
FEDL7204-001DIGEST-01
OKI Semiconductor
ML7204-001
28/42
FUNCTIONAL DESCRIPTION
Transmit and receive buffers
CONFIGURATION EXAMPLES
Configuration Example 1 (Basic Call, CODEC_A)
10k
This example shows the configuration for making calls with an analog telephone set (A-TEL) on the NW side by
connecting the analog telephone interface on the Linear PCM CODEC_A side.
RX_SIG
TXGAINA
RXGAINB
VFRO0
10k
AMP2
AIN0N
GSX0
10k
AIN0P
AMP0
Linear PCM
Codec (CODEC_A)
D/A0
LPF
A/D0
BPF
STGAINA
RXGAINA
VFRO1
10k
AMP3
AIN1N
GSX1
AMP1
Linear PCM
Codec (CODEC_B)
D/A1
LPF
A/D1
BPF
STGAINB
TXGAINB
RXGENA
TXDETA
POWER
DVDD2
DGND2
AGND
DVDD1
DGND1
DVDD0
DGND0
AVDD
VREGOUT
VGB
VREF
AVREF
SYNC (8 kHz)
OSC
12.288 MHz
PLL
X
X
CKGN
MCK
TXDETB
RXGENB
Echo Canceller
+
-
AFF
LPAD
GPAD
ATTs
ATTr
Center
Clip
Sin
Rout
Sout
Rin
CODECB_TXEN
CODECB_RXEN
CODECA_RXEN
CODECA_TXEN
LPEN0
LPEN1
Detector path setting
DTMF_REC
DTMF_CODE[3:0]
DTMF_DET
FSK_DET
FDET_D[7:0]
FDET_RQ
FDET_FER/FDET_OER
TXDETA
TXDETB
TONE_DET0
TONE0_DET
TONE_DET1
TONE1_DET
RXDET
TXGAIN_SC
TXGEN
SC_TXEN
TX
Buffer0
RX
Buffer0
Bus Control
Unit
TX
Buffer1
RX
Buffer1
A0-A7
8b
D0-D15
16b
CSB
RDB
WRB
FR0B
FR1B
Frame/DMA
Controller
Control
Register
INT
SYNC
CLKSEL
BCLK
PCMO
PCMI
DPGEN
DPDET
GPIO0
DP_DET
DTMF_DET
DTMF_CODE[3:0]
GPIO2
TIMER
FDET_FER/FDET_OER
TONE0_DET
TONE1_DET
DP_DET
FDET_RQ
FGEN_FLAG
_CH1
Speech Codec
G.729.A
G.711
Encoder
CH1
CH2
T
S
W
CH2
G.711
T
S
W
G.729.A
Decoder
CH1
RXGAIN
_CH2
PCM I/F
TS
CONT
P/S
S/P
PCM Codec
Encoder
G.711
Decoder
G.711
RXGAIN_ITS2
RXGAIN_ITS1
PCM_TXEN1
TXGAIN_PCM1
RX_SIG
PCM_TXEN0
TXGAIN_PCM0
PCM_RXEN1
RXGAIN_PCM1
RXGAIN PCM0
PCM_RXEN0
RX_SIG
RXDET
RXGAIN_SC
SC_RXEN
DC_EN
DC_EN
RX1T
_GAIN
RX2TX1
RXGEN
Generator path
TONE_GEN1
(TONE C/ D)
FSK_GEN
TONE_GEN0
(TONE A/ B)
TGEN1_EXFLAG
TGEN0_EXFLAG
FGEN_FLAG
RXGEN
TXGEN
RXGENA
RXGENB
RXGENA_EN
RXGENB_EN
G
[
G
[
G
[
4
6
8
INTB/
GPIOA[6]
ACK0B/
GPIOA[4]
ACK1B/
GPIOA[5]
TIMOVF
TIMOVF
T
T
P
C
TXGAIN
_CH1
_CH2
Unused
RXGAIN
EC
Linear
PCM
Codec
(CODEC_B)
Linear
PCM
Codec
(CODEC_A)
Speech
Codec
PCM
I/F
PCM
Codec
MCU
I/F
A-TEL
VoIP-NW
ML7204 (Configuration example 1)