r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 612

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
Figure 28.1
Timer RD trigger
Timer RC trigger
Software trigger
ADTRG
VREF
AVSS
On-chip reference voltage
fOCO-F
Block Diagram of A/D Converter
f1
ADSTBY = 0
ADSTBY = 1
ADCAP1 to ADCAP0
= 00b
= 01b
= 10b
= 11b
ADDDAEL
(OCVREF)
P1_2/AN10
P1_3/AN11
CKS2 = 0
P0_7/AN0
P0_6/AN1
P0_5/AN2
P0_4/AN3
P0_3/AN4
P0_2/AN5
P0_1/AN6
P0_0/AN7
P1_0/AN8
P1_1/AN9
CKS2 = 1
Note:
CKS0 to CKS2, ADCAP0 to ADCAP1: Bits in ADMOD register
CH0 to CH2, SCAN0 to SCAN1, ADGSEL0 to ADGSEL1: Bits in ADINSEL register
ADEX0, ADSTBY, ADDDAEN, ADDDAEL: Bits in ADCON1 register
OCVREFAN: Bit in OCVREFCR register
fAD
OCVREFAN = 0
OCVREFAN = 1
Trigger
1. When on-chip reference voltage is used as analog input, first set the ADEX0
(Note 1)
bit to 1 (on-chip reference voltage selected) and then set the OCVREFAN bit to
1 (on-chip reference voltage and analog input are connected).
When on-chip reference voltage is not used as analog input, first set the
OCVREFAN bit to 0 (on-chip reference voltage and analog input are cut off)
and then set the ADEX0 bit to 0 (extended analog input pin not selected).
1/2
Analog circuit
CH2 to CH0 = 000b
CH2 to CH0 = 001b
CH2 to CH0 = 010b
CH2 to CH0 = 011b
CH2 to CH0 = 100b
CH2 to CH0 = 101b
CH2 to CH0 = 110b
CH2 to CH0 = 111b
CH2 to CH0 = 000b
CH2 to CH0 = 001b
CH2 to CH0 = 010b
CH2 to CH0 = 011b
AD0 register
AD1 register
AD2 register
AD3 register
AD4 register
AD5 register
AD6 register
AD7 register
Data bus
Successive conversion
register
1/2
1/2
ADGSEL1 to ADGSEL0
ADDDAEN=0
ADDDAEN=1
ADGSEL1 to ADGSEL0
= 00b
= 01b
= 10b
= 11b
CH2 to CH0
CKS1 to CKS0
ADEX0 = 0
ADEX0 = 1
= 01b
SCAN1 to SCAN0
Decoder
= 00b
= 11b
Vref
Vin
φ AD
28. A/D Converter
Comparator
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