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M38B4XMXH Datasheet(Fiches technique) 3 Page - Mitsubishi Electric Semiconductor

Numéro de pièce M38B4XMXH
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER   
Télécharger  78 Pages
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Fabricant  MITSUBISHI [Mitsubishi Electric Semiconductor]
Site Internet  http://www.mitsubishichips.com
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M38B4XMXH Datasheet(HTML) 3 Page - Mitsubishi Electric Semiconductor

 
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38B4 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PIN DESCRIPTION
Table 1 Pin description (1)
Pin
Name
Function
VCC, VSS
Power source
• Apply voltage of 4.0–5.5 V to VCC
, and 0 V to VSS.
VEE
Pull-down
• Apply voltage supplied to pull-down resistors of ports P0, P1, and P3.
power source
VREF
Reference
• Reference voltage input pin for A-D converter.
voltage
AVSS
Analog power
• Analog power source input pin for A-D converter.
source
• Connect to VSS.
RESET
Reset input
• Reset input pin for active “L”.
XIN
Clock input
• Input and output pins for the main clock generating circuit.
• Feedback resistor is built in between XIN pin and XOUT pin.
• Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins to set the
oscillation frequency.
• When an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.
• The clock is used as the oscillating source of system clock.
P00/FLD8
I/O port P0
• 8-bit I/O port.
• FLD automatic display
P07/FLD15
• I/O direction register allows each pin to be individually programmed as either
pins
input or output.
• At reset, this port is set to input mode.
• A pull-down resistor is built in between port P0 and the VEE pin.
• CMOS compatible input level.
• High-breakdown-voltage P-channel open-drain output structure.
• At reset, this port is set to VEE level.
P10/FLD16– Output port P1
• 8-bit output port.
• FLD automatic display
P17/FLD23
• A pull-down resistor is built in between port P1 and the VEE pin.
pins
• High-breakdown-voltage P-channel open-drain output structure.
• At reset, this port is set to VEE level.
P20/BUZ02/
I/O port P2
• 8-bit I/O port with the same function as port P0.
• FLD automatic display
FLD0
• Low-voltage input level.
pins
P27/FLD7
• High-breakdown-voltage P-channel open-drain output structure.
• Buzzer output pin (P20)
P30/FLD24– Output port P3
• 8-bit output port.
• FLD automatic display
P37/FLD31
• A pull-down resistor is built in between port P3 and the VEE pin.
pins
• High-breakdown-voltage P-channel open-drain output structure.
• At reset, this port is set to VEE level.
P40/INT0,
I/O port P4
• 7-bit I/O port with the same function as port P0.
• Interrupt input pins
P41/INT1,
• CMOS compatible input level
In the mask option type P,
P42/INT3
• N-channel open-drain output structure.
INT3 cannot be used.
P43/BUZ01
• Buzzer output pin
P44/PWM1
• PWM output pin
(Timer output pin)
P45/T1OUT,
• Timer output pin
P46/T3OUT
P47/INT2
Input port P4
• 1-bit input port.
• Interrupt input pin
• CMOS compatible input level.
Function except a port function
XOUT
Clock output


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