UM_1922_006 73M1922 Demo Board User Manual
Rev. 5.1 7
2 Connectors
Table 1 shows all the connectors and jumpers available on 73M1922 MicroDAA Demo Board. JS1 is the
main connector for interfacing to a host processor or DSP board. Line monitor/Call progress monitor
speaker and driver circuits are also on board. J1 is a modular connector for phone line connection and J4
is for power connection from the main board or an external power supply.
Table 1: 73M1922 Demo Board Connectors
Schematic and PCB
Reference
Name Description
JS1 3M CONN.
10X2
20-pin connector to interface 73M1922 Demo Board to a
HOST controller main board.
J1 RJ-11 Telephone line connector.
J2 3.3 V supply Plug for connecting external 3.3 V DC power supply.
Table 2: 73M1922 Demo Board Configuration Settings
Schematic and PCB
Reference
Name Description
R54 (20 TSSOP DB), TYPE Frame Sync Type:
0 Ω population: Late FSB (Default for Samsung ARM9
Interface).
None: Early FSB.
R64 (32 QFN DB only) MODE SCLK mode:
0 Ω population: 32 Clock.
None: Continuous SCLK. (Default for Samsung ARM9
Interface)
* NOTE: Due to the package restrictions, the MODE pin is not available in a 20-pin TSSOP package.
And neither the Mode pin nor the TYPE pin is available in 42-pin QFN package. User should choose the
right device option when ordering parts depending on the clock mode (32 clock or continuous) and Frame
sync type (early or late frame sync) required. Refer to the ordering information section of the
73M1822/73M1922 Data Sheet.
Table 3: JS1 Host Interface Connector
PIN Number Name Description PIN Number Name Description
1
NC
11
RINGD Ring Det.out
2
VCC 3.3V power
supply
12
NC
3
NC
13
NC
4
RESET Reset Input
14
NC
5
NC
15
AFEIN Serial Data In
6
NC
16
AFEOUT Serial Data Out
7
NC
17
SCLK Serial Clock
8
NC
18
FS Frame Sync
9
RINGD Ring Det.out
19
NC
10
NC
20
GND Ground
