HYB18M1G320BF QIMONDA [Qimonda AG], HYB18M1G320BF Datasheet - Page 41

• Manufacturer Part Number: HYB18M1G320BF
• Description: DRAMs for Mobile Applications 1-Gbit x32 DDR Mobile-RAM
• Manufacturer: QIMONDA [Qimonda AG]

1) These parameters account for the number of clock cycles and depend on the operating frequency, as follows:
2) A maximum of eight AUTOREFRESH commands can be posted to the DDR Mobile-RAM device, meaning that the maximum absolute
Rev.1.00, 2007-03
02022006-J7N7-GYFP
Parameter
AUTO REFRESH to ACTIVE/AUTO REFRESH command period
PRECHARGE command period
Self refresh exit to next valid command delay
Refresh period
Average periodic refresh interval (8192 rows)
Command
no. of clock cycles = specified delay / clock period; round to the next higher integer.
interval between any Refresh command and the next Refresh command is 8 * tREFI.
A10 (AP)
Address
CKE
DQ
CK
CK
Pre All
PRE
High-Z
NOP
t
RP
Self Refresh
Timing Parameters for AUTO REFRESH and SELF REFRESH Commands
Mode
Enter
ARF
> t
RFC
Self Refresh
Exit from
Mode
NOP
41
NOP
t
XSR
t
t
t
t
t
RFC
RP
XSR
REF
REFI
NOP
Symbol
Recommended)
Any Command
(Auto Refresh
ARF
75
22.5
120
–
–
Self Refresh Entry and Exit
min.
1-Gbit DDR Mobile-RAM
- 7.5
NOP
–
–
–
64
7.8
HY[B/E]18M1G320BF
t
RFC
max.
FIGURE 35
TABLE 14
= Don't Care
Unit
ns
ns
ns
ms
µs
Row n
Row n
Ba A,
ACT
Data Sheet
Note
1)
1)
1)
–
2)