HB52R329E22-F Datasheet, PDF (62/66 Pages) Elpida Memory – 256 MB Registered SDRAM DIMM 32-Mword × 72-bit, 100 MHz Memory Bus, 2-Bank Module (36 pcs of 16 M × 4 Components) PC100 SDRAM

HB52R329E22-F
Auto Refresh Cycle
CK
CKE
S
RE
CE
;;^;;;;;;;;;W
;^{;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; BA}
; Address
DQMB
Din
;^{;; Dout}
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
V_IH
A10=1
Precharge
If needed
t _RP
Auto Refresh
t _RC
High-Z
t_RC
Auto Refresh
R:a
C:a
Active
Bank 0
Read
Bank 0
a a+1
Refresh cycle and
Read cycle
RE-CE delay = 2
CE latency = 4
Burst length = 4
= V_IH or V_IL
Self Refresh Cycle
; _CK
;;;;;;CKE
S
RE
CE
W
CKE Low
BA
Address
A10=1
DQMB
Din
Dout
t_RP
Precharge command Self refresh entry
If needed
command
l _SREX
High-Z
t_RC
Self refresh exit
ignore command
or No operation
Next Self refresh entry
clock command
enable
t_RC
Next ^Auto
clock ^refresh
enable
Self refresh cycle
RE-CE delay = 3
CE latency = 4
Burst length = 4
= V_IH or V_IL
;^{;;Data Sheet No. E0112H10}
62