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MYSON
TECHNOLOGY
MTV212M32
(Rev 1.1)
Revision 1.1
- 5 -
2000/07/04
PIN CONFIGURATION
A “CMOS output pin” means it can sink and drive at least 4mA current. It’s not recommended to use such pin
as input fuction.
A “5V open drain pin” means it can sink at least 4mA current but only drive 10~20uA to VDD. It can be used
as input or output function and need an external pull up resistor.
A “8051 standard pin” is a pseudo open drain pin. It can sink at least 4mA current when output low level, and
drive at least 4mA current for 160nS when output transit from low to high, then keep drive 100uA to maintain
the pin at high level. It can be used as input or output function. It need an external pull up resistor when drive
heavy load device.
8051 Standard Pin
4mA
4mA
Output
Data
Pin
CMOS Output Pin
5V Open Drain Pin
2 OSC
period
delay
4mA
10uA
Output
Data
120uA
Pin
4mA
Input
Data
No Current
4mA
Output
Data
Pin
Input
Data