W83877TF Datasheet, PDF (15/154 Pages) Winbond – I/O chip disk drive adapter

W83877TF
1.0 PIN DESCRIPTION
(Note: Refer to section 9.2 DC CHARACTERISTICS for details.)
I/O8tc - TTL level output pin with 8 mA source-sink capability; CMOS level input voltage
I/O12t - TTL level bi-directional pin with 12 mA source-sink capability
I/O24t - TTL level bi-directional pin with 24 mA source-sink capability
OUT8t - TTL level output pin with 8 mA source-sink capability
OUT12t - TTL level output pin with 12 mA source-sink capability
OD12 - Open-drain output pin with 12 mA sink capability
OD24 - Open-drain output pin with 24 mA sink capability
INt - TTL level input pin
INts - TTL level Schmitt-triggered input pin
INc - CMOS level input pin
INcs - CMOS level Schmitt-triggered input pin
1.1 Host Interface
SYMBOL
D0−D7
A0−A9
A10
IOCHRDY
MR
CS
AEN
IOR
IOW
DRQ_B
DACK_ B
PIN
66-73
51-55
57-61
75
5
6
2
62
63
64
100
98
I/O
I/O_24t
IN_t
IN_t
OD₂₄
IN_ts
IN_t
IN_t
IN_ts
IN_ts
OUT_12t
IN_ts
FUNCTION
System data bus bits 0-7.
System address bus bits 0-9.
In ECP Mode, this pin is the A10 address input.
In EPP Mode, this pin is the IO Channel Ready output to extend
the host read/write cycle.
Master Reset. Active high. MR is low during normal operations.
Active low chip select signal.
System address bus enable.
CPU I/O read signal.
CPU I/O write signal.
DMA request signal B.
DMA Acknowledge signal B.
Publication Release Date: March 1998
-5-
Version 0.61