IDT7204 IDT [Integrated Device Technology], IDT7204 Datasheet - Page 11

• Manufacturer Part Number: IDT7204
• Description: CMOS ASYNCHRONOUS FIFO
• Manufacturer: IDT [Integrated Device Technology]

TRUTH TABLES
TABLE 1 – RESET AND RETRANSMIT
SINGLE DEVICE CONFIGURATION/WIDTH EXPANSION MODE
NOTE:
1. Pointer will Increment if flag is HIGH.
TABLE 2 – RESET AND FIRST LOAD
DEPTH EXPANSION/COMPOUND EXPANSION MODE
NOTES:
1.
2. RS = Reset Input, FL/RT = First Load/Retransmit, EF = Empty Flag Output, FF = Full Flag Output, XI = Expansion Input, HF = Half-Full Flag Output
IDT7203/7204/7205/7206/7207/7208 CMOS ASYNCHRONOUS FIFO
2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9
Reset
Retransmit
Read/Write
Reset First Device
Reset All Other Devices
Read/Write
XI is connected to XO of previous device. See Figure 14.
Figure 14. Block Diagram of 6,144 x 9, 12,288 x 9, 24,576 x 9, 49,152 x 9, 98,304 x 9, 196,608 x 9 FIFO Memory (Depth Expansion)
FULL
RS
W
Mode
Mode
D
9
RS
RS
0
1
1
0
0
1
Inputs
FL/RT
Inputs
FL/RT
X
0
1
0
1
X
9
9
(1)
(1)
(1)
XI
XI
FF
9
0
0
0
FF
FF
Location Zero
Location Zero
Increment
Read Pointer
Location Zero
Location Zero
Read Pointer
7203
7204
7205
7206
7207
7208
7203
7204
7205
7206
7207
7208
7203
7204
7205
7206
7207
7208
IDT
IDT
IDT
11
XO
XO
XO
XI
XI
XI
X
(1)
EF
EF
FL
FL
FL
Internal Status
Internal Status
EF
Location Zero
Unchanged
Increment
Write Pointer
Location Zero
Location Zero
Write Pointer
X
COMMERCIAL, INDUSTRIAL AND MILITARY
(1)
9
EF
0
X
X
EF
TEMPERATURE RANGES
0
0
X
2661 drw16
Outputs
Outputs
R
Q
EMPTY
V
FF
1
X
X
CC
APRIL 3, 2006
FF
X
1
1
HF
1
X
X