Sound Generator - Hitachi SH7760 Solution Engine2 Overview

5.5 Sound Generator

5.5.1 Block Description
Figure 5.8 shows the sound generator control block. As shown in Figure 5.8, this control block contains an
SH7760 internal serial sound interface (SSI) and an audio CODEC (UDA1342TS from Phillips) so that sound can
be output to headphones connected to an output mini-jack (CN9) or it can be input to earphones connected to an
I/O mini-jack (CN10). In addition, headphone output takes place with the quality of stereo output while earphone
I/O takes place with the quality of monaural I/O that uses only the Rch.
This control block is connected to an electronic volume so that sound output volume can be controlled via the
generator. The electronic volume is controlled by the power supply controller. For details, refer to 6. "Power
Supply Controller." In addition, Solution Engine2 has the following characteristics for microphone input and
headphone output:
- Microphone input
Impedance: 2.2KO
Sensitivity: -51dB/Pa
- Headphone output
Impedance: 32O
For more details, refer to the pertinent SH7760 Hardware Manual and Phillips UDA1342TS Manual.
Phillips Homepage: http://www.semiuconductors.phillips.com
SH7760
IIS Ch0
SDATA
SCK
WS
CLK
IIS Ch1
SDATA
SCK
WS
CLK
I2C Ch0
SCL
SDA
DATAO
BCK
WS
DATAI
SYSCLK
L3CLOCK
L3DATA
22.5792MHz
OSC4
Figure 5.8 Sound Generator Control Block
42
Audio CODEC
(UDA1342TS)
Rch output
Lch output
Rch input Amplifier
Electronic
Sound
output
mini-jack
(CN9)
Rch
Lch
Sound I/O
mini-jack
(CN10)
volume
Power supply controller
(H8/3048F-ONE)