Sharp 902SH, Service Manual

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902SH
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CONFIDENTIAL
IC1700 VH+-1L (AK4569): PCM CODEC
Note: Keep the digital input pin connected.
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Pin No. Terminal name Input/Output Description of terminal
1 PDN Input Power down pin
When this pin is set at “L”, the device is powered down internally and reset. When the
power is turned on, input “L” once.
2 CSN Input Control data chip select pin
3 CCLK Input Control clock input pin
4CDTI Input Control data input pin
5 LRCK Input L/R clock pin
Determines an audio data channel
6 MCLK Input Master clock input pin
7 BICK Input Serial bit clock pin
Clock for shifting audio data
8 SDTI Input Audio data input pin
9 SDTO Output Audio data output pin
When PMADC bit = “0”, pin SDTO is DVSS
10 DVDD – Digital power supply pin
11 DVSS – Digital earth pin
12 HVSS – Earth pin for headphone amplifier
13 HVDD – Power supply pin for headphone amplifier
14* HPR Output R-ch HP-Amp output pin (Not used)
When PMHPR bit = “0”, pin HPR is HVSS
15* HPL Output L-ch HP-Amp output pin (Not used)
When PMHPL bit = “0”, pin HPL is HVSS
16 MUTET Output Mute time constant control pin
When PMHPL bit = PMHPR bit = “0”, pin MUTET is HVSS
17* MOUT Output Monaural analogue output pin (Not used)
When PMMO bit = “0”, pin MOUT is Hi-Z
18 MIN Input Monaural analogue input pin
19 RIN Input R-ch analogue input pin
20 LIN Input L-ch analogue input pin
21 VREF Output Reference voltage output pin, 2.1 V (referenced to typ. AVSS)
When PMVCM bit = “0”, pin VREF is AVSS
22 VCOM Output Common voltage pin, 1.25 V (referenced to typ. AVSS)
When PMVCM bit = “0”, pin VCOM is AVSS
23 AVSS – Analogue earth pin
24AVDD – Analogue power supply pin
25 AINR2 Input ADC R-ch analogue input 2 (MIC input)
26 AINL2 Input ADC L-ch analogue input 2 (MIC input)
27 AINR1 Input ADC R-ch analogue input 1 (LINE input)
28 AINL1 Input ADC L-ch analogue input 1 (LINE input)