S71GS128NB0 SPANSION [SPANSION], S71GS128NB0 Datasheet - Page 177

• Manufacturer Part Number: S71GS128NB0
• Description: 128N based MCPs
• Manufacturer: SPANSION [SPANSION]

A d v a n c e
I n f o r m a t i o n
CE#
OE#
WE#
ADDRESS
Address Valid
Data Valid
DATA
LB#/UB#
t RC = READ Cycle Time
Don't Care
Figure 66. READ Operation
CE#
OE#
WE#
ADDRESS
Address Valid
Data Valid
DATA
LB#/UB#
t WC = WRITE Cycle Time
Don't Care
Figure 67. WRITE Operation
Page Mode READ Operation
Page mode is a performance-enhancing extension to the legacy asynchronous
READ operation. In page mode-capable products, an initial asynchronous read
access is performed, then adjacent addresses can be quickly read by simply
changing the low-order address. Addresses A[3:0] are used to determine the
members of the 16-address CellularRAM page. Addresses A[4] and higher must
remain fixed during the entire page mode access.
Figure 68
shows the timing di-
agram for a page mode access.
CellularRAM-2A
177
December 15, 2004 cellRAM_02_A0