Table of Contents
Advertisement
PIN CONFIGURATION
A ìCMOS output pinî means it can sink and drive at least 4mA current. It is not recommended to use such
pin as input function.
A ìopen drain pinî 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 needs an external pull up resistor.
A ì8051 standard pinî is a pseudo open drain pin. It can sink at least 4mA current when output is at low level,
and drives at least 4mA current for 160nS when output transits from low to high, then keeps driving at 100uA
to maintain the pin at high level. It can be used as input or output function. It needs an external pull up
resistor when driving heavy load device.
2 OSC
period
delay
Output
Data
Output
Data
CMOS Output Pin
POWER CONFIGURATION
The MTV312M can work on 5V or 3.3V power supply system.
In 5V power system, the VDD pin is connected to 5V power and the VDD3 needs an external capacitor, all
output pins can swing from 0~5V, input pins can accept 0~5V input range. And ADC conversion range is 5V.
However, X1 and X2 pins must be kept below 3.3V.
In 3.3V power system, the VDD and VDD3 are connected to 3.3V power, all output pins swing from 0~3.3V,
HSYNC, VSYNC and open drain pin can accept 0~5V input range, other pins must be kept below 3.3V. And
the ADC conversion range is 3.3V.
5V
VDD
VDD3
10u
MTV312M in
5V System
4mA
10uA
4mA
Input
Data
4mA
Pin
4mA
3.3V
--18--
120uA
8051 St andard Pin
Pin
No Current
Input
Data
4mA
Output
Data
Open Drain Pin
VDD
VDD3
MTV312M in
3.3V System
Pin
Advertisement
Table of Contents
