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CC1110-RTR1 데이터시트(PDF) 157 Page - Texas Instruments

부품명 CC1110-RTR1
상세설명  True System-on-Chip with Low Power RF Transceiver and 8051 MCU
PDF  203 Pages
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
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CC1110-RTR1 데이터시트(HTML) 157 Page - Texas Instruments

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CC1110
CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A
Page 157 of 202
The interrupt enable bits in RFIM are used
to disable individual interrupt sources for
the RF interrupt vector. Note that masking
an interrupt source in RFIM does not affect
the update of the status in the RFIF
register.
Due to the use of the individual interrupt
masks in RFIM, and the main interrupt
mask for the RF interrupt given by
IEN2.RFIE there is two-layered masking
of this interrupt. Special attention needs to
be taken when processing this type of
interrupt as described below.
To clear the RF interrupt, S1CON.RFIF
and the interrupt flag in RFIF need to be
cleared. The order and method of doing
this is shown in Figure 34. Note that
S1CON is cleared after RFIF, otherwise
S1CON.RFIF could be set once again due
to the same interrupt.
MOV
RFIF,#00h
;clear all interrupt flags
MOV
S1CON,#00h
;clear main interrupt flags
MOV
RFIM,RFIM
;set interrupt mask
Figure 34: Clearing RF Interrupt
RFIF (0xE9) – RF Interrupt Flags
Bit
Name
Reset
R/W
Description
7:6
-
00
R0
Not used
RX timeout, no packet has been received in the programmed period.
0
No interrupt pending
5
IRQ_TIMEOUT
0
R/W0
1
Interrupt pending
Packet received/transmitted. Also used to detect underflow/overflow
conditions.
0
No interrupt pending
4
IRQ_DONE
0
R/W0
1
Interrupt pending
Carrier sense.
0
No interrupt pending
3
IRQ_CS
0
R/W0
1
Interrupt pending
Preamble quality reached.
0
No interrupt pending
2
IRQ_PQT
0
R/W0
1
Interrupt pending
Clear Channel Assessment
0
No interrupt pending
1
IRQ_CCA
0
R/W0
1
Interrupt pending
Start of Frame Delimiter, sync word detected
0
No interrupt pending
0
IRQ_SFD
0
R/W0
1
Interrupt pending



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