hm5216805 Renesas Electronics Corporation., hm5216805 Datasheet - Page 56

• Manufacturer Part Number: hm5216805
• Description: 16 M Lvttl Interface Sdram 100 Mhz/83 Mhz 1-mword 8-bit 2-bank/2-mword 4-bit 2-bank - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HM5216805 Series, HM5216405 Series
Power Down Mode
Power Up Sequence
56
Address
/DQML
DQMU
CKE
RAS
CAS
I/O(output)
CLK
WE
CS
I/O
I/O(input)
DQMU
/DQML
Address
A11(BS)
RAS
CAS
CKE
CLK
WE
CS
Precharge command
If needed
All banks
Precharge
V
V
IH
IH
Valld
0
A10=1
1
t
RP
Auto Refresh
2
t
RP
3
Power down entry
4
5
CKE Low
t
RC
6
7
Auto Refresh
8
9
High-Z
Power down
mode exit
10
Active Bank 0
t
RC
48 49 50 51 52 53 54 55
High-Z
R: a
Mode register
Set
Power down cycle
RAS-CAS delay=3
CAS latency=2
Burst length=4
code
= V
t
RSA
IH
Bank active
If needed
or V
Valld
IL