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PCM1870 Datasheet(PDF) 21 Page - Texas Instruments

Part # PCM1870
Description  16-Bit Low-Power Stereo Audio ADC With Microphone Bias and Microphone Amplifier
PDF  52 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

PCM1870 Datasheet(HTML) 21 Page - Texas Instruments

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TWO-WIRE INTERFACE [I
2C, MODE (PIN 28) = HIGH]
9
SDA
SCL
St
Start
1−7
8
1−8
9
1−8
9
Sp
Stop
Slave Address
ACK
DATA
ACK
DATA
ACK
Condition
Condition
R/W
Write Operation
Transmitter
M
M
M
S
S
M
S
M
Data Type
St
Slave Address
R/W
ACK
ACK
DATA
ACK
Sp
R/W:
Read Operation if 1; Otherwise, Write Operation
ACK:
Acknowledgement of a Byte if 0
DATA: 8 Bits (Byte)
T0049-03
M: Master Device
St: Start Condition
M
DATA
Read Operation
Transmitter
M
M
M
S
M
S
M
M
Data Type
St
Slave Address
R/W
ACK
ACK
DATA
NACK
Sp
S
DATA
S: Slave Device
Sp: Stop Condition
PCM1870
SLAS544A – MAY 2007 – REVISED SEPTEMBER 2007
The PCM1870 supports the I2C serial bus and the data transmission protocol for the I2C standard as a slave
device. This protocol is explained in I2C specification 2.0.
In I2C mode, the control terminals are changed as follows.
TERMINAL NAME
PROPERTY
DESCRIPTION
MS/ADR
Input
I2C address
MD/SDA
Input/output
I2C data
MC/SCL
Input
I2C clock
Slave Address
MSB
LSB
1
0
0
0
1
1
ADR
R/W
The PCM1870 has its 7-bit slave address. The first six bits (MSBs) of the slave address are factory preset to
1000 11. The next bit of the address byte is the device select bit, which can be user-defined by ADR terminal. A
maximum of two PCM1870s can be connected on the same bus at one time. Each PCM1870 responds when it
receives its own slave address.
Packet Protocol
A master device must control packet protocol, which is start condition, slave address with read/write bit, data if
write or acknowledgement if read, and stop condition. The PCM1870 supports only slave-receiver and
slave-transmitter.
Figure 20. Basic I2C Framework
Copyright © 2007, Texas Instruments Incorporated
Submit Documentation Feedback
21
Product Folder Link(s): PCM1870



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