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AS8530

Datasheet - Application In form atio n

Output RX.

The received BUS signal will be output to the RX pin:

BUS < Vthr_cnt – 0.5 * Vthr_hys

→ RX = low

BUS > Vthr_cnt + 0.5 * Vthr_hys

→ RX = high

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.

MCU

AS8530

VCC

RX

EN

TX

RD

WR

LEN

1

LEN

0

A4

D3 D2

D1 D0

Normal

Mode

Normal Mode

Serial Port Mode

Normal Mode

Standby/Sleep

Mode

Entry into Serial

Port Mode