MAC7200 datasheet(746/976 Pages) FREESCALE

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Functional Description

MAC7200 Microcontroller Family Reference Manual, Rev. 2

668

Freescale Semiconductor

The following describes how the eSCI generates a request and how the MCU should acknowledge that

request. The interrupt vector offset and interrupt number are chip dependent. 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.

31.10.9.2 Interrupt Description

Table 31-28 describes the interrupt sources of the eSCI. The enables for these sources, are listed in Table

4-7.

Table 31-28. eSCI Interrupt Sources

Interrupt

Source

Description

TDRE

SCISR1[7]

Active high level detect. Indicates that a byte was

transferred from SCIDRH/L to the transmit shift

SCISR1[6]

Active high level detect. Indicates that a transmit

is complete.

RDRF

SCISR1[5]

Active high level detects. The RDRF interrupt

indicates that received data is available in the SCI

data register.

IDLE

SCISR1[4]

Active high level detect. Indicates that receiver

input has become idle.

SCISR1[3]

Active high level detects. This interrupt indicates

that an overrun condition has occurred.

SCISR1[2]

Active high level detects. This interrupt indicates

that noise has been detected.

SCISR1[1]

Active high level detects. This interrupt indicates

that a frame error has occurred.

SCISR1[0]

Active high level detects. This interrupt indicates

that a parity error has occurred.

BERR

SCISR2[4]

Detected a Bit Error, only valid in LIN mode

RXRDY

LINSTAT1[7]

Indicates LIN hardware has received a data byte

TXRDY

LINSTAT1[6]

Indicates LIN hardware can accept a control or

data byte

LWAKE

LINSTAT1[5]

A Wakeup Character has been received from a

LIN frame

STO

LINSTAT1[4]

The response of the slave has been too slow

(Slave TimeOut)

PBERR

LINSTAT1[3]

Physical Bus Error detected

CERR

LINSTAT1[2]

CRC Error detected

CKERR

LINSTAT1[1]

Checksum Error detected

FRC

LINSTAT1[0]

LIN Frame completed

OVFL

LINSTAT2[0]

LINRX Register Overflow

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