BQ2022_13 Datasheet, PDF (11/20 Pages) Texas Instruments – 1K-BIT SERIAL EPROM WITH SDQ INTERFACE

www.ti.com
bq2022
SLUS526F – OCTOBER 2002 – REVISED DECEMBER 2006
Selected
State
Write Status
N
Command?
(55h)
Y
bq2022 Receives Low Address Byte
(LSB First) AD0 to AD7
Selected
State
bq2022 Receives High Address Byte
(LSB First) AD8 to AD15
bq2022 Loads Address Into Address Counter
bq2022 Receives 1 Bytes of Data
and Stores in RAM Buffer
bq2022 Transmits CRC of Write Status
Command, Address, and Data
bq2022
Calculates and Transmits
CRC of Loaded Address and
Shifted Data
N
Code 5Ah
Y
Received
Contents of RAM buffer AND’ed with contents of
data memory as pointed to by address counter.
Programming time required to be at least
t _EPROG when VPP is applied to the data pin
N
V_DATA = V_PP?
Y
bq2022
Receives Data Byte
bq2022
Transmits Data Byte of
Status Memory Pointed
to by Address Counter
bq2022
Increments Address
Counter and Loads
New Address into CRC
Register
End of Status N
Memory?
Y
bq2022 Waits for Reset
UDG-02064
Figure 11. WRITE STATUS Command Flow
After the programming pulse is applied and the data line returns to V_PU, the host issues eight read time slots to
verify that the appropriate bits have been programmed. The bq2022 responds with the data from the selected
EPROM STATUS address sent least significant bit first. This response should be checked to verify the
Submit Documentation Feedback
11