w83637hg Winbond Electronics Corp America, w83637hg Datasheet - Page 108

• Manufacturer Part Number: w83637hg
• Description: Winbond Lpc I/o Lpc I/o
• Manufacturer: Winbond Electronics Corp America

CR26 (Default 0b0s000000)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
= 1
= 1
= 0
= 1
: SEL4FDD
= 0
= 1
These two bits define how to enable Configuration mode. The corresponding power-on
setting pin is NRTSA (pin 51).
HEFRAS Address and Value
= 0
= 1
: LOCKREG
= 0 Enable R/W Configuration Registers
= 1 Disable R/W Configuration Registers.
:Reserve
: DSFDLGRQ
= 0 Enable FDC legacy mode on IRQ and DRQ selection, then DO register bit 3 is
effective on selecting IRQ
not effective on selecting IRQ
: DSPRLGRQ
= 0
on selecting IRQ
effective on selecting IRQ
: DSUALGRQ
= 0
selecting IRQ
= 1
selecting IRQ
: DSUBLGRQ
selecting IRQ
selecting IRQ
Write 87h to the location 2E twice.
Write 87h to the location 4Etwice.
Disable FDC legacy mode on IRQ and DRQ selection, then DO register bit 3 is
Disable PRT legacy mode on IRQ and DRQ selection, then DCR bit 4 is not
Enable UART B legacy mode IRQ selecting, then MCR bit 3 is effective on
Disable UART B legacy mode IRQ selecting, then MCR bit 3 is not effective on
Select two FDD mode.
Select four FDD mode.
: HEFRAS
Enable PRT legacy mode on IRQ and DRQ selection, then DCR bit 4 is effective
Enable UART A legacy mode IRQ selecting, then MCR bit 3 is effective on
Disable UART A legacy mode IRQ selecting, then MCR bit 3 is not effective on
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Publication Release Date: March, 2006
W83637HF/HG
Revision 1.6