Texas Instruments IC MCU 16B MSP430F2111IRGET VQFN-24 TID MSP430F2111IRGET Datenbogen
Produktcode
MSP430F2111IRGET
MSP430F21x1
SLAS439F
–
SEPTEMBER 2004
–
REVISED AUGUST 2011
Peripherals
Peripherals are connected to the CPU through data, address, and control buses and can be handled using all
instructions. For complete module descriptions, see the MSP430x2xx Family User's Guide (
instructions. For complete module descriptions, see the MSP430x2xx Family User's Guide (
).
Oscillator and System Clock
The clock system is supported by the basic clock module that includes support for a 32768-Hz watch crystal
oscillator, an internal digitally-controlled oscillator (DCO), and a high-frequency crystal oscillator. The basic clock
module is designed to meet the requirements of both low system cost and low power consumption. The internal
DCO provides a fast turn-on clock source and stabilizes in less than 1
oscillator, an internal digitally-controlled oscillator (DCO), and a high-frequency crystal oscillator. The basic clock
module is designed to meet the requirements of both low system cost and low power consumption. The internal
DCO provides a fast turn-on clock source and stabilizes in less than 1
µ
s. The basic clock module provides the
following clock signals:
•
Auxiliary clock (ACLK), sourced from a 32768-Hz watch crystal or a high-frequency crystal
•
Main clock (MCLK), the system clock used by the CPU
•
Sub-Main clock (SMCLK), the sub-system clock used by the peripheral modules
Table 13. DCO Calibration Data, Provided From Factory In Flash Info Memory
Segment A
DCO FREQUENCY
CALIBRATION REGISTER
SIZE
ADDRESS
CALBC1_1MHZ
byte
0x010FF
1 MHz
CALBC0_1MHZ
byte
0x010FE
CALBC1_8MHZ
byte
0x010FD
8 MHz
CALBC0_8MHZ
byte
0x010FC
CALBC1_12MHZ
byte
0x010FB
12 MHz
CALBC0_12MHZ
byte
0x010FA
CALBC1_16MHZ
byte
0x010F9
16 MHz
CALBC0_16MHZ
byte
0x010F8
Brownout
The brownout circuit is implemented to provide the proper internal reset signal to the device during power on and
power off.
power off.
Digital I/O
There are two 8-bit I/O ports implemented
—
ports P1 and P2.
•
All individual I/O bits are independently programmable.
•
Any combination of input, output, and interrupt condition is possible.
•
Edge-selectable interrupt input capability for all eight bits of port P1 and P2.
•
Read/write access to port-control registers is supported by all instructions.
•
Each I/O has an individually programmable pullup/pulldown resistor.
Watchdog Timer (WDT+)
The primary function of the WDT+ module is to perform a controlled system restart after a software problem
occurs. If the selected time interval expires, a system reset is generated. If the watchdog function is not needed
in an application, the module can be disabled or configured as an interval timer and can generate interrupts at
selected time intervals.
occurs. If the selected time interval expires, a system reset is generated. If the watchdog function is not needed
in an application, the module can be disabled or configured as an interval timer and can generate interrupts at
selected time intervals.
Comparator_A+
The primary function of the comparator_A+ module is to support precision slope analog-to-digital conversions,
battery-voltage supervision, and monitoring of external analog signals.
battery-voltage supervision, and monitoring of external analog signals.
Copyright
©
2004
–
2011, Texas Instruments Incorporated
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