FEBL7731-02-02
1
Semiconductor
User’s Manual for
MSM7731-02 Evaluation Board
- 8 -
4.
HOW TO SET THE OPERATION MODE
There are two modes for controlling the MSM7731-02; the pin control mode that controls
the device through pin settings, the MCU interface mode that controls the device through control register
settings. Not only you can simulate both modes by various switches on this evaluation board but also you
can connect an external microcontroller, which could serve as easy-to-use microcontroller software
development environment.
4.1
Pin Control Mode
(1)
Set all the switches of DSW1 to “0” other than DSW1-5 (NCSEL2).
(2)
Set DSW2-1 (CLKSEL) to “0” when the analog line interface is selected, or when the digital line
interface is selected while SYNC and BCLK are used by internal clocks.
Set DSW2-1 (CLKSEL) to “1” when the digital line interface is selected while SYNC and BCLK are
used by external clocks.
(3) Set DSW2-3 (MCUSEL) to “1” to select the pin control mode.
(4)
Set DSW2-4 (PCMSEL) to “0” when the analog line interface is selected, or when digital line
interface is selected while the 16-bit linear code format is used.
Set DSW2-4 (PCMSEL) to “1” when the digital line interface is selected while the
µ
-law PCM code
format is used.
(5)
Set DSW2-8 (LINEEN) to “0” when the analog line interface is selected.
When the digital line interface is selected, set DSW2-8 (LINEEN) to “1” to power down the line
CODEC.
(6)
See Table 2-1 “DIP Switch Settings” of this document or the “Pin Functional Description” of the
MSM7731-02 Data Sheet for settings of DSW1-5, DSW-2-2, DSW2-5, DSW-2-7, DSW3, and
DSW5.
(7)
Set all the switches of DSW6 to “ON”.
(8)
Connect TP3 to the cellular phone when the digital line interface is selected.
Connect TP5 or J2 and J4 to the cellular phone when the analog line interface is selected.
(9)
TP4 is unused.
(10) Set JP1 and JP2 to “0” when DSW2 (PCMSEL) is set to “0”.
Set JP1 and JP2 to “1” when DSW2 (PCMSEL) is set to “1”.
(11) All toggle switches other than SW1 (PDNRST) and SW10 (RST) are unused.
(12) Apply the DC 12 V power supply to TP1 and connect TP2 to GND.
(13) The MSM7731-02 enters the normal operation mode when SW1 (PDNRST) is executed.
4.2
MCU Interface Mode Using On-board Registers
(1)
Set DSW2-1 (CLKSEL) to “0” when the analog line interface is selected, or when the digital line
interface is selected while SYNC and BCLK are used by internal clocks.
Set DSW2-1 (CLKSEL) to “1” when the digital line interface is selected while SYNC and BCLK are
used by external clocks.
(2)
See Table 2-1 “DIP Switch Settings” of this document or the “Pin Functional Description” of the
MSM7731-02 Data Sheet for setting of DSW2-5 (SYNCSEL).
(3)
Set all the switches of DSW6 to “ON”.
(4)
Set DSW1, DSW2 (other than DSW2-1, DSW2-5), DSW3, DSW4, and DSW5 to “0”.
(5)
Connect TP3 to the cellular phone when the digital line interface is selected.
Connect TP5 or J2 and J4 to the cellular phone when the analog line interface is selected.
(6)
TP4 is unused.
(7)
Set JP1 and JP2 to “0” when CR11-B1 (PCMSEL) is set to “0”.
Set JP1 and JP2 to “1” when CR11-B1 (PCMSEL) is set to “1”.
(8)
Apply the DC 12V power supply to TP1 and connect TP2 to GND.
(9)
Execute SW1 (PDNRST).
(10) Set the CR (Control Register) using SW2 to SW9 and SW14 to SW19 of the MCU control circuit.
See Sections 4-4 and 4-5 for details.
