EM78459AM datasheet(35/62 Pages) EMC

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EM78458/459

8-Bit Microcontroller with MASK ROM

Product Specification (V1.4) 05.27.2005

• 29

(This specification is subject to change without further notice)

ADIS2~ADIS0 (bit 2~0):

Analog Input Select.

000 = AN0;

001 = AN1;

010 = AN2;

011 = AN3;

100 = AN4;

101 = AN5;

110 = AN6;

111 = AN7;

Change occurs only when the ADIF bit and the ADRUN bit are both LOW.

4.7.1.2 AD-CMP-CON/IOCA0

The AD-CMP-CON register defines the pins of Port 6 as analog inputs or as digital I/O,

individually.

BIT

SYMBOL

VREFS

COE

IMS2

IMS1

IMS0

CKR1

CKR0

*Init_Value

*Init_Value: Initial value at power on reset

VREFS (Bit 7): The input source of the Vref of the ADC.

0 = The Vref of the ADC is connected to Vdd (default value), and the P53/VREF

pin carries out the function of P53;

1 = The Vref of the ADC is connected to P53/VREF.

CE (Bit 6): Control bit used to enable comparator.

0 = Disable comparator

1 = Enable comparator

COE (Bit 5): Set P57 as the output of the comparator

0 = the comparator acts as an OP if CE=1.

1 = act as a comparator if CE=1.

IMS2~IMS0 (Bit 4 ~ Bit 2): ADC configuration definition bit.

CKR1 and CKR0 (Bit 1 and Bit 0): The conversion time select.

00 = Fosc/4;

01 = Fosc/16;

10 = Fsco/64;

11 = The oscillator clock source of ADC is from WDT ring oscillator frequency.

( frequency=256/18ms 14.2Khz)

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EM78459AM Datasheet(PDF) 35 Page - ELAN Microelectronics Corp

EM78459AM Datasheet(HTML) 35 Page - ELAN Microelectronics Corp

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