M38503MXH Datasheet, PDF (49/86 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Table 13 Description of Pin Function (Flash Memory Parallel I/O Mode)
Pin name
Signal name
I/O
Function
VCC,VSS
Power supply input
I Apply 5.0 ± 0.5 V to the Vcc pin and 0 V to the Vss pin.
CNVSS
CNVSS
I Connect this pin to Vcc.
RESET
XIN
XOUT
Reset input
Clock input
Clock output
I
Reset input pin. When reset is held low, more than 20 cycles of clock are
required at the XIN pin.
I ^{Connect a ceramic or crystal resonator between the XIN and XOUT pins.}
When entering an externally drived clock, enter it from XIN and leave XOUT
O open.
AVSS
Analog power supply input I Connect AVss to Vss.
VREF
Reference voltage input
I _{Input AD reference voltage or keep open.}
P00 to P07
Data I/O D0 to D7
I/O These are data D0–D7 input/output pins.
P10 to P17
Address input A8 to A15
I These are address A8–A15 input pins.
P20 to P27
P 30
Address input A0 to A7
BSEL input
I These are address A0–A7 input pins.
I This is a BSEL input pin.
P 31
RP input
P 32
WE input
I This is a RP input pin.
I This is a WE input pin.
P 33
CE input
P34
OE input
P40
RY/BY output
P41
Input P41
I This is a CE input pin.
I _{This is a OE input pin.}
O This is a RY/BY output pin.
I Enter low signals to this pin.
P42 to P44
Input P4
I Input “H” or “L” or keep open.
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