w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 159

• Manufacturer Part Number: w83977atf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

CRF4 (Default 0x00)
CRF5 (Default 0x00)
CRF6 (Default 0x00)
control the printer port, FDC, UART A, and UART B
for the IRQs is as follows:
Bit 1: URAIRQSTS. UART A IRQ status.
Bit 0: URBIRQSTS. UART B IRQ status.
Reserved. Return zero when read.
Reserved. Return zero when read.
SMI logic output = (URBIRQEN and URBIRQSTS) or (URAIRQEN and URAIRQSTS) or
Bit 7: Reserved. Return zero when read.
Bit 5: MOUIRQEN.
Bit 4: KBCIRQEN.
Bit 3: PRTIRQEN.
Bit 2: FDCIRQEN.
Bit 1: URAIRQEN.
These bits enable the generation of an
Bit 6: IRIRQEN.
= 0
= 1
= 0
= 1
= 0
= 1
= 0
= 1
= 0
= 1
= 0
= 1
disable the generation of an
enable the generation of an
disable the generation of an
enable the generation of an
disable the generation of an
enable the generation of an
disable the generation of an
enable the generation of an
disable the generation of an
enable the generation of an
disable the generation of an
enable the generation of an
(FDCIRQEN and FDCIRQSTS) or (PRTIRQEN and PRTIRQSTS) or
(KBCIRQEN and KBCIRQSTS) or (MOUIRQEN and MOUIRQSTS) or
(IRIRQEN and IRIRQSTS)
SMI
SMI
SMI
SMI
SMI
SMI
SMI
- 159 -
SMI
SMI
SMI
SMI
SMI
SMI
interrupt due to any IRQ of the devices. These 4 bits
interrupt due to IR's IRQ.
interrupt due to MOUSE's IRQ.
interrupt due to KBC's IRQ.
interrupt due to printer port's IRQ.
interrupt due to FDC's IRQ.
interrupt due to UART A's IRQ.
interrupt due to IR's IRQ.
interrupt due to MOUSE's IRQ.
interrupt due to KBC's IRQ.
interrupt due to printer port's IRQ.
interrupt due to FDC's IRQ.
interrupt due to UART A's IRQ.
SMI
logics respectively. The
Publication Release Date:April 1998
W83977ATF
PRELIMINARY
SMI
Revision 0.52
logic output