BQ2022_13 Datasheet, PDF (9/20 Pages) Texas Instruments – 1K-BIT SERIAL EPROM WITH SDQ INTERFACE

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bq2022
SLUS526F – OCTOBER 2002 – REVISED DECEMBER 2006
Selected
State
Write Memory
N
Command?
(0Fh)
Y
Bus Master TransmitsLow Byte Address
(LSB First) AD0 to AD7
Selected
State
Bus Master Transmits High Byte Address
(LSB First) AD8 to AD15
bq2022
Loads Address Into Address Counter
bq2022 Transmits CRC of Write Command
and Address, and then Clears CRC Register
bq2022 Receives 8 Bytes of Data and
Stores in RAM Buffer
bq2022 Transmits
CRC of Previous Received 8 Bytes of Data
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 tEPROG when VPP Vdc on data pin
Voltage on Data ^N
Pin = VPP
Y
bq2022
Increments Address
Counter and Transmits 1
Byte of Data Memory
Indexed by Address Counter
bq2022
Transmits 1 Bytes of Data Memory
at Address Counter
8th Byte
N
Transmitted
Y
NOTE: Individual bytes of address and data are transmitted LSB first.
bq2022 Waits for Reset
(No Further Response)
Figure 9. WRITE MEMORY Command Flow
UDG-02061
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