Double Late Write, Pipelined Read Truth Table
Preliminary
GS8170DW18/36/72C-333/300/250
E1 E ADV W B
CK (tn) (tn) (tn) (tn) (tn)
Previous
Operation
Current Operation
DQ/CQ
(tn)
DQ/CQ
(tn+1)
DQ/CQ
(tn+2)
0→1 X F 0 X X
X
Bank Deselect
***
Hi-Z
---
0→1 X X 1 X X Bank Deselect Bank Deselect (Continue)
Hi-Z
Hi-Z
---
0→1 1 T 0 X X
X
Deselect
***
Hi-Z/CQ
---
0→1 X X 1 X X
Deselect
Deselect (Continue)
Hi-Z/CQ
Hi-Z/CQ
---
Write
0→1 0 T 0 0 T
X
Loads new address
***
Stores DQx if Bx = 0
***
D1/CQ
Write (Abort)
0→1 0 T 0 0 F
X
Loads new address
***
No data stored
***
Hi-Z/CQ
Write Continue
0→1 X X 1 X T
Write
Increments address by 1
***
Stores DQx if Bx = 0
Dn-1/CQ
Dn/CQ
Write Continue (Abort)
0→1 X X 1 X F
Write
Increments address by 1
***
No data stored
Dn-1/CQ
Hi-Z/CQ
0→1 0 T 0 1 X
X
Read
Loads new address
***
Q1/CQ
---
0→1 X X 1 X X
Read
Read Continue
Increments address by 1
Qn-1/CQ
Qn/CQ
---
Notes:
1. If E2 = EP2 and E3 = EP3, then E = “T” else E = “F”.
2. If one or more Bx = 0, then B = “T” else B = “F”.
3. “1” = input “high”; “0” = input “low”; “X” = input “don’t care”; “T” = input “true”; “F” = input “false”.
4. “***” indicates that the DQ input requirement / output state and CQ output state are determined by the previous operation.
5. “---” indicates that the DQ input requirement / output state and CQ output state are determined by the next operation.
6. DQs are tristated in response to Bank Deselect, Chip Deselect, and Write commands, one full cycle after the command is sampled.
7. CQs are tristated in response to Bank Deselect commands only, one full cycle after the command is sampled.
8. Up to three (3) Continue operations may be initiated after a Read or Write operation is initiated to burst transfer up to four (4) distinct pieces
of data per single external address input. If a fourth (4th) Continue operation is initiated, the internal address wraps back to the initial exter-
nal (base) address.
Rev: 1.00d 6/2002
18/36
© 2002, Giga Semiconductor, Inc.
Specifications cited are design targets and are subject to change without notice. For latest documentation contact your GSI representative.