GMS81C2020 Datasheet, PDF(14/92 Page) Hynix Semiconductor – CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver

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GMS81C2020 Datasheet, PDF (14/92 Pages) Hynix Semiconductor – CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver

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GMS81C2020/GMS81C2120

Hyundai Micro Electro nics

PIN NAME

VDD

VSS

RA (Vdisp)

RESETB

R00 (INT0)

R01 (INT1)

R02 (EC0)

R03 (BUZO)

R04~R07

R20~R27

R30~R34

R53 (SCLK)

R54 (SIN)

R55 (SOUT)

R56 (PWM1O/T1O)

R57

R60~R67 (AN0~AN7)

AVDD

AVSS

In/Out

I(I)

I/O (I)

I/O (O)

I/O

I/O (I/O)

I/O (I)

I/O (O)

I/O

I/O (I)

PIN DESCRIPTIONS (GMS81C2120)

Function

Supply voltage

Circuit ground

1-bit high-voltage Input only port High-voltage input power supply pin

Reset signal input

Oscillation input

Oscillation output

External interrupt 0 input

External interrupt 1 input

8-bit high-voltage I/O ports

Timer/Counter 0 external input

Buzzer driving output

8-bit high-voltage I/O ports

5-bit high-voltage I/O ports

5-bit general I/O ports

Serial clock source

Serial data input

Serial data output

PWM 1 pulse output /Timer/Counter 1 output

8-bit general I/O ports

Supply voltage input pin for ADC

Ground level input pin for ADC

Analog voltage input

preliminary

Nov. 1999 Ver 0.0

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