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Under
development
Preliminary Specifications REV.B3
Specifications in this manual are tentative and subject to change.
Mitsubishi Microcomputers
M32C/83 group
SINGLE-CHIP 16/32-BIT CMOS MICROCOMPUTER
A-D Converter
290
(1) One-shot mode
In one-shot mode, the pin selected using the analog input pin select bit is used for one-shot A-D conver-
sion. Table 1.24.2 shows the specifications of one-shot mode.
Table 1.24.2. One-shot mode specifications
Item
Specification
Function
The pin selected by the analog input pin select bit is used for one A-D conversion
Start condition
Writing “1” to A-Di conversion start flag, external trigger
Stop condition
End of A-Di conversion (A-Di conversion start flag changes to “0”, except when
external trigger is selected)
Writing “0” to A-D conversion start flag
Interrupt request generation timing
End of A-D conversion
Input pin
One of ANj0 to ANj7 (j =non, 0, 2, 15), ANEX0, ANEX1
Reading of result of A-D converter
Read A-D register corresponding to selected pin
(2) Repeat mode
In repeat mode, the pin selected using the analog input pin select bit is used for repeated A-D conversion.
Table 1.24.3 shows the A-D control register in repeat mode.
Table 1.24.3. Repeat mode specifications
Item
Specification
Function
The pin selected by the analog input pin select bit is used for repeated A-D con-
version
Start condition
Writing “1” to A-D conversion start flag, external trigger
Stop condition
Writing “0” to A-D conversion start flag
Interrupt request generation timing
None generated
Input pin
One of ANj0 to ANj7 (j =non, 0, 2, 15), ANEX0, ANEX1
Reading of result of A-D converter
Read A-D register corresponding to selected pin
(3) Single sweep mode
In single sweep mode, the pins selected using the A-D sweep pin select bit are used for one-by-one A-D
conversion. Table 1.24.4 shows the A-D control register in single sweep mode.
Table 1.24.4. Single sweep mode specifications
Item
Specification
Function
The pins selected by the A-Di sweep pin select bit are used for one-by-one
A-D conversion
Start condition
Writing “1” to A-D converter start flag, external trigger
Stop condition
End of A-Di conversion (A-D conversion start flag changes to “0”, except
when external trigger is selected)
Writing “0” to A-Di conversion start flag
Interrupt request generation timing
End of sweep
Input pin
ANj0 and ANj1 (2 pins), ANj0 to ANj3 (4 pins), ANj0 to ANj5 (6 pins), or ANj0 to ANj7
(8 pins) (j =non, 0, 2, 15)
Reading of result of A-D converter
Read A-D register corresponding to selected pin