m5m4v4s40ctp-12 Mitsumi Electronics, Corp., m5m4v4s40ctp-12 Datasheet - Page 24

• Manufacturer Part Number: m5m4v4s40ctp-12
• Description: 2-bank 131072-word 16-bit Synchronous Dram
• Manufacturer: Mitsumi Electronics, Corp.

SDRAM (Rev. 0.3)
SELF REFRESH
Once initiated, the self-refresh is maintained as long as CKE is kept low. During the self-refresh mode,
CKE is asynchronous and all other inputs including CLK are disabled and ignored. Disabling all inputs
except CKE during self-refresh reduces power consumption. To exit the self-refresh, supply a stable CLK
input, issue a DESEL or NOP command, and set CKE=H (REFSX). After tRC from REFSX both banks
will be in the idle state new commands can be issued. Until the tRC time has expired, only DESELor NOP
commands may be asserted after an REFSX command.
Feb ‘97 Preliminary
Self-refresh mode is entered by issuing a REFS command (/CS= /RAS= /CAS= L, /WE= H, CKE= L).
A0-8
/RAS
/CAS
CKE
CLK
/CS
/WE
BA
Self Refresh Entry
4M (2-BANK x 131072-WORD x 16-BIT) Synchronous DRAM
Self-Refresh
MITSUBISHI ELECTRIC
M5M4V4S40CTP-12, -15
Stable CLK
Self Refresh Exit
NOP
minimum tRC
for recovery
MITSUBISHI LSIs
new command
X
0
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