Table of Contents
Advertisement
CHAPTER 18 8/10-BIT A/D CONVERTER
18.5
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 18.5-1 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 18.5-2 8/10-bit A/D Converter Interrupts and EI
Interrupt control register
Interrupt No.
Register
name
#31 (1F
)
ICR10
H
❍
: 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.
294
2
OS).
ADCS: INT
ADCS: INTE
Writing the A/D conversion result to the A/D data register
Address
0000BA
H
2
OS function, the 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
FFFF80
FFFF81
H
H
2
EI
OS
Bank
❍
FFFF82
H
Advertisement
Table of Contents
