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3822 Datasheet(PDF) 73 Page - Renesas Technology Corp

Part # 3822
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  328 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

3822 Datasheet(HTML) 73 Page - Renesas Technology Corp

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2.1 I/O pins
APPLICATION
3822 GROUP USER’S MANUAL
2–7
2.1.2 Function pins
Each function pin except I/O ports is described below.
(1) VCC pin and VSS pin
Power source input pins. In the high-speed mode, apply 5.5 V to the VCC pin. In the middle-speed
mode or the low-speed mode, apply 2.5 V to 5.5 V to the VCC pin.
In all modes, apply 0 V to the VSS pin.
(2) VREF pin
The reference voltage input pin for the A-D converter. Apply 2 V to VCC to the VREF pin.
(3) AVSS pin
The GND input pin for the A-D converter. Apply the same voltage as that applied to the VSS pin to
the AVSS pin.
(4) VL1 pin, VL2 pin and VL3 pin
Power source input pins for LCD. Apply 0
V L1
V L2 V L3
V CC of voltage to these pins.
(5) Pins XIN and XOUT
An input pin and an output pin for the main clock generating circuit.
(6) RESET pin
The 3822 group is reset internally by keeping the level of this pin at “L” for 2
µs or more. Reset state
is released by returning the level of this pin to “H”.
(7) Pins SEG0 to SEG11
Segment signal output pins for LCD.
(8) Pins COM0 to COM3
Common signal output pins for LCD.



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