K60P100M100SF2RM Datasheet, PDF (1555/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 51 Universal Asynchronous Receiver/Transmitter (UART)
51.4.8.2 Infrared receive decoder
The infrared receive block converts data from the RXD signal to the receive shift register.
A narrow pulse is expected for each zero received and no pulse is expected for each one
received. A narrow high pulse is expected for a zero bit when S2[RXINV] is cleared,
while a narrow low pulse is expected for a zero bit when S2[RXINV] is set. This receive
decoder meets the edge jitter requirement as defined by the IrDA serial infrared physical
layer specification.
51.5 Reset
All registers reset to a particular value are indicated in Memory map and registers.
51.6 System level interrupt sources
There are several interrupt signals that are sent from the UART. The following table lists
the interrupt sources generated by the UART. The local enables for the UART interrupt
sources are described in this table. Details regarding the individual operation of each
interrupt are contained under various sub-sections of Memory map and registers.
However, RXEDGIF description also outlines additional details regarding the RXEDGIF
interrupt because of its complexity of operation. Any of the UART interrupt requests
listed in the table can be used to bring the CPU out of wait mode.
Table 51-206. UART interrupt sources
Interrupt Source
Transmitter
Transmitter
Receiver
Receiver
Receiver
Receiver
Receiver
Receiver
Receiver
Receiver
Receiver
Transmitter
Flag
TDRE
TC
IDLE
RDRF
LBKDIF
RXEDGIF
OR
NF
FE
PF
RXUF
TXOF
Local enable
TIE
TCIE
ILIE
RIE
LBKDIE
RXEDGIE
ORIE
NEIE
FEIE
PEIE
RXUFE
TXOFE
DMA select
TDMAS = 0
-
-
RDMAS = 0
-
-
-
-
-
-
-
-
Table continues on the next page...
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1555