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MSP430G2533, MSP430G2433, MSP430G2333, MSP430G2233
MSP430G2403, MSP430G2303, MSP430G2203
SLAS734G – APRIL 2011 – REVISED APRIL 2016
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MSP430G2533 MSP430G2433 MSP430G2333 MSP430G2233 MSP430G2403 MSP430G2303
MSP430G2203
Detailed Description
Copyright © 2011–2016, Texas Instruments Incorporated
6.5
Special Function Registers (SFRs)
Most interrupt and module enable bits are collected into the lowest address space. Special function
register bits not allocated to a functional purpose are not physically present in the device. Simple software
access is provided with this arrangement.
Legend
rw
Bit can be read and written.
rw-0, rw-1
Bit can be read and written. It is reset or set by PUC.
rw-(0), rw-(1)
Bit can be read and written. It is reset or set by POR.
SFR bit is not present in device.
Figure 6-2. Interrupt Enable Register 1 (Address = 00h)
7
6
5
4
3
2
1
0
ACCVIE
NMIIE
OFIE
WDTIE
rw-0
rw-0
rw-0
rw-0
Table 6-4. Interrupt Enable Register 1 Description
Bit
Field
Type
Reset
Description
5
ACCVIE
RW
0h
Flash access violation interrupt enable
4
NMIIE
RW
0h
(Non)maskable interrupt enable
1
OFIE
RW
0h
Oscillator fault interrupt enable
0
WDTIE
RW
0h
Watchdog Timer interrupt enable. Inactive if watchdog mode is selected. Active if
Watchdog Timer is configured in interval timer mode.
Figure 6-3. Interrupt Enable Register 2 (Address = 01h)
7
6
5
4
3
2
1
0
UCB0TXIE
UCB0RXIE
UCA0TXIE
UCA0RXIE
rw-0
rw-0
rw-0
rw-0
Table 6-5. Interrupt Enable Register 2 Description
Bit
Field
Type
Reset
Description
3
UCB0TXIE
RW
0h
USCI_B0 transmit interrupt enable
2
UCB0RXIE
RW
0h
USCI_B0 receive interrupt enable
1
UCA0TXIE
RW
0h
USCI_A0 transmit interrupt enable
0
UCA0RXIE
RW
0h
USCI_A0 receive interrupt enable
Figure 6-4. Interrupt Flag Register 1 (Address = 02h)
7
6
5
4
3
2
1
0
NMIIFG
RSTIFG
PORIFG
OFIFG
WDTIFG
rw-0
rw-(0)
rw-(1)
rw-1
rw-(0)
Table 6-6. Interrupt Flag Register 1 Description
Bit
Field
Type
Reset
Description
4
NMIIFG
RW
0h
Set by the RST/NMI pin
3
RSTIFG
RW
0h
External reset interrupt flag. Set on a reset condition at RST/NMI pin in reset
mode. Reset on V
CC
power-up.
2
PORIFG
RW
1h
Power-On Reset interrupt flag. Set on V
CC
power-up.
1
OFIFG
RW
1h
Flag set on oscillator fault.
0
WDTIFG
RW
0h
Set on watchdog timer overflow (in watchdog mode) or security key violation.
Reset on V
CC
power-on or a reset condition at the RST/NMI pin in reset mode.