ucb1300 NXP Semiconductors, ucb1300 Datasheet - Page 8

• Manufacturer Part Number: ucb1300
• Description: Advanced Modem/audio Analog Front-end
• Manufacturer: NXP Semiconductors

Philips Semiconductors
The audio sample rate (f
interface using AUD_DIV[n]. The audio sample rate is given by the following equation:
For example, a serial clock of 9.216 MHz, with a divisor of 12, results in an audio sample rate of 24.0 kHz. Both the rising
and the falling edges of SIBCLK are used in case AUD_DIV[n] is set to an odd number, which demands a 50% duty cycle
of SIBCLK to obtain time equidistant sampling.
2000 Jun 26
VSSSPKR
SPKRN
MICP
MICGND
VCCSPKR
SPKRP
f
Advanced modem/audio analog front-end
sa
=
------------------------------------------------- -
64 AUD_DIV[n]
2 f
SIBCLK
AUD_GAIN[4,3]
sa
) is derived from the SIB interface clock pin (SIBCLK) and is programmable through the SIB
(7< AUD_DIV[n] < 128)
AUD_MUTE
AUD_OFF_CAN
Fig.3 Audio codec block diagram.
AUD_ATT[2..0]
AUD_LOOP
8
4-bit DAC
AUD_GAIN[2..0]
AUD_ATT[4,3]
DIGITAL
ATTENUATOR
1-bit ADC
DIGITAL
DECIMATION
FILTER
DIGITAL
NOISE
SHAPER
Product specification
UCB1300
AUD_OUT_ENA
AUD_IN_ENA
12
12