33903 datasheet(83/104 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33903/4/5

SERIAL PERIPHERAL INTERFACE

FLAGS AND DEVICE STATUS

DESCRIPTION

The table below is a summary of the device flags, I/O real

time level, device Identification, and includes examples of

SPI commands (SPI commands do not use parity functions).

They are obtained using the following commands.

This command is composed of the following:

bits 15 and 14:

• [1 1] for failure flags

• - [0 0] for I/O real time status, device identification and

CAN LIN driver receiver real time state.

• bit 13 to 9 are the register address from which the flags is

to be read.

•bit 8 = 1 (this is not parity bit function, as this is a read

command).

When a failure event occurs, the respective flag is set and

remains latched until it is cleared by a read command

(provided the failure event has recovered).

Table 37. Device Flag, I/O Real Time and Device Identification

Bits

15-14

13-9

MOSI

MOSI bits 15-7

Next 7 MOSI bits (bits 6.0) should be “000_0000”

bits [15,

14]

Address

[13-9]

bit 8

bit

MISO

8 Bits Device Fixed Status

(bits 15...8)

MISO bits [7-0], device response on MISO pin

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

REG

0_1111

REG

VAUX_LOW

VAUX_OVER-

CURRENT

5V-CAN_

THERMAL

SHUTDOWN

5V-CAN_

OVER-

CURRENT

VSENSE_

LOW

VSUP_

UNDER-

VOLTAGE

IDD-OC-

NORMAL

MODE

VDD_

THERMAL

SHUTDOWN

RST_LOW

(<100 ms)

VSUP_

BATFAIL

IDD-OC-LP

VDDON

MODE

Hexa SPI commands to get Vreg Flags: MOSI 0x DF 00, and MOSI Ox DF 80

CAN

1_0000

CAN

Wake-Up

CAN Over-

temp

RXD low

Rxd high

TXD dom

Bus Dom

clamp

CAN Over-

current

CAN_UF

CAN_F

CANL

to VBAT

CANL to VDD

CANL to

GND

CANH to

VBAT

CANH to VDD

CANH to

GND

Hexa SPI commands to get CAN Flags: MOSI 0x E1 00, and MOSI 0x E1 80

1_0000

CAN

CAN Driver

State

CAN Receiver

State

CAN WU

en/dis

Hexa SPI commands to get CAN real time status: MOSI 0x 21 80

I/O

1_0001

I/O

HS3 short to

GND

HS2 short to

GND

SPI parity

error

CSB low

>2ms

VSUP/2-UV VSUP/1-OV I/O_O thermal watchdog

flash mode

50%

I/O_1-3

Wake-Up

I/O_0-2

Wake-Up

SPI Wake-

FWU

INT service

Timeout

LP VDD OFF Reset request Hardware

Leave Debug

Hexa SPI commands to get I/O Flags and I/O Wake-Up: MOSI 0x E3 00, and MOSI 0x E3 80

1_0001

I/O

I/O_3

state

I/O_2

state

I/O_1 state

I/O_0 state

Hexa SPI commands to get I/O real time level: MOSI 0x 23 80

INT

1_0010

Interrupt

INT request

RST high

DBG resistor

VDD temp

Pre-warning

VDD UV

VDD Over-

voltage

VAUX_OVER-

VOLTAGE

VDD low

>100 ms

VDD low RST

RST low

>100 ms

multiple

Resets

watchdog

refresh

failure

Hexa SPI commands to get INT Flags: MOSI 0x E5 00, and MOSI 0x E5 80

1_0010

Interrupt

VDD (5.0 V or

3.3 V)

device

p/n 1

device

p/n 0

id4

id3

id2

id1

id0

Hexa SPI commands to get device Identification: MOSI 0x 25 10

example: MISO bit [7-0] = 1011 0010: MC33904, 5.0 V version, silicon pass 3.1

33903 Datasheet(PDF) 83 Page - Freescale Semiconductor, Inc

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