MC33388

MOTOROLA

9

MC33388

DEVICE DESCRIPTION

Figure 3. State Machine And Operation Modes

Table1• Truth Table

NOTES:

1. Wake-up interrupts are released when entering normal operating mode.

2. If go to sleep command was used before (EN may turn LOW as VDD drops, without affecting internal functions because of fail safe functionality.

3. VBAT power-on flag will be reset when entering normal operation mode.

4. Value are typical, without bus load current.

5. In recessive state.

6. In Dominant State, value with no load at bus.

STB

EN

Mode

INH

NERR

RX

RTL

0

0

VBAT

High

Active LOW:

wake-up interrupt signal

Switched to

5

µA

typ. 15

µA

0

0

Floating

Switched to

Not

applicable

typ. 15

µA

0

1

Go to sleep

command

Floating

Switched to

1

0

High

Active LOW:

High: recessive state

Low: dominant state

Switched to

800

µA

1

1

Normal

High

Active LOW:

error flag

Switched to

2.3mA (5)

3.3mA (6)

typ.

150

µA

Normal mode (1, 1)

(BUS failure, ON)

Receive Only mode (1, 0)

(VBAT fail flag, ON)

(Wake up event, ON)

Sleep mode (0, 0)

Go to sleep mode (0, 1)

(1, 0)

(0, 1)

(1, 1)

(0, 1)

(0, 0)

(1, 0)

DD

µs

(1, 1)

(1, 0)

(0, 1)

(0, 0)

wake-up event

(bus message, wake pin)

power up

(0, 0)

Transceiver mode (STB state, EN state)

(NERR function, INH state)

NERR: BUS - Bus error is flagged

WAKE - Wake-up event is flagged

BAT - BAT fail is flagged

INH: ON - INH is switched on

OFF - INH is floating

Legend:

(1, 1)

Freescale Semiconductor, Inc.

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