W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 18

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

1.1 Host Interface, continued
GP16
(WDTO)
P15
DRQ0
GP17
(PLEDO)
P14
DRQ1
DRQ2
DRQ3
TC
IRQ1
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8/ nIRQ8
IRQ9
IRQ10
IRQ11
IRQ12
DACK0
DACK1
DACK2
DACK3
RTSC
DTRC
SYMBOL
PIN
119
121
122
123
124
125
126
127
128
100
101
102
99
98
97
96
95
94
93
92
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
I/O
I/O
I/O
I/O
IN
IN
IN
IN
IN
I/O
ts
12t
12t
12t
12t
ts
ts
ts
ts
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
CR2C bit5, 4= 00 (default): DMA Channel 0 Acknowledge
signal.
CR2C bit5, 4= 01: General purpose I/O port 1 bit 6. It can be
configured as a watchdog timer output.
CR2C bit5, 4= 10: Keyboard P15 I/O port.
CR2C bit5, 4= 11: RTS output of UART C. [W83977AF only]
CR2C bit7, 6= 00 (default): DMA Channel 0 request signal.
CR2C bit7, 6= 01: General purpose I/O port 1, bit 7. It can be
configured as power LED output.
CR2C bit7, 6= 10: Keyboard P14 I/O port.
CR2C bit7, 6= 11: DTR output of UART C. [W83977AF only]
DMA Channel 1 Acknowledge signal
DMA Channel 1 request signal
DMA Channel 2 Acknowledge signal
DMA Channel 2 request signal
DMA Channel 3 Acknowledge signal
DMA Channel 3 request signal
Terminal Count. When active, this pin indicates termination of a
DMA transfer.
Interrupt request 1
Interrupt request 3
Interrupt request 4
Interrupt request 5
Interrupt request 6
Interrupt request 7
Interrupt request 8; default is nIRQ8 for RTC
Interrupt request 9
Interrupt request 10
Interrupt request 11
Interrupt request 12
W83977F/ W83977AF
FUNCTION
Publication Release Date: March 1998
PRELIMINARY
-7 -
Revision 0.58