UPD78F1502AGK-GAK-AX Datasheet, PDF (413/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 10 12-BIT A/D CONVERTER (μ PD78F150xA),
10-BIT A/D CONVERTER (μ PD78F151xA)
<R>
(6) 10-bit A/D conversion result register (ADCR) (μ PD78F151xA only)
This register is a 16-bit register that stores the A/D conversion result in the select mode. The higher 4 bits are fixed to
0. The lower 2 bits are undefined. Each time A/D conversion ends, the conversion result is loaded from the
successive approximation register. The higher 4 bits of the conversion result are stored in FFF1FH and the lower 8
bits are stored in the FFF1EH.
ADCR can be read by a 16-bit memory manipulation instruction.
Reset signal generation clears this register to 0000H.
Figure 10-11. Format of 12-bit A/D Conversion Result Register (ADCR)
Address: FFF1EH, FFF1FH After reset: 0000H R
Symbol
FFF1FH
FFF1EH
ADCR 0
0
0
0
*
*
*: Undefined
Caution When writing to A/D converter mode register (ADM), analog input channel specification register
(ADS), and A/D port configuration register (ADPC), the contents of ADCR may become undefined.
Read the conversion result following conversion completion before writing to ADM, ADS, and ADPC.
Using timing other than the above may cause an incorrect conversion result to be read.
(7) 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 12-bit resolution are stored.
ADCRH can be read by an 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
Figure 10-12. Format of 8-bit A/D Conversion Result Register (ADCRH)
Address: FFF1FH^Note After reset: 00H R
Symbol
FFF1FH
ADCRH 0
0
0
0
FFF1EH
ADCRH
Note If address FFF1FH is read, the data of ADCRH (lower four bits of FFF1FH and higher four bits of FFF1EH) will
be read.
Caution When writing to 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.
Read the conversion result following conversion completion before writing to ADM, ADS, and ADPC.
Using timing other than the above may cause an incorrect conversion result to be read.
R01UH0004EJ0501 Rev.5.01
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Jun 20, 2011