Overview; Functions - Panasonic MN101L Series User Manual

Chapter 16
A/D Converter (ADC)

16.1 Overview

This LSI has an analog-to-digital converter (ADC) with 12 bits resolutions. This ADC has a sample hold circuit,
the channel 0 to channel 7 (AN0 to AN7) of analog input can be switched by software.
When the ADC is stopped, the power consumption can be reduced by turning the A/D resistor ladder off.
The ADC is activated by setting a register, an external interrupt, a timer 7 interrupt and an A/D conversion inter-
rupt.
16.1.1

Functions

Table:16.1.1 shows the ADC functions.
This function can not be used in STOP/HALT mode.
.. ..
Do not execute mode switching as follows;
- Normal operation state (NORMAL) to Low-speed operation state (SLOW)
- Low-speed operation state (SLOW) to Idle state (IDLE) to Normal operation state (NOR-
..
MAL)
If the above mode switching is executed, the result of A/D conversion can not be guaranteed.
..
To realize a low power consumption, it is recommended that the A/D resistor ladder is turned
off while the A/D conversion is not executed.
.. ..
XVI - 2 Overview
Table:16.1.1 ADC Functions
Function
Number of A/D Input Pins
Pin Name
Interrupt
Resolution
Conversion Time (Minimum)
Input Range
Power Reduction
Content
8 pins
AN7 to AN0
ADIRQ
12 bits
15.38 µs (at T
= 750 ns)
ADCLK
V to V
SS REFP
A/D resistor ladder (ON/OFF)