HYUNDAI MicroElectronics
GMS81508B/16B/24B
PIN NAME
VDD
VSS
TEST
RESET
XIN
XOUT
R00~R07
R10~R17
R20~R27
R30~R37
R40 (INT0)
R41 (INT1)
R42 (INT2)
R43 (INT3)
R44 (EC0)
R45 (EC2)
R46 (T1O)
R47 (T3O)
R50 (SIN)
R51 (SOUT)
R52 (SCLK)
R53 (SRDY)
R54 (WDTO)
R55 (BUZ)
R56 (PWM0)
R57 (PWM1)
R60~R63 (AN0~AN3)
R64~R67 (AN4~AN7)
AVSS
AVDD
In/Out
-
-
I
I
I
O
I/O
I/O
I/O
I/O
I/O (I)
I/O (I)
I/O (I)
I/O (I)
I/O (I)
I/O (I)
I/O (O)
I/O (O)
I/O (I)
I/O (O)
I/O (I/O)
I/O (I/O)
I/O (O)
I/O (O)
I/O (O)
I/O (O)
I (I)
I/O (I)
-
-
Function
Basic
Alternate
Supply voltage
Circuit ground
Controls test mode of the chip,
For normal operation, it should be connected at VDD.
Reset signal input
Oscillation input
Oscillation output
8-bit general I/O ports
8-bit general I/O ports
8-bit general I/O ports
8-bit general I/O ports
8-bit general I/O ports
8-bit general I/O ports
External interrupt 0 input
External interrupt 1 input
External interrupt 2 input
External interrupt 3 input
Timer/Counter 0 external input
Timer/Counter 2 external input
Timer/Counter 1 output
Timer/Counter 3 output
Serial data input
Serial data output
Serial clock I/O
Receive enable I/O
Watchdog timer overflow output
Buzzer driving output
PWM pulse output
General input ports
General I/O ports
Ground level input pin for ADC
Supply voltage input pin for ADC
Analog voltage input
Table 5-1 Port Function Description
DEC. 1999 Ver 1.04
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