w83977tf Winbond Electronics Corp America, w83977tf Datasheet - Page 13

• Manufacturer Part Number: w83977tf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

1. PIN DESCRIPTION
Note: Please refer to Section 11.2 DC CHARACTERISTICS for details.
I/O 6t - TTL level bi-directional pin with 6 mA source-sink capability
I/O 8t - TTL level bi-directional pin with 8 mA source-sink capability
I/O 8 - CMOS level bi-directional pin with 8 mA source-sink capability
I/O 12t - TTL level bi-directional pin with 12 mA source-sink capability
I/O 12 - CMOS level bi-directional pin with 12 mA source-sink capability
I/O 16u - CMOS level bi-directional pin with 16 mA source-sink capability with internal pull-up resistor
I/OD 16u - CMOS level bi-directional pin open drain output with 16 mA sink capability with internal pull-up resistor
I/O 24t - TTL level bi-directional pin with 24 mA source-sink capability
OUT 8t - TTL level output pin with 8 mA source-sink capability
OUT 12t - TTL level output pin with 12 mA source-sink capability
OD 12 - Open-drain output pin with 12 mA sink capability
OD 24 - Open-drain output pin with 24 mA sink capability
IN t - TTL level input pin
IN c - CMOS level input pin
IN cu - CMOS level input pin with internal pull-up resitor
IN cs - CMOS level Schmitt-triggered input pin
IN ts - TTL level Schmitt-triggered input pin
IN tsu - TTL level Schmitt-triggered input pin with internal pull-up resistor
1.1 Host Interface
A0 A10
A11-A14
A15
D0 D5
D6 D7
AEN
IOCHRDY
MR
IOR
IOW
SYMBOL
74-84
86-89
109-
116-
PIN
114
117
105
106
107
108
118
91
I/O
I/O
OD
IN
IN
IN
IN
I/O
IN
IN
IN
12t
12t
ts
ts
ts
ts
t
t
t
24
System address bus bits 0-10
System address bus bits 11-14
System address bus bit 15
System data bus bits 0-5
System data bus bits 6-7
CPU I/O read signal
CPU I/O write signal
System address bus enable
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.
-5 -
FUNCTION
Publication Release Date: April 1998
W83977TF
PRELIMINARY
Revision 0.62