M38503MXH Datasheet, PDF (56/86 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table 16 Pin functions (Flash memory standard serial I/O mode)
Pin
Name
I/O
Description
VCC,VSS
Power input
Apply program/erase protection voltage to Vcc pin and 0 V to Vss pin.
CNVSS
RESET
XIN
XOUT
CNVSS
Reset input
Clock input
Clock output
I Connect to VCC when VCC = 4.5 V to 5.5 V.
Connect to Vpp (=4.5 V to 5.5 V) when VCC = 2.7 V to 4.5 V.
I Reset input pin. While reset is “L” level, a 20 cycle or longer clock
must be input to XIN pin.
I ^{Connect a ceramic resonator or crystal oscillator between XIN and}
XOUT pins. To input an externally generated clock, input it to XIN pin
O and open XOUT pin.
AVSS
VREF
P00 to P07
Analog power supply input
Connect AVSS to VSS .
Reference voltage input
I Enter the reference voltage for AD from this pin.
Input port P0
I Input “H” or “L” level signal or open.
P10 to P17
Input port P1
I Input “H” or “L” level signal or open.
P20 to P23
Input port P2
P24
RxD input
P25
TxD output
P26
SCLK input
P27
BUSY output
P30 to P34
Input port P3
P40, P42 to P44 Input port P4
P41
Input P41
I Input “H” or “L” level signal or open.
I Serial data input pin
O Serial data output pin
I Serial clock input pin
O BUSY signal output pin
I Input “H” or “L” level signal or open.
I Input “H” or “L” level signal or open.
I Input “H” level signal, when reset is released.
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