tda9884 NXP Semiconductors, tda9884 Datasheet - Page 13

• Manufacturer Part Number: tda9884
• Description: Tda9884 I2c-bus Controlled Multistandard Alignment-free If-pll For Mobile Reception
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TDA9884_2
Product data sheet
7.15 Internal voltage stabilizer
7.16 I
Switching to the mute state is controlled automatically, dependent on the digital
acquisition help in case the VCO of the FM-PLL is not in the required frequency window.
This is done by a time constant: fast for switching to the mute state and slow (typically
40 ms) for switching to the no-mute state.
All switching functions are controlled via the I
The band gap circuit internally generates a voltage of approximately 2.4 V, independent of
supply voltage and temperature. A voltage regulator circuit, connected to this voltage,
produces a constant voltage of 3.55 V which is used as an internal reference voltage.
The device can be controlled via the 2-wire I
serial data (SDA) and serial clock (SCL) information between the devices connected to
the I
The device has an I
to clock frequencies of 400 kHz.
A slave address is sent from the master to the slave receiver. To avoid conflicts in a real
application with other devices providing similar or complementing functions, there are four
possible slave addresses available. These Module Addresses (MADs) can be selected by
connecting resistors on pin SIOMAD and/or pins SIF1 and SIF2 (see
Pin SIOMAD relates to bit A0 and pins SIF1 and SIF2 relate to bit A3. The slave
addresses of this device are given in
The power-on preset value is dependent on the use of pin SIOMAD and can be chosen for
45.75 MHz NTSC as default (pin SIOMAD left open-circuit) or 58.75 MHz NTSC (resistor
on pin SIOMAD). In this way the device can be used without the I
device.
Remark: In case of using the device without the I
voltage after switching on power must be longer than 1.2 s.
Table 4.
Slave address
MAD1
MAD2
MAD3
MAD4
2
•
•
•
•
C-bus transceiver and module address
AM sound, FM sound and forced mute
Auto mute enable or disable
De-emphasis off or on with 50 s or 75 s
Audio gain normal or reduced
2
C-bus.
Slave address detection
Selectable address bit
A3
0
0
1
1
2
C-bus slave transceiver with auto-increment. The circuit operates up
Rev. 02 — 12 May 2006
I
2
C-bus controlled multistandard alignment-free IF-PLL
A0
1
0
1
0
Table
4.
2
2
C-bus by a microcontroller. Two wires carry
C-bus:
2
C-bus, then the rise time of the supply
Resistor on pin
SIF1 and SIF2
no
no
yes
yes
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
2
C-bus as an NTSC only
Figure
TDA9884
SIOMAD
no
yes
no
yes
23).
13 of 58