UPD17207GF datasheet(49/120 Pages) NEC

Part #	UPD17207GF

Description	4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS

PDF	120 Pages

Scroll/Zoom	100%

Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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49 / 120 page

µPD17201A, 17207

9.3.2

Internal Reference Voltage Setting Register (ADCR)

The internal reference voltage setting register (ADCR) is an 8-bit register that sets the reference voltage of the

converter. This register is allocated to the peripheral hardware. Data is written to the ADCR via data buffer (DBF).

The 8-bit data set to DBF0 and DBF1 is written to the ADCR by using the “PUT ADCR, DBF” instruction.

9.3.3

Compare Result Register

The result of comparison by the converter is stored to the ADCCMP flag in the register file.

Fig. 9-3 Compare Result Register

RF: address 20H

Bit 3

Bit 2

Bit 1

Bit 0

Read/write

Initial value at reset

ADCCMP

Read = R

[In compare mode]

ADCCMP

Result of comparison

ADC2 voltage < ADC0 voltage

ADC3 voltage < ADC1 voltage

ADC2 voltage

≥ ADC0 voltage

ADC3 voltage

≥ ADC1 voltage

[In A/D conversion mode]

ADCCMP

Result of comparison

ADCn voltage < internal reference voltage

ADCn voltage

≥ internal reference voltage

(n = 0 to 3)

UPD17207GF Datasheet(PDF) 49 Page - NEC