10

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.

• 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

ENDC

IRQX

A/D

16 Cycle

AN0

0000H

AN1

Data 0

AN2

0000H

STOP

Data 2

AN0 conversion

AN1 conversion

AN2 conversion

SCK

SIN

SOT

ENDC

IRQX

A/D

16 Cycle

AN3

0000H

NOP

0000H

NOP

Data 3

AN4

0000H

NOP

0000H

STOP

Data 4

AN3 conversion

AN4 conversion