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CHAPTER 20 8/10-BIT A/D CONVERTER
20.5
8/10-bit A/D Converter Interrupts
The 8/10-bit A/D converter can generate an interrupt request when the data for the A/D
conversion is set in the A/D data register. This function supports the extended
intelligent I/O service (EI
■ 8/10-bit A/D Converter Interrupts
Table 20.5-1 indicates the interrupt control bits of the 8/10-bit A/D converter and the interrupt cause.
Table 20.5-1 Interrupt Control Bits of the 8/10-bit A/D Converter and the Interrupt Cause
Interrupt request flag bit
Interrupt request enable bit
Interrupt cause
When A/D conversion is performed and its result is set in the A/D data register (ADCR), the INT bit of the
A/D control status register (ADCS1) is set to "1". If the interrupt request is enabled (ADCS1: INTE = 1),
an interrupt request is output to the interrupt controller.
■ 8/10-bit A/D Converter Interrupts and EI
Table 20.5-2 8/10-bit A/D Converter Interrupts and EI
Interrupt control register
Interrupt no.
Register
name
#11 (0B
)
ICR00
H
O: Available
2
■ EI
OS Function of the 8/10-bit A/D Converter
Using the EI
When the transfer is performed, a conversion data protection function halts the A/D conversion until the A/D
conversion data is transferred to memory, and clears the INT bit. The function prevents any part of the data
from being lost.
556
2
OS).
ADCS1: INT
ADCS1: INTE
Writing the A/D conversion result to the A/D data register
Address
0000B0
H
2
OS function, the 8/10-bit A/D converter can transfer the A/D conversion result to memory.
8/10-bit A/D converter
2
OS
2
OS
Vector table address
Lower
Upper
FFFFD0
FFFFD1
H
Bank
FFFFD2
H
H
EI²OS
O
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