uc1602i-pp-m ETC-unknow, uc1602i-pp-m Datasheet - Page 17

• Manufacturer Part Number: uc1602i-pp-m
• Description: Single-chip, Ultra-low Power Passive Matrix Lcd Controller-driver
• Manufacturer: ETC-unknow

2-
The 2-wire I
interface. In order to properly communicate
between all I
need to be satisfied.
There are always master and slave devices on
an I
write action to the slave device with an address.
The selected slave device to the action
transimitting or receiving data. Without any action,
the I
Each eight-bit of data is followed by an
acknowledge pulse from the receiver as shown in
Figure 9 . The master device will generate an
extra pulse during this time. It is the receiving
device’s responsibility to generate this
acknowledge pulse regardless of being a master
or slave device. UC1602I generates an
Rev. 0.54 10/12/2001
WIRE INTERFACE TIMING
SDA
SCK
Transmitter
2
2
Receiver
C bus. The master device initiates an read or
C bus are pulled high by two pull-up
Data
Data
SCK
2
2
C interface is a bidirectional
C devices, certain timing protocols
START
S
1
Figure 8 . I
Figure 9 . I
DATA 1
2
C bus SDA and SCK timing relation.
2
2
C bus acknowledge pulse
3
resistors. A master or slave device initiates or
responds to an action by pulling down the bus.
UC1602I is a slave I
In idle mode, the both wires, SDA and SCK are
pulled high. When the SDA makes a HIGH to
LOW transition while SCK remains high, this is
the I
a LOW to HIGH transition while SCK remain low,
this is I
and STOP condition, I
toggling SCK while SDA remains stable. These
relations are shown in Figure 8 .
acknowledge pulse in the write mode. When the
acknowledge pulse is HIGH, UC1602I has
received write instruction or data correctly. When
the acknowledge pulse is LOW, UC1602I has not
correctly received instruction and the master
device needs to resend.
DATA 1
2
C START condition. When the SDA makes
2
C STOP condition. In between a START
65x102 Matrix LCD Controller-Drivers
8
2
C device.
2
No-Acknowledge
DATA 0
C transmits data bits by
Acknowledge
9
STOP
UC1602I
15