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M58CR064C Datasheet(PDF) 13 Page - STMicroelectronics

Part # M58CR064C
Description  64 Mbit 4Mb x 16, Dual Bank, Burst 1.8V Supply Flash Memory
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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M58CR064C, M58CR064D, M58CR064P, M58CR064Q
COMMAND INTERFACE - STANDARD COMMANDS
The following commands are the basic commands
used to read, write to and configure the device.
Refer to Table 5, Standard Commands, in con-
junction with the following text descriptions.
Read Array Command
The Read Array command returns the addressed
bank to Read Array mode. One Bus Write cycle is
required to issue the Read Array command and re-
turn the addressed bank to Read Array mode.
Subsequent read operations will read the ad-
dressed location and output the data. A Read Ar-
ray command can be issued in one bank while
programming or erasing in the other bank. Howev-
er if a Read Array command is issued to a bank
currently executing a Program or Erase operation
the command will be ignored.
Read Status Register Command
A Bank’s Status Register indicates when a Pro-
gram or Erase operation is complete and the suc-
cess or failure of operation itself. Issue a Read
Status Register command to read the Status Reg-
ister content of the addressed Bank. The Read
Status Register command can be issued at any
time, even during Program or Erase operations.
The following Bus Read operations output the con-
tent of the Status Register of the addressed bank.
The Status Register is latched on the falling edge
of E or G signals, and can be read until E or G re-
turns to VIH. Either E or G must be toggled to up-
date the latched data. See Table 8 for the
description of the Status Register Bits. This mode
supports asynchronous or single synchronous
reads only.
Read Electronic Signature Command
The Read Electronic Signature command reads
the Manufacturer and Device Codes, the Block
Locking Status, the Protection Register, and the
Configuration Register.
The Read Electronic Signature command consists
of one write cycle to an address within the bottom
bank. A subsequent read operation in the address
of the bottom bank will output the Manufacturer
Code, the Device Code, the protection Status of
Blocks of the bottom bank, the Die Revision Code,
the Protection Register, or the Read Configuration
Register (see Table 6).
If the first write cycle of Read Electronic Signature
command is issued to an address within the top
bank, a subsequent read operation in an address
of the top bank will output the protection Status of
blocks of the top bank. The status of the other
bank is not affected by the command (see Table
11). This mode supports asynchronous or single
synchronous reads only, it does not support page
mode or synchronous burst reads.
Read CFI Query Command
The Read CFI Query command is used to read
data from the Common Flash Interface (CFI)
memory area located in the bottom bank. The
Read CFI Query Command consists of one Bus
Write cycle, to an address within the bottom bank.
Once the command is issued subsequent Bus
Read operations in the same bank read from the
Common Flash Interface.
If a Read CFI Query command is issued in a bank
that is executing a Program or Erase operation the
bank will go into Read Status Register mode, sub-
sequent Bus Read cycles will output the Status
Register and the Program/Erase controller will
continue to Program or Erase in the background.
When the Program or Erase operation has fin-
ished the device will enter Read CFI Query mode.
This mode supports asynchronous or single syn-
chronous reads only, it does not support page
mode or synchronous burst reads.
The status of the other banks is not affected by the
command (see Table 11). After issuing a Read
CFI Query command, a Read Array command
should be issued to the addressed bank to return
the bank to read mode.
See Appendix B, Common Flash Interface, Tables
30, 31, 32, 33, 34 and 35 for details on the infor-
mation contained in the Common Flash Interface
memory area.
Clear Status Register Command
The Clear Status Register command can be used
to reset (set to ‘0’) error bits SR1, SR3, SR4 and
SR5 in the Status Register of the addressed bank.
One bus write cycle is required to issue the Clear
Status Register command. After the Clear Status
Register command the bank returns to Read Array
mode.
The error bits in the Status Register do not auto-
matically return to ‘0’ when a new command is is-
sued. The error bits in the Status Register should
be cleared before attempting a new Program or
Erase command.
Block Erase Command
The Block Erase command can be used to erase
a block. It sets all the bits within the selected block
to ’1’. All previous data in the block is lost. If the
block is protected then the Erase operation will
abort, the data in the block will not be changed and
the Status Register will output the error. The Block
Erase command can be issued at any moment, re-
gardless of whether the block has been pro-
grammed or not.
Two Bus Write cycles are required to issue the
command.
s
The first bus cycle sets up the Erase command.


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