cxa3516r Sony Electronics, cxa3516r Datasheet - Page 39

• Manufacturer Part Number: cxa3516r
• Description: 3-channel 8-bit 165msps A/d Converter Amplifier Pll
• Manufacturer: Sony Electronics

I
2
SDA
SCL
C BUS Mode
Various control can be performed by setting the internal control register values via the serial interface
comprised of the SDA (Pin 9) and SCL (Pin 10). This mode has only a write mode for setting data, and there
is no read mode. Therefore, address "S0" set READ/WRITE is always "0".
Four different kinds of slave address (IC address) can be set by externally setting the ADDRESS (Pin 2) to a
specific voltage.
The pin threshold voltages are set to 1/4V
An 8-bit slave address (IC address), 8-bit sub address, and a number of 8-bit data strings are input in series
from the MSB to the SDA pin. When this IC is used in I
side are set to always "0". ACK signal is returned from the IC to confirm that the data has been received for
each 8-bit data.
The sub address can be designated optionally. The sub address is auto-incremented in order from the
designated sub address, and the data strings are loaded in succession.
To set the data at a specific separated sub address, either send the stop condition and then reset the sub
address, or also send the data of unchanged portions so that the data is continuous. Only auto-increment
mode is supported, and the sub address + data + sub address + data mode where only specific sub addresses
are designated is not supported.
START CONDITION
• START CONDITION
• STOP CONDITION
When SCL pin is high level, the signal input to SDA pin has a falling edge, there is START CONDITION.
When SCL pin is high level, the signal input to SDA pin has a rising edge, there is STOP CONDITION.
SLAVE ADDRESS
ADDRESS pin voltage
SLAVE ADDRESS
MSB
S7
SLAVE ADDRESS
S6 S5 S4 S3 S2 S1 S0
LSB
ACK
S7
A7
0
1
1001 1000
A6
0
SUB ADDRESS
A5
0V
0
A4
CC
S6
A3 A2 A1 A0
0
, 1/2V
1001 1100
1/3V
CC
– 39 –
S5
0
ACK
and 3/4V
CC
2
D7
C bus mode, sub address is 5 bits, and 3 bits of MSB
D6
1001 1110
D5 D4
S4
2/3V
CC
1
DATA
.
D3 D2 D1 D0
CC
S3
1
1001 1010
V
CC
ACK
(5V)
D7
S2
D6
x
D5 D4
DATA
D3 D2 D1 D0 ACK
S1
x
STOP CONDITION
S0
CXA3516R
0