Fig. 19.2 Block Diagram Of P60/An0 To P67/An7 Pins - Fujitsu MB90420/5 (A) Series Hardware Manual

n Block diagram of pins of port 8-/10-bit A/D Converter
ADER
PDR (port data register)
PDR read
PDR write
DDR (port direction register)
DDR write
DDR read
Notes: • When using a pin as an input port, write 0 to the DDR6 register bit corresponding to the pin and
attach a pull-up resistor to the external pin.
Also, write 0 to the ADER register bit corresponding to the pin.
• When using a pin as an analog input pin, write 1 to the ADER register bit corresponding to the pin.
At this time, the value read from the PDR6 register is 0.
8-/10-BIT A/D CONVERTER
Output latch
Direction latch

Fig. 19.2 Block Diagram of P60/AN0 to P67/AN7 Pins

Analog input
Standby control (SPL = 1)
19-7
Pin