LE24CBK22 Datasheet, PDF (17/20 Pages) Sanyo Semicon Device – Two Wire Serial Interface EEPROM (2K+2K EEPROM)

LE24CBK22
9) Write using a ROM writer in combined mode
This product enters combined mode by setting the COBM pin (Pin 3) low, which allows the two-bank configuration
(2K bits + 2K bits) to be used as a pseudo one-bank configuration (4K bits). This enables write using a ROM writer
in the manner of a typical 4k-bit EEPROM.
LE24CBK22
LE24C04x
(Standard 4K-bit EEPROM)
SCL2 ₁
SDA2 ₂
COBM 3
GND ⁴
8
VDD
7 WP
6 SCL1
5 _SDA1
S0 ₁
S1 2
S2 3
GND 4
8
VDD
7 WP
6
SCL
5 SDA
Pin 3 of standard 4K-bit EEPROM products is assigned a slave pin (S2), but Pin 3 of the LE24CBK22 is assigned the
COBM pin. Combined mode is entered by setting the COBM pin low. In combined mode, the state of the SCL2 pin and
SDA2 pin is "don't care" (may be either high, low, or open).
ROM writer connection example
Connect to GND
level
(don’t care)
SCL2
SDA2
COBM
GND
LE24CBK22
1
8
2
7
3
6
4
5
VDD
WP
SCL1
SDA1
In combined mode:
(From SCL1/SDA1)
1
MSB
Device Code
0
1
Slave
Address
0
SA2
SA1
A8
Device address word
R/W
LSB
In combined mode, the slave address (SA2, SA1) is don't care, and any combination can be entered
(SA2 = 1, SA1 = 1 or SA2 = 1, SA1 = 0 or SA2 = 0, SA1 = 1 or SA2 = 0, SA1 = 0).
No.1514-17/20