CY7C421 CYPRESS [Cypress Semiconductor], CY7C421 Datasheet - Page 5

• Manufacturer Part Number: CY7C421
• Manufacturer: CYPRESS [Cypress Semiconductor]

Pin Definitions
Document Number: 38-06001 Rev. *H
W
R
D
Q
XI
XO
HF
FF
EF
MR
RT
FL
V
GND
Signal Name
0
CC
0
–D
–Q
8
8
Write Signal
Read Signal
Input Data
Output Data
Expansion In
Expansion Out
Half Full Flag
Full Flag
Empty Flag
Master Reset
Retransmit
First Load
Power
Ground
Description
I/O
O Data Out from the FIFO
O Cascaded: Connected to XI of next device
O Half-full flag: When HF is LOW, half of the FIFO is full.
O When FF is LOW, the FIFO is full.
O When EF is LOW, the FIFO is empty.
I
I
I
I
I
I
I
I
I
Write into the FIFO
Read from the FIFO
Data into the FIFO
Cascaded: Connected to XO of pervious device
Non-Cascaded: Connected to V
Non-Cascaded: Connected to V
FIFO Reset
Causes FIFO to retransmit the data
Width expansion: Connected to V
Depth expansion: when Gnd indicates that part is first to be loaded all others connected to
V
Voltage Supply
Ground
CC
CC
CC
CC
Function
CY7C421
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