Motorola MTR2000 Manual page 144

2-WIRE VOICE SIGNAL PATHS
P/O
LINE CONNECTOR
ON
STATION BACKPLANE
LINE 2 AUDIO
FROM STATION TO LANDLINE
AND
FROM LANDLINE TO STATION
4-WIRE VOICE SIGNAL PATHS
P/O
LINE CONNECTOR
ON
STATION BACKPLANE
LINE 1 AUDIO
FROM LANDLINE
TO STATION
P/O
LINE CONNECTOR
ON
STATION BACKPLANE
LINE 2 AUDIO
FROM STATION
TO LANDLINE
LANDLINE TO STATION VOICE AUDIO PATH
PRE-EMPHASIS/
AMPLIFIER
–
BUFFER
+
SPI LATCH BIT 0
SPI LATCH BIT 2 SPI LATCH BIT 1
LINE DRIVER
+
LOW-PASS
–
STATION TO LANDLINE VOICE AUDIO PATH
LINE DRIVER
–
+
TTN5067B 2-WIRE VOICE AUDIO PATH FUNCTIONAL BLOCK DIAGRAM
LANDLINE TO STATION VOICE AUDIO DATA PATHS
PRE-EMPHASIS/
GAIN ADJUST
AMPLIFIER
AMPLIFIER
BUFFER
SPI LATCH BIT 0
SPI LATCH BIT 2
SPI LATCH BIT 1
LINE DRIVER
+
–
2-POLE
LOW-PASS
LINE DRIVER
FILTER
–
+
STATION TO LANDLINE VOICE AUDIO DATA PATHS
SPI LATCH
PCM
CODEC/
SPI LATCH BITS – 7 6 5 4 3 2 1 0
GAIN ADJUST
AMPLIFIER
DE-EMPHASIS
CONVERTER
SPI LATCH BIT 4/5
2-POLE GAIN
ADJUST
FILTER CIRCUITRY
CONVERTER
HIGH-PASS
FILTER
PCM CODEC/
FILTER
DE-EMPHASIS
A/D
CONVERTER
SPI LATCH BIT 4/5
D/A
CONVERTER
VOICE
GAIN
ADJUST
CIRCUITRY
3-POLE
LOW-PASS
FILTER
SPI LATCH BIT 3
WL 1 LATCH CS*
MOSI/SPI CLK
SPI LATCH
SPI LATCH BITS – 7 6 5 4 3 2 1 0
TTN5067B 4-WIRE VOICE AUDIO DATA PATH FUNCTIONAL BLOCK DIAGRAM
4-WIRE WIB MODULE
MODEL TTN5067B
WL 1 LATCH CS*
SPI BUS/ CHIP
SELECT FROM
MOSI/SPI CLK
SCM
PCM VOICE
AND DATA
TO SCM
A/D
PCM VOICE
AND DATA
FROM SCM
D/A
SERIAL
DATA TO SCM
PCM VOICE
AND DATA
TO SCM
PCM VOICE
AND DATA
FROM SCM
SERIAL DATA
FROM SCM
SPI BUS/ CHIP
SELECT FROM
SCM
68P81094E28-C
Functional B D (Sheet 1 of 8)
03/26/99