MSP430FR2033 Datasheet, PDF (42/89 Pages) Texas Instruments – Mixed-Signal Microcontrollers

MSP430FR2033, MSP430FR2032
SLASE45B – OCTOBER 2014 – REVISED AUGUST 2015
www.ti.com
6.9.9 Real-Time Clock (RTC) Counter
The RTC counter is a 16-bit modulo counter that is functional in AM, LPM0, LPM3, and LPM3.5. The RTC
can periodically wake up the CPU from LPM0, LPM3, or LPM3.5 based on timing from a low-power clock
source such as the XT1 and VLO clocks. In AM, RTC can be driven by SMCLK to generate high-
frequency timing events and interrupts. The RTC overflow events trigger:
• Timer0_A3 CCR1B
• ADC conversion trigger when ADCSHSx bits are set as 01b
6.9.10 10-Bit Analog Digital Converter (ADC)
The 10-bit ADC module supports fast 10-bit analog-to-digital conversions with single-ended input. The
module implements a 10-bit SAR core, sample select control, reference generator and a conversion result
buffer. A window comparator with a lower and upper limit allows CPU independent result monitoring with
three window comparator interrupt flags.
The ADC supports 10 external inputs and four internal inputs (see Table 6-12).
Table 6-12. ADC Channel Connections
ADCSHSx
ADC CHANNELS
EXTERNAL PIN OUT
0
A0/Veref–
P1.0
1
A1/Veref+
P1.1
2
A2
P1.2
3
A3
4
A4 ⁽¹⁾
P1.3
P1.4
5
A5
P1.5
6
A6
P1.6
7
A7
8
A8
9
A9
P1.7
P8.0 ⁽²⁾
P8.1 ⁽²⁾
10
Not used
N/A
11
Not used
N/A
12
On-chip temperature sensor
N/A
13
Reference voltage (1.5 V)
N/A
14
DVSS
N/A
15
DVCC
N/A
(1) When A4 is used, the PMM 1.2-V reference voltage can be output to this pin by setting the PMM
control register. The 1.2-V voltage can be directly measured by A4 channel.
(2) P8.0 and P8.1 are only available in the LQFP-64 package.
The A/D conversion can be started by software or a hardware trigger. Table 6-13 shows the trigger
sources that are available.
Table 6-13. ADC Trigger Signal Connections
ADCSHSx
BINARY
DECIMAL
00
0
01
1
10
2
11
3
TRIGGER SOURCE
ADCSC bit (software trigger)
RTC event
TA1.1B
TA1.2B
42
Detailed Description
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