33903 datasheet(89/104 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33903/4/5

SERIAL PERIPHERAL INTERFACE

FLAGS AND DEVICE STATUS

FIX AND EXTENDED DEVICE STATUS

For every SPI command, the device response on MISO is

fixed status information. This information is either:

Two Bytes

Fix Status + Extended Status: when a device write

command is used (MOSI bits 15-14, bits C1 C0 = 01)

One Byte

Fix Status: when a device read operation is performed

(MOSI bits 15-14, bits C1 C0 = 00 or 11).

Table 39. Status Bits Description

Bits

MISO

INT

RST

CAN-G

LIN-G

I/O-G

SAFE-G VREG-G CAN-BUS CAN-LOC LIN2 LIN1

I/O-1 I/O-0 VREG-1

VREG-0

Bits

Description

INT

Indicates that an INT has occurred and that INT flags are pending to be read.

Indicates that a Wake-Up has occurred and that Wake-Up flags are pending to be read.

RST

Indicates that a reset has occurred and that the flags that report the reset source are pending to be read.

CAN-G

The INT, WU or RST source is CAN interface. CAN local or CAN bus source.

LIN-G

The INT, WU or RST source is LIN2 or LIN1 interface

I/O-G

The INT, WU or RST source is I/O interfaces.

SAFE-G

The INT, WU or RST source is from a SAFE condition

VREG-G

The INT, WU or RST source is from a Regulator event, or voltage monitoring event

CAN-LOC

The INT, WU or RST source is CAN interface. CAN local source.

CAN-BUS

The INT, WU or RST source is CAN interface. CAN bus source.

LIN2

The INT, WU or RST source is LIN2 interface

LIN/LIN1

The INT, WU or RST source is LIN1 interface

I/O-0

The INT, WU or RST source is I/O interface, flag from I/O sub adress Low (bit 7 = 0)

I/O-1

The INT, WU or RST source is I/O interface, flag from I/O sub adress High (bit 7 = 1)

VREG-1

The INT, WU or RST source is from a Regulator event, flag from REG register sub adress high (bit 7 = 1)

VREG-0

The INT, WU or RST source is from a Regulator event, flag from REG register sub adress low (bit 7 = 0)

33903 Datasheet(PDF) 89 Page - Freescale Semiconductor, Inc

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