Explanation Of Operation Of 8/10-Bit A/D Converter - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 19 8/10-BIT A/D CONVERTER
19.4

Explanation of Operation of 8/10-bit A/D Converter

Three mode types, the single conversion, continuous conversion, and stop conversion
modes are available for the 8/10-bit A/D converter. The operation explanation in each
mode is done.
Operation of Single-shot Conversion Mode
In single conversion mode, it sequentially converts the analog input on the channels which have been set by
the ANS bit and ANE bit, and when it reaches to the end channel set in ANE bit, it stops the A/D
conversion. When the start channel and the termination channel are same (ANS = ANE), only one channel
specified by the ANS bit is converted. For the operation in the single conversion mode, the setting as
shown in Figure 19.4-1 is necessary.
bit15 bit14 bit13 bit12 bit11 bit10
ADCS
BUSY INT
ADCR
S10
ADMR
ANS3 ANS2 ANS1 ANS0 ANE3 ANE2 ANE1 ANE0
ADER
ADE15 ADE14 ADE13 ADE12 ADE11 ADE10 ADE9
: Used bit
: Set bit corresponding to using pin to "1".
: Set "0"
0
Example of Conversion Order in Single Conversion Mode.
In the case of ANS = "000
In the case of ANS = "011
442
Figure 19.4-1 Setting of Single Conversion Mode
INTE PAUS STS1 STS0
ST1 ST0 CT1 CT0
" and ANE = "011
B
" and ANE = "011
B
bit9 bit8 bit7 bit6 bit5
STRT MD1 MD0
Reserved
Store conversion data
ADE8 ADE7 ADE6 ADE5
": AN0 → AN1 → AN2 → AN3 → termination
B
": AN3 → termination
B
bit4 bit3 bit2 bit1 bit0
Reserved
0
ADE4 ADE3 ADE2 ADE1 ADE0