MSP430F5338, MSP430F5336, MSP430F5335, MSP430F5333
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SLAS721D – AUGUST 2010 – REVISED DECEMBER 2015
6.10 RAM
(Link to User's Guide)
The RAM is made up of n sectors. Each sector can be completely powered down to save leakage;
however, all data is lost. Features of the RAM include:
•
RAM has n sectors. The size of a sector can be found in
Memory Organization
.
•
Each sector 0 to n can be complete disabled; however, data retention is lost.
•
Each sector 0 to n automatically enters low power retention mode when possible.
6.11 Backup RAM
The backup RAM provides a limited number of bytes of RAM that are retained during LPMx.5 and during
operation from a backup supply if the Battery Backup System module is implemented.
There are 8 bytes of backup RAM available on MSP430F533x. It can be wordwise accessed by the
control registers BAKMEM0, BAKMEM1, BAKMEM2, and BAKMEM3.
6.12 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
MSP430x5xx and MSP430x6xx Family User's
Guide
(
SLAU208
).
6.12.1 Digital I/O
(Link to User's Guide)
Up to nine 8-bit I/O ports are implemented: P1 through P6, P8, and P9 are complete, P7 contains six
individual I/O ports, and PJ contains four individual I/O ports.
•
All individual I/O bits are independently programmable.
•
Any combination of input, output, and interrupt conditions is possible.
•
Programmable pullup or pulldown on all ports.
•
Programmable drive strength on all ports.
•
Edge-selectable interrupt input capability for all the eight bits of ports P1, P2, P3, and P4.
•
Read and write access to port-control registers is supported by all instructions.
•
Ports can be accessed byte-wise (P1 through P9) or word-wise in pairs (PA through PD).
6.12.2 Port Mapping Controller
(Link to User's Guide)
The port mapping controller allows the flexible and reconfigurable mapping of digital functions to port P2.
Table 6-8
lists the mnemonic for each function that can be assigned.
Table 6-8. Port Mapping Mnemonics and Functions
VALUE
PxMAPy MNEMONIC
INPUT PIN FUNCTION
OUTPUT PIN FUNCTION
0
PM_NONE
None
DV
SS
PM_CBOUT
-
Comparator_B output
1
PM_TB0CLK
Timer TB0 clock input
-
PM_ADC12CLK
-
ADC12CLK
2
PM_DMAE0
DMAE0 Input
-
PM_SVMOUT
-
SVM output
3
Timer TB0 high impedance input
PM_TB0OUTH
-
TB0OUTH
4
PM_TB0CCR0B
Timer TB0 CCR0 capture input CCI0B
Timer TB0: TB0.0 compare output Out0
5
PM_TB0CCR1B
Timer TB0 CCR1 capture input CCI1B
Timer TB0: TB0.1 compare output Out1
6
PM_TB0CCR2B
Timer TB0 CCR2 capture input CCI2B
Timer TB0: TB0.2 compare output Out2
7
PM_TB0CCR3B
Timer TB0 CCR3 capture input CCI3B
Timer TB0: TB0.3 compare output Out3
8
PM_TB0CCR4B
Timer TB0 CCR4 capture input CCI4B
Timer TB0: TB0.4 compare output Out4
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Detailed Description
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