8/10-Bit A/D Converter Pins - Fujitsu MB90460 Series Hardware Manual

CHAPTER 20 8/10-BIT A/D CONVERTER
20.3

8/10-bit A/D Converter Pins

This section describes the 8/10-bit A/D converter pins and provides pin block diagrams.
■ 8/10-bit A/D Converter Pins
The A/D converter pins are also used as general ports. Table 20.3-1 lists the pin functions, I/O formats, and
settings required to use the 8/10-bit A/D converter.
Table 20.3-1 8/10-bit A/D Converter Pins
Function Pin name
Channel 0 P50/AN0
Channel 1 P51/AN1
Channel 2 P52/AN2
Channel 3 P53/AN3
Channel 4 P54/AN4
Channel 5 P55/AN5
Channel 6 P56/AN6
Channel 7 P57/AN7
■ Block Diagrams of the 8/10-bit A/D Converter Pins
ADER
Port data register (PDR)
PDR read
PDR write
Port data direction register (DDR)
DDR write
DDR read
546
Input-output
Pin function
Port 5 input/
output/CMOS
output or
hysteresis input or
analog input
Figure 20.3-1 Block Diagram of the P50/AN0 to P57/AN7 Pins
Output latch
Direction latch
Pull-up
signal type option
CMOS
Not
selectable
analog input
Standby control (SPL = 1)
Standby I/O port setting for
control using the pin
Set port 5 as an input port
(DDR5: bit8 to bit15 = 0).
Not
Set port 5 as an analog
selectable
input port (ADER: bit8 to
bit15 = 1)
Analog input
Pin