upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 232

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(3) A/D conversion result register (ADCR)
232
Symbol
ADCR
Cautions 1. When writing to the A/D converter mode register (ADM) and analog input channel
This register is a 16-bit register that stores the A/D conversion result. The lower six bits are fixed to 0. Each time
A/D conversion ends, the conversion result is loaded from the successive approximation register, and is stored in
ADCR in order starting from the most significant bit (MSB). FF09H indicates the higher 8 bits of the conversion
result, and FF08H indicates the lower 2 bits of the conversion result.
ADCR can be read by a 16-bit memory manipulation instruction.
RESET input makes ADCR undefined.
Address: FF08H, FF09H
2. If data is read from ADCR, a wait cycle is generated. Do not read data from ADCR when the
specification register (ADS), the contents of ADCR may become undefined.
conversion result following conversion completion before writing to ADM and ADS. Using
timing other than the above may cause an incorrect conversion result to be read.
CPU is operating on the subsystem clock and the high-speed system clock is stopped. For
details, see CHAPTER 31 CAUTIONS FOR WAIT.
Figure 12-6. Format of A/D Conversion Result Register (ADCR)
FF09H
After reset: Undefined
CHAPTER 12 A/D CONVERTER
User’s Manual U16962EJ3V0UD
R
0
0
FF08H
0
0
0
Read the
0