Texas Instruments C2000 Workshop Guide And Lab Manual

Comparator
6 - 18 C2000 Microcontroller Workshop - Analog-to-Digital Converter
Comparator Block Diagram
DACVAL * (V
DDA
– V
SSA
)
1023
V =
DAC Reference Comparator Truth Table
Voltages Output
Voltage A < Voltage B 0
Voltage A > Voltage B 1
0
1
0
1
+
COMPx
-
ePWM
Event
Trigger
&
GPIO
MUX
Sync/
Qual
10-bit
DAC
COMPSTS
V
DDA
V
SSA
Input Pin B
Input Pin A
1
0
COMPSOURCE
DACVAL
CMPINV
COMPDACE
SYNCSEL
QUALSEL
SYSCLKOUT
COMPxTRIP
V
1 0
DACSOURCE
Ramp
Generator
PWMSYNC1
PWMSYNC2
PWMSYNC3
PWMSYNC4
00
01
10
11
RAMPSOURCE
Comparator Registers
Comparator Registers
reserved
15 - 10
DACVAL
9 - 0
Scales output of DAC from 0 – 1023
Value = 0 – 3FFh
AdcRegs.DACVAL – DAC Value Register
reserved
15 - 1
COMPSTS
0
AdcRegs.COMPSTS – Compare Output Status Register
Logical latched value of the comparator
reserved
15 - 9
7 - 3
SYNCSEL QUALSEL CMPINV COMPSOURCE COMPDACE
8 2 1 0
AdcRegs.COMPCTL – Compare Control Register
Synchronization Select
Output before being feed
to ETPWM/GPIO blocks
0 = Asynchronous
1 = Synchronous
Comparator/
DAC Enable
0 = disable
1 = enable
Comparator
Source
0 = DAC
1 = pin
Invert
0 = no invert
1 = inverted
Qualification
Period
0h = no qual
1h = 2 clocks
… …
Fh = 16 clocks
reserved
13 - 5
DACSOURCE
4 - 1
DAC source (DACVAL or RAMP Generator) and RAMP source sync select
AdcRegs.DACCTL – DAC Control Register
RAMPSOURCE
FREE:SOFT
15 - 14
0

Texas Instruments C2000 Specifications

General

Brand	Texas Instruments
Model	C2000
Category	Microcontrollers
Language	English