Texas Instruments MSP430x1xx User Manual page 361

Figure 17−1. ADC12 Block Diagram
Ve REF+
V REF+
V REF− / Ve REF−
INCHx
4
A0 0000 SREF2
A1 0001 0001
A2 0010
A3 0011
Sample
A4 0100
and
A5 0101
Hold
A6 0110
A7 0111
S/H
1000
1001
1010
1011
1100
1101
1110
1111
SAMPCON
AV CC
INCHx=0Bh
Ref_x
R
R
AV SS
AV CC
11 10 01 00
AV SS
1 0 ADC12ON
V R− V R+
12−bit SAR
Convert
BUSY
SHT0x
SHP
4
Sample Timer
1
/4 .. /1024
0
4
SHT1x
ADC12MEM0
CSTARTADDx
CONSEQx
ADC12MEM15
REF2_5V
on
1.5 V or 2.5 V
Reference
Ref_x
SREF1
SREF0 ADC12OSC
ADC12SSELx
ADC12DIVx
00 00
01 01
Divider
/1 .. /8
10 10
11 11
ADC12CLK
ISSH
ENC
SHI
0
Sync
1
MSC
ADC12MCTL0
−
16 x 12
Memory Memory
Buffer Control
−
ADC12MCTL15
ADC12 Introduction
REFON
INCHx=0Ah
AV CC
ACLK
MCLK
SMCLK
SHSx
00 00 ADC12SC
01 01 TA1
10 10 TB0
11 11 TB1
−
16 x 8
−
ADC12 17-3