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W83627DHG
Publication Release Date: Aug, 22, 2007
-182- Version
1.4
CR 25h. (Interface Tri-state Enable; Default 00h)
BIT
READ / WRITE
DESCRIPTION
7~6 Reserved.
5
R / W
UARTBTRI
4
R / W
UARTATRI
3
R / W
PRTTRI
2~1 Reserved.
0
R / W
FDCTRI.
CR 26h. (Global Option; Default 0s000000b)
s: value by strapping
BIT
READ / WRITE
DESCRIPTION
7 Reserved.
6
R / W
HEFRAS =>
= 0 Write 87h to location 2E twice.
= 1 Write 87h to location 4E twice.
The corresponding power-on strapping pin is RTSA# (Pin 51).
5
R / W
LOCKREG =>
= 0 Enable R/W configuration registers.
= 1 Disable R/W configuration registers.
4 Reserved.
3
R / W
DSFDLGRQ =>
= 0 Enable FDC legacy mode for IRQ and DRQ selection. Then DO
register (base a 2) bit 3 is effective when selecting IRQ.
= 1 Disable FDC legacy mode for IRQ and DRQ selection. Then DO
register (base a 2) bit 3 is not effective when selecting IRQ.
2
R / W
DSPRLGRQ =>
= 0 Enable PRT legacy mode for IRQ and DRQ selection. Then DCR
register (base a 2) bit 4 is effective when selecting IRQ.
= 1 Disable PRT legacy mode for IRQ and DRQ selection. Then DCR
register (base a 2) bit 4 is not effective when selecting IRQ.
1
R / W
DSUALGRQ =>
= 0 Enable UART A legacy mode for IRQ selection. Then HCR register
(base
a 4) bit 3 is effective when selecting IRQ.
= 1 Disable UART A legacy mode for IRQ selection. Then HCR register
(base a 4) bit 3 is not effective when selecting IRQ.
0
R / W
DSUBLGRQ =>
= 0 Enable UART B legacy mode for IRQ selection. Then HCR register
(base
a 4) bit 3 is effective when selecting IRQ.
= 1 Disable UART B legacy mode for IRQ selection. Then HCR register
(base a 4) bit 3 is not effective when selecting IRQ.
Summary of Contents for W83627DHG
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