EKTF6708 datasheet(49/158 Pages) EMC

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eKTF6708

8-Bit Microcontroller

IC Product Specification (V1.2) 03.12.2020

 39

(This specification is subject to change without prior notice)

VREFP[1:0]

Reference Voltage Selection

VDD

Internal VREF*

External VREF(Pin)

NOTE

When using internal voltage reference, users need to wait 35us at least the first time to

enable and stabilize the internal voltage reference circuit. After that, users need to wait

1500us(Low pass filter stable time) at least then set ADLPFEN enable, whenever

switching voltage references.

6.1.49 Bank 0 R40: ADISR (Analog to Digital Converter Input Channel

Selection Register)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

ADIS1

ADIS0

R/W

Bits 7~2: Not used, set to "0" all the time.

Bits 3~0 (ADIS4~0): ADC input channel selection bits

ADIS[1:0]

Selected Channel

ADC0

ADC1

1x*

Internal Voltage Reference(VDD PowerDet. )

Note:

*: For internal signal source use. Users only need to set ADIS1=1, these AD input channels

are active instantly Reference Voltage, internal Vref stable time 35 µs.

6.1.50 Bank 0 R41: ADER1 (Analog to Digital Converter Input Control

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

ADE1

ADE0

R/W

Bits 7~2: Not used, set to "0" all the time.

Bit 1 (ADE1): AD converter enable bit of P71 pin.

0: Disable ADC1, P71/AD1 act as I/O pin

1: Enable ADC1, act as analog input pin.

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