www.austriamicrosystems.com/Lin_CompanionIC/AS8530

Revision 0.01

20 - 29

AS8530

Preliminary Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

Figure 10. RX Output Circuitry

8.6 MODE Input EN

Device is switched from standby mode to normal mode with a rising edge at the EN pin. The mode change for AS8530 with a falling edge at EN

can be done independently from the state of the bus transceiver. Device enters into Serial port mode by forcing EN low and driving TX high to low

This ensures the direct control of device to enter into Standby/Sleep mode by microcontroller using EN pin.

Figure 11. EN Pin Functionality

The EN input has an internal active pull down to secure that if this pin is not connected, a low level will be generated.

Figure 12. Enable Controlled via. MCU

MCU

AS8530

VCC

RX

EN

TX

RD

WR

LEN1 LEN0

A4

D3

D2

D1

D0

Normal Mode

Normal

Mode

Serial Port

Mode

Normal

Mode

Standby/Sleep

Mode

Entry into

Serial Port

Mode

EN

VSUP

VSS

VCC

RESET

RX

TX

AS8530

MCU

+ 5V

LIN

+