Freescale Semiconductor MPC5553 - Interrupt Operation

MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 21-33
21.4.9 Interrupt Operation
21.4.9.1 Interrupt Sources
There are several interrupt sources that can generate an eSCI interrupt to the CPU. They are listed with
details and descriptions in Table 21-21.
The eSCI only originates interrupt requests. The following sections describe how the eSCI generates a
request and how the MCU acknowledges that request. The eSCI only has a single interrupt line (eSCI
interrupt signal, active high operation) and all the following interrupts, when generated, are ORed together
and issued through that port.
Table 21-21. eSCI Interrupt Flags, Sources, Mask Bits, and Descriptions
Interrupt
Source
Flag Source
Local
Enable
Description
Transmitter TDRE ESCIx_SR[0] TIE Indicates that a byte was transferred from
ESCIx_DR to the transmit shift register.
Transmitter TC ESCIx_SR[1] TCIE Indicates that a transmit is complete.
Receiver RDRF ESCIx_SR[2] RIE Indicates that received data is available in the
eSCI data register.
Receiver IDLE ESCIx_SR[3] ILIE Indicates that receiver input has become idle.
Receiver OR ESCIx_SR[4] ORIE Indicates that an overrun condition has occurred.
Receiver NF ESCIx_SR[5] NFIE Detect noise error on receiver input.
Receiver FE ESCIx_SR[6] FEIE Framing error has occurred.
Receiver PF ESCIx_SR[7] PFIE Parity of received data does not match parity bit;
parity error has occurred.
LIN BERR ESCIx_SR[11] IEBERR Detected a bit error, only valid in LIN mode.
LIN RXRDY ESCIx_SR[16] RXIE Indicates LIN hardware has received a data byte.
LIN TXRDY ESCIx_SR[17] TXIE Indicates LIN hardware can accept a control or
data byte.
LIN LWAKE ESCIx_SR[18] WUIE A wake-up character has been received from a
LIN frame.
LIN STO ESCIx_SR[19] STIE The response of the slave has been too slow
(slave timeout).
LIN PBERR ESCIx_SR[20] PBIE Physical bus error detected.
LIN CERR ESCIx_SR[21] CIE CRC error detected.
LIN CKERR ESCIx_SR[22] CKIE Checksum error detected.
LIN FRC ESCIx_SR[23] FCIE LIN frame completed.
LIN OVFL ESCIx_SR[31] OFIE ESCIx_LRR overflow.