NEC 78K0 Series User Manual page 311

(3) 8-bit A/D conversion result register (ADCRH)
This register is an 8-bit register that stores the A/D conversion result. The higher 8 bits of 10-bit resolution are
stored.
ADCRH can be read by an 8-bit memory manipulation instruction.
Reset signal generation sets this register to 00H.
Figure 13-7. Format of 8-Bit A/D Conversion Result Register (ADCRH)
Address: FF09H
Symbol
ADCRH
Cautions 1. When writing to the A/D converter mode register (ADM), analog input channel specification
register (ADS), and A/D port configuration register (ADPC), the contents of ADCRH may
become undefined.
writing to ADM, ADS, and ADPC. Using timing other than the above may cause an incorrect
conversion result to be read.
2. If data is read from ADCRH, a wait cycle is generated. Do not read data from ADCRH when
the CPU is operating on the subsystem clock and the peripheral hardware clock is stopped.
For details, see CHAPTER 31 CAUTIONS FOR WAIT.
CHAPTER 13 A/D CONVERTER
After reset: 00H R
7 6 5
Read the conversion result following conversion completion before
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