NEC PD17062 Manuale Utente

µ

CE is a flag for reading the CE pin level.

The flag indicates 1 when a high level signal is input to the CE pin, or 0 when a low level signal is input.

b

3

b

2

b

1

b

0

0

0

CE

07H

0

1

0

CE pin low level

CE pin high level

b

3

b

2

b

1

b

0

SIO0CH

SB

SIO0TX

08H

0

1

SIO0MS

0

1

0

1

0

1

Transmission/reception setting

Setting of serial interface clock direction

Setting of serial interface mode

Setting of serial interface channel

2-wire bus mode
CH0 serial I/O mode
CH1 serial I/O mode

:  RX (reception) mode
:  SI mode
:  P0A

3

 used as a general-purpose port

2-wire bus mode
CH0 serial I/O mode
CH1 serial I/O mode

:  TX (transmission) mode
:  SO mode
:  P0A

3

 used as an SO pin

2-wire bus mode
Serial I/O mode

:  Slave operation
:  External clock operation

2-wire bus mode
Serial I/O mode

:  Master operation
:  Internal clock operation

Serial I/O mode

2-wire bus mode

Selects CH0

Selects CH1