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M30850T2-EPB User’s Manual 2. Setup
REJ10J1005-0200 Rev.2.00 April 1, 2007
IMPORTANT
Notes on Switch JP1:
z If using this product when the voltage of VCC1 is higher than that of VCC2, set the JP1 of the M30850T2-
EPBM to VCC1>2.
z When the JP1 of the M30850T2-EPBM is set to VCC1>2, the voltage of VCC2 on the user system should be
3.3 V or more.
z If using a CPU clock frequency of 30 MHz or more when the voltage of VCC1 is higher than that of VCC2, set
the SFR area of the intelligent I/O function to 2-wait (set the PM13 bit to “1”) when reading this area. This
precaution only needs to be observed when using an emulator, and does not apply for the actual MCU.
IMPORTANT
Notes on Switch SW5:
z When using this product in memory expansion mode or microprocessor mode, be sure to set the all SW5 to ON.
z When setting the register below to use the analog input port selection function, you need to set the direction
register of port P15 for a pin that performs A/D conversion to "input".
And you need to set the function selection register of port P15 for a pin that performs A/D conversion to "I/O
port".
A/D0 control register 2 (address 394h)
b2, b1
1, 0 : AN00 to AN07
1, 1 : AN20 to AN27
Also, when the P0 group and P2 group are selected for A/D input, port P15 cannot be used as an I/O port. When
setting the register above, port P15 cannot be used as an I/O port even if A/D conversion is halting.
z When using the A/D converter in multi-port sweep mode, be sure to set the all SW5 to ON. When setting the
register below to use multi-port sweep mode, you need to set the direction register of port P15 for a pin that
performs A/D conversion to "input".
And you need to set the function selection register of port P15 for a pin that performs A/D conversion to "I/O
port".
A/D0 control register 4 (address 392h)
b3, b2
1, 0 : AN0 to AN7, AN00 to AN07
1, 1 : AN0 to AN7, AN20 to AN27
Also, when the P0 group and P2 group are used for multi-port sweep mode, port P15 cannot be used as an I/O
port. When setting the register above, port P15 cannot be used as an I/O port even if A/D conversion is halting.
z Because a converter board and other devices are used between the evaluation MCU and the user system, the
A/D converter operates differently from an actual MCU. Make the final evaluation of the A/D converter using
an actual MCU.
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