M58WR064 STMICROELECTRONICS [STMicroelectronics], M58WR064 Datasheet - Page 26

• Manufacturer Part Number: M58WR064
• Description: 64 Mbit 4Mb x 16, Multiple Bank, Burst 1.8V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M58WR064ET, M58WR064EB
(no wrap). The Wrap Burst bit is used to select be-
tween wrap and no wrap. When the Wrap Burst bit
is set to ‘0’ the burst read wraps; when it is set to
‘1’ the burst read does not wrap.
Burst length Bits (CR2-CR0)
The Burst Length bits set the number of Words to
be output during a Synchronous Burst Read oper-
ation as result of a single address latch cycle.
They can be set for 4 words, 8 words or continu-
ous burst, where all the words are read sequential-
ly.
In continuous burst mode the burst sequence can
cross bank boundaries.
In continuous burst mode or in 4, 8 words no-wrap,
depending on the starting address, the device as-
26/82
serts the WAIT output to indicate that a delay is
necessary before the data is output.
If the starting address is aligned to a 4 word
boundary no wait states are needed and the WAIT
output is not asserted.
If the starting address is shifted by 1,2 or 3 posi-
tions from the four word boundary, WAIT will be
asserted for 1, 2 or 3 clock cycles when the burst
sequence crosses the first 64 word boundary, to
indicate that the device needs an internal delay to
read the successive words in the array. WAIT will
be asserted only once during a continuous burst
access. See also Table 10, Burst Type Definition.
CR14, CR5 and CR4 are reserved for future use.