Analog-to-Digital Converter
ADC Setup Examples
Panasonic Semiconductor Development Company MN102H75K/F75K/85K/F85K LSI User Manual
148
Panasonic
AN6BUF (example) x’00FF14’
6.5.2 Setting Up Hardware-Controlled Intermittent Three-Channel A/D Conversion

This example illustrates multiple-channel conversion controlled by the hardware.

The ADIN2, ADIN1, and ADIN0 pins input analog voltage signals ( 0.0 V– 3.3

V) and the ADC converts the voltages to 8-bit digital values. It writes the results

to the registers periodically, each time timer 1 underflows.

Bit:1514131211109876543210
————————
ANn
BUF7 ANn
BUF6 ANn
BUF5 ANn
BUF4 ANn
BUF3 ANn
BUF2 ANn
BUF1 ANn
BUF0
Figure 6-9 Timing of Software-Controlled Single-Channel A/D Conversion
Figure 6-10 Multiple-Channel A/D Conversion
1234 101112
VALID
ADIN6 converting
ANCTR
set
ANEN
State
Reference
clock
AN6BUF
AN6BUF
read
Interrupt
Slider 3Slider 2Slider 1
0
5
10
0
5
10
0
5
10
ch0 ch1 ch2
A/D converter data registers
Underflow
Timer 1
MN102
CPU core
MN102H75
K