GMS81508BQ Ver la hoja de datos (PDF) - Hynix Semiconductor
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GMS81508BQ Datasheet PDF : 110 Pages
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GMS81508B/16B/24B, GMS82512/16/24
5. PIN FUNCTION
VDD: Supply voltage.
VSS: Circuit ground.
TEST: Used for Test Mode. For normal operation, it
should be connected to VDD.
RESET: Reset the MCU.
XIN: Input to the inverting oscillator amplifier and input to
the internal main clock operating circuit.
XOUT: Output from the inverting oscillator amplifier.
R00~R07: R0 is an 8-bit CMOS bidirectional I/O port. R0
pins 1 or 0 written to the Port Direction Register can be
used as outputs or inputs.
R10~R17: R1 is an 8-bit CMOS bidirectional I/O port. R1
pins 1 or 0 written to the Port Direction Register can be
used as outputs or inputs.
These pins are NOT served on GMS825xx.
R20~R27: R2 is an 8-bit CMOS bidirectional I/O port. R2
pins 1 or 0 written to the Port Direction Register can be
used as outputs or inputs.
R30~R37: R3 is an 8-bit CMOS bidirectional I/O port. R3
pins 1 or 0 written to the Port Direction Register can be
used as outputs or inputs.
R40~R47: R4 is an 8-bit CMOS bidirectional I/O port. R4
pins 1 or 0 written to the Port Direction Register can be
used as outputs or inputs.
R45, R46, R47 are NOT served on GMS825xx.
In addition, R4 serves the functions of the various follow-
ing special features.
Port pin
R40
R41
R42
R43
R44
R45
R46
R47
Alternate function
INT0 (External interrupt 0)
INT1 (External interrupt 1)
INT2 (External interrupt 2)
INT3 (External interrupt 3)
EC0 (Event counter input 0)
EC2 (Event counter input 2)
T1O (Timer/Counter 1 output)
T3O (Timer/Counter 3 output)
R50~R57: R5 is an 8-bit CMOS bidirectional I/O port. R5
pins 1 or 0 written to the Port Direction Register can be
used as outputs or inputs.
R50~R53, R56, R57 are NOT served on GMS825xx.
In addition, R5 serves the functions of the various follow-
ing special features.
Port pin
R50
R51
R52
R53
R54
R55
R56
R57
Alternate function
SIN (Serial data input)
SOUT (Serial data output)
SCLK (Serial clock)
SRDY (Serial ready)
WDTO (Watchdog Timer output)
BUZ (Buzzer driver output)
PWM0 (PWM output 0)
PWM1 (PWM output 1)
R60~R67: R6 is an 8-bit CMOS bidirectional I/O port. R6
pins 1 or 0 written to the Port Direction Register can be
used as outputs or inputs.
R60~R63 are NOT served on GMS825xx.
In addition, R6 is shared with the ADC input.
Port pin
R60
R61
R62
R63
R64
R66
R66
R67
Alternate function
AN0 (Analog Input 0)
AN1 (Analog Input 1)
AN2 (Analog Input 2)
AN3 (Analog Input 3)
AN4 (Analog Input 4)
AN5 (Analog Input 5)
AN6 (Analog Input 6)
AN7 (Analog Input 7)
Note: On the MDS(Choice-Dr, Jr), when the MCU is RE-
SET, R60 can not be used digital input port. For more detail,
refer to "9. I/O PORTS" on page 34.
AVDD: Supply voltage to the ladder resistor of ADC cir-
cuit. To enhance the resolution of analog to digital convert-
er, use independent power source as well as possible, other
than digital power source.
AVSS: ADC circuit ground.
AVSS is NOT served on GMS825xx but it is connected to
VSS internally.
MAY. 2001 Ver 2.0
11
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