8-Bit A/D Conversion Result Register (Adcrh) - Renesas RL78/G1P Hardware User Manual

16-bit single-chip microcontroller

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9.3.6 8-bit A/D conversion result register (ADCRH)

This register is an 8-bit register that indicate [11:4] bits of ADCR register. The higher 8 bits of 12-bit resolution are

The ADCRH register can be read by an 8-bit memory manipulation instruction.

Reset signal generation clears this register to 00H.

If the A/D conversion result is outside the range specified by using the A/D conversion comparison function

(the value specified by the ADRCK bit of the ADM2 register and ADUL/ADLL registers; see Figure 9-8), the

result is not stored.

Figure 9-10. Format of 8-bit A/D Conversion Result Register (ADCRH)

Address: FFF1FH

Note The ADCRH data (the lower 4 bits of FFF1FH + the higher 4 bits of FFF1EH) is to be read as a FFF1FH address.

When writing to the A/D converter mode register 0 (ADM0), analog input channel specification

may become undefined. Read the conversion result following conversion completion before

writing to the ADM0, ADS, and ADPC registers. Using timing other than the above may cause an

incorrect conversion result to be read.

If INTAD does not occur, the A/D conversion result is not stored in the ADCRH register.

R01UH0895EJ0100 Rev.1.00

Nov 29, 2019

After reset: 00H

CHAPTER 9 A/D CONVERTER