MB90560/565 Series
9. 8/10-Bit A/D Converter
• Overview of the 8/10-bit A/D converter
• The 8/10-bit A/D converter uses RC successive approximation to convert analog input voltages to an 8-bit or
10-bit digital value.
• The input signals can be selected from the eight analog input pin channels.
• 8/10-bit A/D converter functions
The minimum conversion time is 6.13 µs (for a 16 MHz machine clock, including sampling
A/D conversion time time) .
The minimum sampling time is 2.0 µs (for a 16 MHz machine clock)
Conversion method RC successive approximation with sample & hold circuit
Resolution
8-bit or 10-bit, selectable
Analog input pins Eight analog input pin channels are available. The input pin can be selected by the program.
An interrupt request can be generated and EI2OS invoked when A/D conversion completes.
Interrupts
The conversion data protection function operates when A/D conversion is performed with
the interrupt enabled.
A/D conversion
start trigger
The conversion start trigger can be set from the following options : software, output of 16-
bit reload timer 1 (rising edge) , or zero detection edge from 16-bit freerun timer.
EI2OS support
Supported by the extended intelligent I/O service (EI2OS) .
• 8/10-bit A/D converter conversion modes
Conversion Mode
Single Conversion Mode Operation Scan Conversion Mode Operation
Sequentially performs one conversion
for multiple channels (up to 8 channels
can be set) , then halts.
Single-shot conversion mode 1 Performs one conversion for the spec-
Single-shot conversion mode 2 ified channel (1 channel) then halts.
Performs repeated conversions for the
specified channels (up to 8 channels
can be set) .
Performs repeated conversions for the
Continuous conversion mode
specified channel (1 channel) .
Sequentially performs one conversion
for multiple channels (up to 8 channels
can be set) , then halts and waits for
the next activation.
Performs one conversion for the spec-
Incremental conversion mode ified channel (1 channel) then halts
and waits for the next activation.
• 8/10-bit A/D converter interrupts and EI2OS
Interrupt Control Register
Vector Table Address
2
Interrupt No.
EI OS
Register Name
Address
Lower
Upper
Bank
#11 (0BH)
: Available
ICR00
0000B0H
FFFFD0H
FFFFD1H
FFFFD2H
50
FUJITSU [ FUJITSU ]
