參數資料
型號： TAS3202PAGR
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝： GREEN, PLASTIC, TQFP-64
文件頁數： 13/66頁
文件大小： 817K
代理商： TAS3202PAGR
SDA
SCL
0
S
Start
(By Master)
Slave Address
(By Master)
0
1
0
1
C
S
0
Read or Write
(By Master)
R
/
W
A
C
K
M
S
B
Acknowledge
(By TAS3202)
L
S
B
Data Byte
(By Transmitter)
A
C
K
Acknowledge
(By Receiver)
M
S
B
L
S
B
Data Byte
(By Transmitter)
A
C
K
Acknowledge
(By Receiver)
S
Stop
(By Master)
MSB
MSB-1 MSB-2
LSB
Start Condition
SDA ↓While SCL = 1
Stop Condition
SDA ↑While SCL = 1
(1)
SLES208B – JUNE 2009 – REVISED MARCH 2011
www.ti.com
6
Microprocessor Controller
The 8051 microprocessor receives and distributes I2C write data, retrieves and outputs to the I2C bus
controllers the required I2C read data, and participates in most processing tasks requiring multiframe
processing cycles. The microprocessor has its own data RAM for storing intermediate values and queuing
I2C commands, a fixed boot-program ROM, and a program RAM. The microprocessor boot program
cannot be altered. The microprocessor controller has specialized hardware for I2C master and slave
interface operation, volume updates, and a programmable interval timer interrupt.
The TAS3202 has a slave-only I2C interface that is compatible with the Inter IC (I2C) bus protocol and
supports both 100-kbps and 400-kbps data-transfer rates for multiple 4-byte write and read operations
(maximum is 20 bytes). The slave I2C control interface is used to program the registers of the device and
to read device status.
The TAS3202 also has a master-only I2C interface that is compatible with the I2C bus protocol and
supports 375-kbps data transfer rates for multiple 4-byte write and read operations (maximum is 20 bytes).
The master I2C interface is used to load program and data from an external I2C EEPROM.
Once the microprocessor program memory has been loaded, it cannot be updated until the TAS3202 has
been reset.
The master and slave I2C ports do not operate simultaneously.
When acting as an I2C master, the data transfer rate is fixed at 375 kHz, assuming MCLK_IN or
XTAL_IN = 24.576 MHz.
When acting as an I2C slave, the data transfer rate is determined by the I2C master device on the bus.
The I2C communication protocol for the I2C slave mode is shown in Figure 6-1.
Figure 6-1. I2C Slave-Mode Communication Protocol
6.1
8051 Microprocessor Addressing Mode
The 256 bytes of internal data memory address space is accessible using indirect addressing instructions
(including stack operations). However, only the lower 128 bytes are accessible using direct addressing.
The upper 128 bytes of direct address Data Memory space are used to access Extended Special Function
Registers (ESFRs).
20
Microprocessor Controller
Copyright 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): TAS3202
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相關代理商/技術參數
參數描述
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