BR24L01 Rohm, BR24L01 Datasheet - Page 19

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

Memory ICs
7) Connections of A0, A1, A2, WP pin
The minimum value R
Pull up resister of SCL pin
Connections of device address pin (A0, A1, A2)
Connections of WP pin
The minimum value of R
In the case that SCL is controlled by CMOS output, the pull up resister of SCL is not needed.
But in the case that there is a timing at which SCL is Hi-Z, connect SCL to V
Several several dozen k is recommended as a pull up resister, which is considered with the driving ability of the
output port of the controller.
The state of device address PIN are compared with the device address send by the master, then one of the devices
which are connected to the identical bus is selected. Pull up or down these pins, or connect them to V
Pins which is not used as device address (N.C. PIN) may be either HIGH, LOW, and Hi-Z.
The WP input allows or inhibits write operations. When WP is HIGH, only READ is available and WRITE to any
address is inhibited. Both Read and Write are available when WP is LOW.
In the case that the device is used as a ROM, it is recommended that WP is pulled up or connected to V
In the case that both READ and WRITE are operated, WP pin must be pulled down or connected to GND or
controlled.
The type of the device which have N.C. PIN
Meet the condition that V
V
recommended noise margin (0.1 V
Examples : V
OLMAX
V
R
CC
PU
R
(=0.4V) must be lower than the input LOW level of the controller and the EEPROM including
PU
V
V
OLMAX
According to
and
so that condition
V
OL
CC
CC
I
OL
3V, V
I
V
OL
V
PU
OL
IL
PU
OL
0.1V
OLMAX
is determined by following factors.
1
0.4V, I
BR24L01A-W / BR24L01AF-W / BR24L01AFJ-W /
CC
2
=0.4V, I
OL
is met
3mA, the V
CC
R
V
V
OL
IL
PU
).
OLMAX
0.4[V]
0.3 3
0.9[V]
867 [ ]
3 10
3 0.4
=3mA when the device output low on SDA line.
IL
BR24L16 / F / FJ / FV / FVM-W
BR24L08 / F / FJ / FV / FVM-W
BR24L04 / F / FJ / FV / FVM-W
of the controller and the EEPROM is V
3
BR24L01AFV-W / BR24L01AFVM-W
CC
with pull up resister.
A0, A1, A2
A0, A1
A0
IL
0.3V
CC
CC
CC
or GND.
.
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