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

MB88111
3. STC (Standard Conversion) Command
Input of the STC command executes A/D conversion of the specified channel once.
Impletion of A/D conversion, the ENDC signal rises while the IRQX signal falls. Clock input to the SCK pin after
A/D conversion outputs data to the SOT pin. Upon completion of data output, the ENDC signal falls while the
IRQX signal rises. If the next command is STOP or NOP, the A/D conversion is terminated. If the STC command
is input during A/D conversion, the command currently being executed is cancelled and the STC command is
executed.
• Example of STC command execution (1)
STC command input during A/D conversion cancels the current command and executes A/D conversion of the
new specified channel. Output data at this time is 0000H.
SCK
16 Cycle
SIN
AN0
AN1
AN2
STOP
SOT
0000H
Data 0
0000H
Data 2
ENDC
IRQX
A/D
AN0 conversion
AN1 conversion AN2 conversion
• Example of STC command execution (2)
NOP command input during A/D conversion does not affect operation. Output data at this time is 0000H. If A/
D conversion is completed during NOP command input, the ENDC and IRQX pin levels become “H” and “L”
respectively upon completion of the NOP command input.
SCK
SIN
SOT
16 Cycle
AN3
0000H
NOP
0000H
NOP
Data 3
AN4
0000H
NOP
0000H
STOP
Data 4
ENDC
IRQX
A/D
10
AN3 conversion
AN4 conversion