Sony Ericsson Developer's Board, Manual, Page: 20 / 28

Developer's Board Manual Rev A Page 20 of 28
SEM/CX-02:0061/MAN
Header X104 is used to set the level for VCC. Jumper the appropriate pins to set the corresponding level:
Pin Numbers VCC (Volts) Resistor Value ( Ω ) Mounted
1-2 6.0 464 Yes
3-4 5.0 360 Yes
5-6 4.0 270 No
7-8 3.3 200 No
Table 10: VCC Header Settings (X104)
The following tables summarize how to correctly configure the developer's board for each module family.
Voltage Levels VCC (Volts) VDIG (Volts)
DM-10/20 6.00 3.3
CM-4x 5.00 2.9
DM-x5/ MM-15 5.00 3.3
Table 11: Voltage levels for each module family
Jumper Setting X103 (VDIG) X104 (VCC)
DM-10/20 1-2 1-2
CM-4x 3-4 3-4
DM-x5/ MM-15 1-2 3-4
Table 12: Jumper settings for each module family
Jumper X101 allows you to select between the regulated VDIG and the VREF signal output by the module to
drive the RS-232 Level shifters.
X101 Function
1-2 VDIG supplied by regulator.
2-3 VDIG supplied by module. (CM-4x family only)
Table 13: VREF Header Settings (X101)
3.4 Operation Mode
Serial communication between the target module and the RS-232 level shifters is easily enabled/disabled via dip
switches (S3). This allows testing of flow control (HW or None). This feature also allows the connection of your
application's serial interface to the module while providing other connections, such as power, through the
developer's board.
Switch Signal ON OFF
Position 1 DTMS Normal Operation If External application is directly connected
to System Connector Header
Position 2 CTS HW Flow Control enable If External application is directly connected
to System Connector Header
Position 3 DTR Normal Operation If External application is directly connected
to System Connector Header
Position 4 DFMS Normal Operation If External application is directly connected
to System Connector Header
Position 5 RTS HW Flow Control enable If External application is directly connected
to System Connector Header
MODULE_PWR_EN_B Position 6
WAKE
Signal is grounded
(Logic Low) Signal is floating
(Logic High)
Table 14: Description of Operation Mode Switch Settings
When switches 1 through 5 are in the OFF position, they are disconnected from the level shifters on the
developer's board. Hence the module determines the state of the signal at the System Connector Header. Refer
to the appropriate Integrator's Manual for a description of the signals.