AL4CS241 AverLogic Technologies, Inc., AL4CS241 Datasheet - Page 8

• Manufacturer Part Number: AL4CS241
• Manufacturer: AverLogic Technologies, Inc.

/REN2
/OE
RCLK
Miscellaneous & Flags Signals
/RS
/FF
/EF
/PAE
/PAF
Power/Ground Signals
VCC
GND
8.0 Memory Operations
8.1 Inputs and Outputs
8.1.1 DATA INPUTS (D8
D8 ~ D0 are 9-bit wide of input data port.
AL4CS211/AL4CS221/AL4CS231/AL4CS241/AL4CS251
Symbol
Symbol
Pin
Pin
Programmabl
Programmabl
Read Enable 8
Read Clock 7
Empty Flag 10
e Almost-
e Almost-
Pin name
Pin name
Full Flag
Full Flag
Full Flag
Ground
Output
Enable
Power
Reset
9
25
11
4
3
21
5
Pin no.
Pin no.
TQFP
TQFP
~
D0)
12
13
11
29
15
14
8
7
25
9
Pin no.
Pin no.
PLCC
PLCC
AL4CS211/AL4CS221/AL4CS231/AL4CS241/AL4CS251
I/O
I/O
typ
typ
O
O
O
O
I
I
I
I
-
-
When /REN1 and /REN2 are LOW, data is read
from the FIFO on every rising edge of RCLK.
Data will not be read from the FIFO if the /EF is
LOW.
When /OE is LOW, the data output bus is
active. If /OE is HIGH, the output data bus will
be in high-impedance.
Data is read from the FIFO on a rising edge of
RCLK when /REN1 and /REN2 are LOW, and
if the FIFO is not empty.
When /RS is set LOW, internal read and write
pointers are set to the first location of the RAM
array, /FF and /PAF go HIGH, and /PAE and
/EF go LOW. A reset is required before an
initial WRITE after power-up.
/FF indicates whether or not the FIFO memory
is full.
/EF indicates whether or not the FIFO memory
is empty.
When /PAE is LOW, the FIFO is Almost-Empty
based on the offset programmed into the FIFO.
When /PAF is LOW, the FIFO is Almost –Full
based on the offset programmed into the FIFO.
3.3V
Ground.
10% power supply
Description
Description
December 14, 2001
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