PCF8570 Philips Semiconductors, PCF8570 Datasheet - Page 12

• Manufacturer Part Number: PCF8570
• Description: 256 x 8-bit static low-voltage RAM with I2C-bus interface
• Manufacturer: Philips Semiconductors

Philips Semiconductors
13.2
The PCF8570 has a fixed combination 1 0 1 0 as group 1, while group 2 is fully programmable (see Fig.12).
13.3
With the condition TEST = V
1999 Jan 06
handbook, full pagewidth
256
I
(1) Power-saving mode without 5 V supply voltage.
(2) Power-saving mode with 5 V supply voltage.
(3) t
2
C-bus interface
SU
Slave address
Power-saving mode
and t
8-bit static low-voltage RAM with
HD1
TEST
SCL
SDA
V DD
I DD
4 s and t
HD2
DD
50 s.
handbook, halfpage
or V
TEST = V DDR
power saving
DDR
t SU
mode (1)
(3)
the PCF8570 goes into the power-saving mode and I
Fig.13 Timing for power-saving mode.
1
group 1
0
Fig.12 Slave address.
1
operating mode
0
t HD1
12
A2
(3)
group 2
A1
A0 R/W
MLB892
TEST = V DD
power saving
t SU
mode (2)
(3)
2
C-bus logic is reset.
t HD2
MLB932
Product specification
(3)
V DD
V DDR
0 V
V DD
V DDR
0 V
V DD
V DDR
0 V
V DD
V DDR
0 V
I DD
I DDS
PCF8570