -0: Set SYSCLK divided ratio.(2,4,8,16,32,64)
=1 Enable Power-down functions.(ISOLATE# was power-on setting.)
=0 Normal used.
Reserved.
=1 SA10 is set as mask (ignored) bit in ADDRESS DECODER 2.
The function is used to improved
the performance of ECP mode of LPT.
If the decoding range is 0x378-0x37F and 0x778-0x77F
,you can set this bit to 1 for Fast Mode operation.
= 0 Normal operation.
=1 SA10 is set as mask (ignored) bit in ADDRESS DECODER 1.
The function is used to improved
the performance of ECP mode of LPT.
If the decoding range is 0x378-0x37F and 0x778-0x77F
,you can set this bit to 1 for Fast Mode operation.
= 0 Normal operation.
SERIRQ POWER DOWN SELECT.
=1 When the chip is in power down mode, the SERIRQ block is inactive.
=0 When the chip is in power down mode, the SERIRQ block is active.
= 000 Disable Power-down Mode3.
= 001 SYSCLK divided by 2.
= 010 SYSCLK divided by 4.
= 010 SYSCLK divided by 4
= 011 SYSCLK divided by 8
= 100 SYSCLK divided by 16
= 101 SYSCLK divided by 32
= 110 SYSCLK divided by 64
= 111 LPC I/F,all clocks and signals will be tristated.
W83626F/W83626D/W83626G
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Publication Release Date: May 25, 2005
Revision A1