EM78P259N/260N

8-Bit Microprocessor with OTP ROM

Bit 3 & Bit 2 (RCM1, RCM0): IRC mode selection bits

RCM 1

 

RCM 0

 

Frequency (MHz)

 

 

 

 

 

 

 

1

1

 

4 (default)

1

0

8

0

1

1

0

0

 

455kHz

6.1.8 R8 (AISR: ADC Input Select Register)

The AISR register individually defines the pins of Port 5 as analog input or as digital I/O.

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

 

 

 

 

 

 

 

 

 

 

 

 

ADE3

ADE2

ADE1

ADE0

 

 

 

 

 

 

 

 

 

Bit 7 ~ Bit 4:

Not used

 

 

 

 

 

Bit 3 (ADE3): AD converter enable bit of P53 pin

 

 

 

 

 

0

= Disable ADC3, P53 functions as I/O pin

 

 

 

 

1

= Enable ADC3 to function as analog input pin

 

 

Bit 2 (ADE2): AD converter enable bit of P52 pin

 

 

 

 

 

0

= Disable ADC2, P52 functions as I/O pin

 

 

 

 

1

= Enable ADC2 to function as analog input pin

 

 

Bit 1 (ADE1): AD converter enable bit of P51 pin

 

 

 

 

 

0

= Disable ADC1, P51 functions as I/O pin

 

 

 

 

1

= Enable ADC1 to function as analog input pin

 

 

Bit 0 (ADE0): AD converter enable bit of P50 pin.

 

 

 

 

 

0

= Disable ADC0, P50 functions as I/O pin

 

 

 

 

1

= Enable ADC0 to function as analog input pin

 

 

10 •

Product Specification (V1.2) 05.18.2007

 

(This specification is subject to change without further notice)

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IBM EM78P259N/260N manual 8 R8 Aisr ADC Input Select Register