25 A/D CONVERTER (ADC10)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
25-1
A/D Converter (ADC10)
25
ADC10 Module Overview
25.1
The S1C33L26 incorporates an A/D converter with the following features:
• Conversion method:
Successive approximation type
• Resolution:
10 bits
• Input channels:
Max. 6 channels
• A/D conversion clock:
Max. 2 MHz
• Sampling rate:
Max. 100 ksps
• Analog input voltage range:
V
SS
to AV
DD
• Sampling & hold circuit included
• Supports two conversion modes:
One-time conversion mode
(for single channel or multi-channels)
Continuous conversion mode
(for single channel or multi-channels, terminated with software)
• Supports three conversion triggers:
Software trigger
External trigger (input from the #ADTRIG pin)
T8 Ch.2 underflow trigger
• The conversion results can be read as 16-bit data with the 10-bit converted data aligned to left or right.
• Two types of interrupts can be generated: Conversion completion interrupt
Conversion data overwrite error interrupt
Figure 25.1.1 shows the A/D converter configuration.
Bus I/F
and
control
registers
Interrupt request
Trigger signals
ADC10
External trigger
Successive
approximation
control circuit
D/A
converter
Internal data bus
AV
DD
#ADTRIG
Multi-
plexer
AIN5
AIN4
AIN3
AIN2
AIN1
AIN0
+
–
PCLK1/2–PCLK1/32K
Prescaler
T8 Ch.2
ITC
1.1 A/D Converter Configuration
Figure 25.