w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 7

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

1.0 PIN DESCRIPTION
Note: Please refer to Section 12.2 DC CHARACTERISTICS for details.
I/O
I/O
I/O
I/O
I/O
I/O
I/OD
I/O
OUT
OUT
OD
OD
IN
IN
IN
IN
IN
IN
1.1 Host Interface
A0 A10
A11-A14
A15
D0 D5
D6 D7
AEN
IOCHRDY
MR
IOR
IOW
t
c
cu
cs
ts
tsu
6t
8t
8
12t
12
16u
24t
- TTL level input pin
12
24
SYMBOL
- CMOS level input pin
- TTL level Schmitt-triggered input pin
- CMOS level bi-directional pin with 8 mA source-sink capability
- CMOS level input pin with internal pull-up resitor
- CMOS level Schmitt-triggered input pin
16u
- TTL level Schmitt-triggered input pin with internal pull-up resistor
- TTL level bi-directional pin with 6 mA source-sink capability
- TTL level bi-directional pin with 8 mA source-sink capability
8t
12t
- CMOS level bi-directional pin with 12 mA source-sink capability
- TTL level bi-directional pin with 12 mA source-sink capability
- TTL level bi-directional pin with 24 mA source-sink capability
- Open-drain output pin with 12 mA sink capability
- Open-drain output pin with 24 mA sink capability
- CMOS level bi-directional pin with 16 mA source-sink capability with internal pull-up resistor
- TTL level output pin with 8 mA source-sink capability
- CMOS level bi-directional pin open drain output with 16 mA sink capability with internal pull-up resistor
- TTL level output pin with 12 mA source-sink capability
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.
-6-
FUNCTION
Publication Release Date: April 1998
W83977ATF
PRELIMINARY
Revision 0.52