TDA8416 Datasheet, PDF (8/19 Pages) NXP Semiconductors – TV and VTR stereo/dual sound processor with integrated filters and I2C-bus control

Philips Semiconductors
TV and VTR stereo/dual sound processor
with integrated filters and I²C-bus control
Preliminary specification
TDA8416
Control ports
The general purpose control ports C1 and C2 can be set to LOW, HIGH or high impedance via the I²C-bus.
I² C-bus receiver and data handling
Bus specification
The TDA8416 is controlled, via the bidirectional 2-line I² C-bus, by a microcomputer. The two lines are a serial data line
(SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor. Data transfer
may be initiated only when the bus is not busy.
When the bus is free both lines are HIGH. The data on the SDA line must be stable during the HIGH period of the clock.
The HIGH or LOW state of the data line can only change when the clock signal on the SCL line is LOW. The set up and
hold times are specified in the CHARACTERISTICS.
A HIGH-to-LOW transition of the SDA line while SCL is HIGH is defined as the start condition (S). A LOW-to-HIGH
transition of the SDA line while SCL is HIGH is defined as the stop condition (P). The bus receiver will be reset on the
reception of a start condition. The bus is considered to be busy after the start condition. The bus is considered to be free
again after a stop condition.
The I² C-BUS PROTOCOL OF THE TDA8416
The TDA8416 is controlled by a microcomputer and can be written to or read from via the I² C-bus.
The first byte is the address and determines whether the TDA8416 is to be read from (status register) or written to (switch
register or mute and port control register).
Read from (TDA8416 is a slave transmitter)
Write to (TDA8416 is a slave receiver)
Where:
S = start bit
A = acknowledge bit
MAD = module address bit
The MAD input (pin 20) allows the TDA8416 to operate from two different addresses:
MAD = LOW = > A3 = A4 = 0 − > slave address = 1000 010
MAD = HIGH = > A3 = A4 = 1 − > slave address = 1011 010
Fig.4 Address byte.
November 1989
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