GMS81504 Datasheet, PDF (6/54 Pages) List of Unclassifed Manufacturers – CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

GMS81504
HYUNDAI MicroElectronics
Port Pin I/O
VDD
-
VSS
-
AVDD
-
TEST
I
RESET
I
XIN
I
XOUT
O
R00~R07 I/O
R40/INT0 I/O
R41/INT1 I/O
R42
I/O
R43
I/O
R44/EC0 I/O
R45
I/O
R46/T1O I/O
R47
I/O
R55/BUZ I/O
R56 ¹⁾
I/O
R57 ¹⁾
I/O
R64/AN4 I/O
R65/AN5 I/O
R66/AN6 I/O
R67/AN7 I/O
Descriptions
Primary Functions Secondary Functions
Power supply to MCU -
Ground
-
Power supply for ADC -
Test mode
-
Reset the MCU
-
Oscillation input
-
Oscillation output
-
General I/O
-
General I/O
"
"
"
"
"
"
"
External interrupt 0
External interrupt 1
-
-
External count input 0
-
Timer 1 output
-
General I/O
"
"
Buzzer driving output
-
-
General I/O
"
"
"
Analog input 4
Analog input 5
Analog input 6
Analog input 7
Pull-up/
Pull-down
RESET
-
-
-
-
Pull-up
-
-
-
-
-
-
-
Low
Oscillation
Oscillation
Input ³⁾
Input ³⁾
-
-
Pull-up ²⁾
Pull-up ²⁾
Input ³⁾
Input ³⁾
-
STOP
Mode
-
-
-
-
Last state
Low
High
Last state
Last state
Last state
Last state
NOTES:
1) R56 and R57 are not physically served on 28 pin SOP package.
2) When input mode is selected, pull-up is activated. In output mode, pull-up is de-activated.
3) During MCU reset, status of R56,R57 are weak high (Typ. impedance 50~100KΩ). Other pin impedance is very high(High-Z).
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