RL78/D1A User's Manual: Hardware - Renesas

Under development
Preliminary document
Specifications in this document are tentative and subject to change.
RL78/D1A CHAPTER 11 A/D CONVERTER
Figure 11-11. Format of Analog Input Channel Specification Register (ADS) (2/2)
Address: FFF31H After reset: 00H R/W
Symbol 7 6 5 4 3 2 1 0
ADS 0 0 0 0 ADS3 ADS2 ADS1 ADS0
Scan mode (ADMD = 1)
ADS3 ADS2 ADS1 ADS0
Analog input channel
Scan 0 Scan 1 Scan 2 Scan 3
0 0 0 0 ANI0 ANI1 ANI2 ANI3
0 0 0 1 ANI1 ANI2 ANI3 ANI4
0 0 1 0 ANI2 ANI3 ANI4 ANI5
0 0 1 1 ANI3 ANI4 ANI5 ANI6
0 1 0 0 ANI4 ANI5 ANI6 ANI7
0 1 0 1 ANI5 ANI6 ANI7 ANI8
Other than the above Setting prohibited
Cautions 1. Be sure to clear bits 4, 5, 6, and 7 to 0.
2. Set a channel to be used for A/D conversion in the input mode by using port mode registers 2, 15
(PM2, PM15).
3. Do not set the pin that is set by the A/D port configuration register (ADPC) as digital I/O by the
ADS register.
4. If using AVREFP as the + side reference voltage source of the A/D converter, do not select ANI0 as
an A/D conversion channel.
5. If using AVREFM as the side reference voltage source of the A/D converter, do not select ANI1 as
an A/D conversion channel.
6. Ignore the conversion result if the corresponding ANI pin does not exist in the product used.
(8) Conversion result comparison upper limit setting register (ADUL)
This register is used to specify the setting for checking the upper limit of the A/D conversion results.
The A/D conversion results and ADUL register value are compared, and interrupt signal (INTAD) generation is
controlled in the range specified for the ADCRK bit of A/D converter mode register 2 (ADM2) (shown in Figure 11-8).
The ADUL register can be set by an 8-bit memory manipulation instruction.
Reset signal generation sets this register to FFH.
Caution When 10-bit resolution A/D conversion is selected, the higher eight bits of the 10-bit A/D conversion
result register (ADCR) are compared with the ADUL register.
Figure 11-12. Format of Conversion Result Comparison Upper Limit Setting Register (ADUL)
Address: F0011H After reset: FFH R/W
Symbol 7 6 5 4 3 2 1 0
ADUL ADUL7 ADUL6 ADUL5 ADUL4 ADUL3 ADUL2 ADUL1 ADUL0
R01UH0317EJ0004 Rev. 0.04 523
Feb. 22, 2013