MB88111 Datasheet, PDF (9/26 Pages) Fujitsu Component Limited. – A/D Converter (With 24-Channel Input at 10-bit Resolution)

MB88111
(2) Channel select bits
A string of channel select bits selects the pin to be subject to A/D conversion. This bit string is enabled only for
the STC or ATC command.
bc bb ba b9 b8
00000
00001
00010
00011
00100
...
...
...
...
...
01011
01100
01101
01110
01111
Pin to be selected
AN0
AN1
AN2
AN3
AN4
...
AN11
AN12
AN13
AN14
AN15
bc bb ba b9 b8 Pin to be selected
10000
...
...
...
...
...
AN16
...
10111
AN23
11000
11001
11010
1
1
0
1
1 ^{Undefined (*1)}
11100
11101
11110
1
1
1
1
1
Port input AN16 to
AN23 ^(*2)
*1: These settings of the bit string cause the STOP command to be executed.
*2: This setting is enabled only for the STC command. (See Section 5 “Port Input Command.”)
If this setting is made for the ATC command, the STOP command is executed.
2. Data Output Format
Upon completion of A/D conversion, the ENDC pin level becomes “H” and the IRQX pin level becomes “L.”
Execution of serial transfer at this time outputs data in the format illustrated below. The data output timing can
be selected by the MOD pin between the falling edge (mode A) or rising edge (mode B) of the SCK signal.
When the ENDC pin level is “L,” 0000H is output.
MSB
LSB
Bf Be Bd Bc Bb Ba B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Converted data
ENDC A/D converted pin
ENDC (A/D conversion completion flag): This bit is set to “1” upon completion of A/D conversion. It is set to
“0” upon completion of serial transfer.
Note: SCK input upon low-to-high transition of the ENDC pin level should be avoided. Otherwise, data may not
be output correctly.
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