M306H7MG-XXXFP Datasheet, PDF (164/329 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

M306H7MG-XXXFP/MC-XXXFP/FGFP
12. A/D CONVERTER
fAD
ADTRG
VREF
(VCC2)
AV SS
CKS2=0
1/3
CKS2=1
Software trigger
TRG=0
TRG=1
A/D conversion rate
selection
1/2
1/2
A/D trigger
VCUT=0
VCUT=1
Resistor ladder
CKS0=1
CKS0=0
Successive conversion register _{ADCON1 register}
AD register 0(8)
AD register 1(8)
AD register 2(8)
AD register 3(8)
AD register 4(8)
AD register 5(8)
AD register 6(8)
AD register 7(8)
ADCON0 register
Decoder
for A/D register
CKS1=1
CKS1=0
φ AD
Data bus low-order
ADCON2 register
(address 03D416)
Port P0 group
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
CH2 to CH0
=0002
=0012
=0102
=011 2
=1002
=1012
=110 2
=111 2
Decoder
for channel
selection
Vref
VIN ^Comparator
OPA1 to OPA0=00 2
OPA1 to OPA0=11 2
ANEX0
ANEX1
OPA0=1
OPA1=1
Figure 12.1 A/D Converter Block Diagram
Rev.2.10 Oct 25, 2006 Page 164 of 326
REJ03B0152-0210
OPA1 to OPA0
=012
OPA1=1