Function Of Certain Mcu Pins - Fujitsu F2MC-16LX Series Application Note

6. Function of certain MCU pins

Pin name
VCC
VSS
C
AVCC
AVSS
AVRL
AVRH
DVCC
HVCC
DVSS
HVSS
X0
X0A
X1
X1A
Pin no. Function
Main supply for IO buffer MCU core
23 close to input the internal 3.3V regulator
84 close to crystal oscillator
Main supply for IO buffer and MCU core
11 close to the internal 3.3V regulator
84 close to crystal oscillator
27 External smooth capacitor for internal 3.3V regulator
output, it is used for supply of the MCU core
Note, that this pin leads the most of noise
34 Power supply for the A/D converter
37 Power supply for the A/D converter
35 Reference voltage input for the A/D converter
36 Reference voltage input for the A/D converter
58 Power supply for the PWM (high current) outputs, it is not
68 connected to VCC,
should be connected to extra power supply
53 Power supply for the PWM (high current) outputs, it is not
63 connected to VSS,
should be connected to extra power supply
82 Oscillator input, if not used so shall be connected with
80 pull-up or pull-down resistor (see please DS)
83 Oscillator output, the crystal and bypass capacitor must
79 be connected via shortest distance with X1 pin,
if not used so shall be open
10