w83977atg Winbond Electronics Corp America, w83977atg Datasheet - Page 141

• Manufacturer Part Number: w83977atg
• Description: W83877tf Plus Kbc, Gp I/o, Wake-up, Fir, Cir, Pb-free
• Manufacturer: Winbond Electronics Corp America

CR28 (Default 0x00)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7 - 5
Bit 4
Bit 3
: HEFRAS
These two bits define how to enable Configuration mode. The corresponding power-on
setting pin is NRTSA (pin 43). HEFRAS Address and Value
= 0
= 1
: LOCKREG
= 0
= 1
: DSIRLGRQ
= 0
= 1
: DSFDLGRQ
= 0
= 1
: DSPRLGRQ
= 0
= 1
: DSUALGRQ
= 0
= 1
: DSUBLGRQ
= 0
= 1
: Reserved.
: IRQ Sharing selection.
= 0
= 1
:Reserved
effective
Write 87h to the location 3F0h twice.
Write 87h to the location 370h twice.
Enable R/W Configuration Registers.
Disable R/W Configuration Registers.
Enable IR legacy mode IRQ selecting, then MCR bit 3 is effective on selecting
IRQ
Disable IR legacy mode IRQ selecting, then MCR bit 3 is not effective on
selecting IRQ
Enable FDC legacy mode on IRQ and DRQ selection, then DO register bit 3 is
effective on selecting IRQ
Disable FDC legacy mode on IRQ and DRQ selection, then DO register bit 3 is
not effective on selecting IRQ
Enable PRT legacy mode on IRQ and DRQ selection, then DCR bit 4 is
Disable PRT legacy mode on IRQ and DRQ selection, then DCR bit 4 is not
effective on selecting IRQ
Enable UART A legacy mode IRQ selecting, then MCR bit 3 is effective on
selecting IRQ
Disable UART A legacy mode IRQ selecting, then MCR bit 3 is not effective on
selecting IRQ
Enable UART B legacy mode IRQ selecting, then MCR bit 3 is effective on
selecting IRQ
Disable UART B legacy mode IRQ selecting, then MCR bit 3 is not effective on
selecting IRQ
Disable IRQ Sharing
Enable IRQ Sharing
on selecting IRQ
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W83977ATF/W83977ATG
Publication Release Date: May 2006
Revision 0.6