參數(shù)資料
型號(hào)： uPC1853CT-01
廠商： NEC Corp.
英文描述： MATRIX SURROUND IC WITH I2C BUS
中文描述： 矩陣環(huán)繞集成電路I2C總線
文件頁(yè)數(shù)： 19/76頁(yè)
文件大?。?/td> 544K
代理商： UPC1853CT-01
μ
PC1853
19
Fig. 3-4 Example of Data Transfer in Write Mode
Slave address
D6 D5 D4 D3 D2 D1 D0 W
ACK
Subaddress
D6 D5 D4 D3 D2 D1 D0
ACK
Data
ACK
D7
D6 D5 D4 D3 D2 D1 D0
D7
SDA
SCL
Remark
W: Write mode, ACK: Acknowledge bit
Data is composed of 8 bits. Acknowledge bit is always added after this 8 bits data. Data should be transferred
from MSB first.
The 1 byte immediately after start condition specifies the slave address (chip address). This slave address is
composed of 7 bits.
Table 3-1
is the slave address of the
μ
PC1853. This slave address is registered by Phillips.
Table 3-1 Slave Address of
μ
PC1853
Bias Voltage of ADS (Pin 22)
Slave address
D6
D5
D4
D3
D2
D1
D0
5V
1
0
0
0
1
1
0
GND
1
0
0
0
1
0
0
User can set bit D1 freely.
0: Bias voltage of ADS (pin 22) is GND.
1: Bias voltage of ADS (pin 22) is 5 V.
The remaining 1 bit is the read/write bit which specifies the direction of the data transferred after that. Set “0”
because the
μ
PC1853 has write mode only.
The byte following the slave address is subaddress byte of the
μ
PC1853.
The
μ
PC1853 has 9 subaddresses from SA
0
to SA
8
, and each of them is composed of 8 bits. The data to be set
to the subaddress follows this subaddress byte.
The
μ
PC1853 has automatic increment function. This function increments subaddress automatically in write mode.
By using automatic increment function, once slave address and subaddress are set, data can be transferred
continuously to the next subaddress. Use this function for initializing and so on. In the case of changing the data
continuously of one subaddress (adjustment and so on), set the automatic increment function OFF (see
4.4.1(8)
Automatic increment function
).
3.2.1 1 byte data transfer
The following is the format in the case of transferring 1 byte data.
S
T
A
SLAVE
ADDRESS
W
A
C
K
SUB
ADDRESS
DATA
A
C
K
A
C
K
S
T
P
Remark
STA: Start, W: Write mode, ACK: Acknowledge bit, STP: Stop
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