AK2308LV_05 Datasheet, PDF (3/31 Pages) Asahi Kasei Microsystems – SPEECH CODEC for Digital Key telephone

ASAHI KASEI
[AK2308LV]
PIN CONDITIONS
Pin types;
DIN: Input
DOUT: Output
AIN: Analog Input
AOUT: Analog Output
I/O: Input/ Tri-state output
TOUT: Tri-state output
AOUT: Analog output
PWR: Power supply
Table 1
Pin # _Name
Type
Pin function
Max MIn
Cap load Res load
comment
21 HANDT2
AIN Analog input for handset microphone
19 HANDT3
AIN Analog input for handset microphone
20 HANDT1
AOUT Amplifier output for handset microphone 20pF 5kΩ
26 HANDR
AOUT Analog output for handset receiver
20pF 10kΩ
25 HANDI
AIN Analog input for handset receiver
18 MIC3
AIN Analog input for external microphone
16 MIC2
AIN Analog input for external microphone
17 MIC1
AOUT Amplifier output for external microphone 20pF 5kΩ
24 DAOUT
AOUT Analog output of D/A converter
20pF 8kΩ
27 RAI
AIN Amplifier input for level adjustment
28 RAO
AOUT Amplifier output for level adjustment
20pF 12kΩ
29 SPI
AIN Analog input for speaker
4 SPOP
3 SPON
AOUT Analog output of the speaker driver (+)
AOUT Analog output of the speaker driver (−)
1000pF
between
32Ω
30 TONEI
AIN Input for the external tone signal
11 _DATA
I/O
Serial data I/O for the internal register
access
50pF
12 _SCLK
DIN
Serial data clock for the internal register
access
13 _CSN
DIN
Chip select negative input for the internal
register access
10 DR
DIN RX PCM data serial input
8 DX
TOUT TX PCM data serial output
50pF
9 BCLK
DIN Bit clock input for the PCM I/F
7
FS*
DOUT
8KHz frame
PCM I/F
sync
signal
input
for
the
6 VSS
PWR Power supply for the digital block:0V
5 VDD
PWR Power supply for the digital block: 3.3V
2 AVSS
PWR Power supply for the analog block:0V
15 AVDD
PWR Power supply for the analog block: 3.3V
1
PLLCAP
AOUT
Output to connect
capacitance
the
PLL
loop
filter
1.0uF external
capacitance
23 _RAGND
AOUT Analog ground output for the RX side
1.0uF external
capacitance
22 _VREF
AOUT Voltage reference output
1.0uF external
capacitance
14 TEST
DIN Test pin
Tied to VSS
*FS must be 8kHz clock that is synchronized with BCLK.
MS0227-E-01
3
2005/12