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Chapter 11
A/D Converter
User’s Manual U16702EE3V2UD00
11.3 Control
Registers
The A/D converter is controlled by the following registers.
•
A/D conversion result register n (ADA0CRn, ADA0CRDD, ADA0CRSS)
•
A/D converter mode registers 0, 1 (ADSCM0H, ADSCM0L, ADSCM1H)
•
A/D converter extended mode control register 0 (ADVMS0)
•
A/D converter external trigger control register (SELCNT1)
(1)
A/D conversion result register n (ADA0CRn, ADA0CRDD, ADA0CRSS)
The ADA0CRn register is a 16-bit register that stores the A/D conversion result. ADA0CRn consist
of 16 registers and the A/D conversion result is stored in the 10 lower bits of the register
corresponding to analog input. The upper 6 bits are fixed to 0.
The ADA0CRn register is read with a 16-bit memory manipulation instruction. RESET input clears
this register to 0000H.
Caution:
A write operation to A/D converter mode register 0 (ADSCM0) and A/D converter
mode register 1 (ADSCM1) may cause the contents of the ADA0CRn register to
become undefined. After the conversion, read the conversion result before
performing write to the ADSCMn registers. Correct conversion results may not be
read if a sequence other than the above is used.
Figure 11-2:
A/D Conversion Result Register n
(ADA0CRn, ADA0CRDD, ADA0CRSS) Format (1/2)
(a) After RESET: ADA0CRn = 0000H (n= 0 to 15), Read only registers
Symbol
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Address
ADA0CR0
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF220H
ADA0CR1
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF222H
ADA0CR2
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF224H
ADA0CR3
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF226H
ADA0CR4
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF228H
ADA0CR5
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF22AH
ADA0CR6
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF22CH
ADA0CR7
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF22EH
ADA0CR8
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF230H
ADA0CR9
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF232H
ADA0CR10
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF234H
ADA0CR11
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF236H
ADA0CR12
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF238H
ADA0CR13
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF23AH
ADA0CR14
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF23CH
ADA0CR15
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF23EH
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