Datasheet

MSP430F261x
MSP430F241x
www.ti.com SLAS541K –JUNE 2007–REVISED NOVEMBER 2012
Special Function Registers
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-0,1: Bit can be read and written. It is reset or set by PUC.
rw-(0,1): Bit can be read and written. It is reset or set by POR.
SFR bit is not present in device.
Table 6. Interrupt Enable Register 1 and 2
Address 7 6 5 4 3 2 1 0
00h ACCVIE NMIIE OFIE WDTIE
rw-0 rw-0 rw-0 rw-0
WDTIE Watchdog Timer interrupt enable. Inactive if watchdog mode is selected. Active if Watchdog Timer is configured in
interval timer mode.
OFIE Oscillator fault interrupt enable
NMIIE (Non)maskable interrupt enable
ACCVIE Flash access violation interrupt enable
Address 7 6 5 4 3 2 1 0
01h UCB0TXIE UCB0RXIE UCA0TXIE UCA0RXIE
rw-0 rw-0 rw-0 rw-0
UCA0RXIE USCI_A0 receive interrupt enable
UCA0TXIE USCI_A0 transmit interrupt enable
UCB0RXIE USCI_B0 receive interrupt enable
UCB0TXIE USCI_B0 transmit interrupt enable
Table 7. Interrupt Flag Register 1 and 2
Address 7 6 5 4 3 2 1 0
02h NMIIFG RSTIFG PORIFG OFIFG WDTIFG
rw-0 rw-(0) rw-(1) rw-1 rw-(0)
WDTIFG 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.
OFIFG Flag set on oscillator fault.
PORIFG Power-On Reset interrupt flag. Set on V
CC
power-up.
RSTIFG External reset interrupt flag. Set on a reset condition at RST/NMI pin in reset mode. Reset on V
CC
power-up.
NMIIFG Set via RST/NMI pin
Address 7 6 5 4 3 2 1 0
03h UCB0TXIFG UCB0RXIFG UCA0TXIFG UCA0RXIFG
rw-1 rw-0 rw-1 rw-0
UCA0RXIFG USCI_A0 receive interrupt flag
UCA0TXIFG USCI_A0 transmit interrupt flag
UCB0RXIFG USCI_B0 receive interrupt flag
UCB0TXIFG USCI_B0 transmit interrupt flag
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