BQ2022A_17 Datasheet, PDF (12/37 Pages) Texas Instruments – 1K-Bit Serial EPROM with SDQ Interface

bq2022A
SLUS724E – SEPTEMBER 2006 – REVISED MARCH 2016
Selected
State
Write Memory
N
Command?
(0Fh)
Y
Bus Master Transmits Low Byte Address
(LSB First) AD0 to AD7
Selected
State
Bus Master Transmits High Byte Address
(LSB First) AD8 to AD15
bq2022A
Loads Address Into Address Counter
bq2022A Transmits CRC of Write Command
and Address, then Clears CRC Register
bq2022A Receives 8 Bytes of Data and
Stores in RAM Buffer
bq2022A Transmits
CRC of Previous Received 8 Bytes of Data
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N
Code 5Ah
Y
Received
Contents of RAM buffer AND’ed with contents of
data memory offset by
address counter and stored in data
memory offset by address counter .
programming time required to be at
least t _EPROG when VPP Vdc on data pin
Voltage on Data ^N
Pin = VPP
Y
bq2022A
Increments Address
Counter and Transmits 1
Byte of Data Memory
Indexed by Address Counter
bq2022A
Transmits 1 Byte of Data Memory
at Address Counter
8th Byte
N
Transmitted
Y
NOTE: Individual bytes of address and data are transmitted LSB first
bq2022A Waits for Reset
(No Further Response)
Figure 9. WRITE MEMORY Command Flow
7.5.7 READ STATUS Command
The READ STATUS command is used to read data from the EPROM status data field. After issuing a SKIP ROM
command, the host issues the READ STATUS command, AAh, followed by the address low byte and then the
address high byte.
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