BR24L01 Rohm, BR24L01 Datasheet - Page 15

• Manufacturer Part Number: BR24L01
• Description: 1288 bit electrically erasable PROM
• Manufacturer: Rohm

Memory ICs
3) Acknowledge polling
Since the device ignore all input commands during the internal write cycle, no ACK will be returned.
When the master send the next command after the wire command, if the device returns the ACK, it means that the
program is completed. If no ACK id returned, it means that the device is still busy.
By using Acknowledge polling, the waiting time is minimized less than t
In case of operating Write or Current Read right after Write, first, send the slave address (R / W is “HIGH” or “LOW”
respectively). After the device returns the ACK, continue word address input or data output respectively.
S
T
A
R
T
S
T
A
R
T
THE FIRST WRITE COMMAND
WRITE COMMAND
ADDRESS
SLAVE
t
WR
Fig.15 SUCCESSIVE WRITE OPERATION BY ACKNOWLEDGE POLLING
A
C
K
H
BR24L01A-W / BR24L01AF-W / BR24L01AFJ-W /
S
O
P
T
S
T
A
R
T
S
T
A
R
T
ADDRESS
BR24L01AFV-W / BR24L01AFVM-W
SLAVE
ADDRESS
SLAVE
THE SECOND WRITE COMMAND
C
A
K
L
A
C
K
H
WR
ADDRESS
=5ms.
WORD
t
After the internal write cycle
is completed ACK will be returned
(ACK LOW). Then input next
Word Address and data.
WR
During the internal write cycle,
no ACK will be returned.
(ACK HIGH)
S
T
A
R
T
A
C
K
L
ADDRESS
SLAVE
DATA
C
H
A
K
C
A
K
L
O
S
T
P
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