M16C80 Datasheet, PDF (178/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
21. A/D Converter
fAD
VREF
AVSS
VCUT=0
VCUT=1
CKS0=1
1/2
1/2
CKS0=0
Resistance ladder
CKS1=1
φAD
CKS1=0 ^{A/D conversion rate}
selection
Successive conversion register
A/D control register 1 (address 039716)
A/D control register 0 (address 039616)
Addresses
(038116, 038016)
(038316, 038216)
(038516, 038416)
(038716, 038616)
(038916, 038816)
(038B16, 038A16)
(038D16, 038C16)
(038F16, 038E16)
A/D register 0(16)
A/D register 1(16)
A/D register 2(16)
A/D register 3(16)
A/D register 4(16)
A/D register 5(16)
A/D register 6(16)
A/D register 7(16)
Vref
Decoder
VIN ^Comparator
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Data bus high-order
Data bus low-order
CH2,CH1,CH0=000
CH2,CH1,CH0=001
CH2,CH1,CH0=010
CH2,CH1,CH0=011
CH2,CH1,CH0=100
CH2,CH1,CH0=101
CH2,CH1,CH0=110
CH2,CH1,CH0=111
ANEX0
ANEX1
OPA0=1
OPA1=1
Figure 21.1 Block diagram of A/D converter
Rev.1.00 Aug. 02, 2005 ^{Page 167} of 329
REJ09B0187-0100
OPA1,OPA0=0,0
OPA1,OPA0=1,1
OPA1,OPA0=0,1
OPA1, OPA0
0 0 : Normal operation
0 1 : ANEX0
1 0 : ANEX1
1 1 : External op-amp mode