PRODUCT SPECIFICATION

nRF403 Single Chip RF Transceiver

Nordic VLSI ASA -

Vestre Rosten 81, N-7075 Tiller, Norway

-

Phone +4772898900

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Fax +4772898989

Revision: 1.1

Page 5 of 18

July 2001

IMPORTANT TIMING DATA

Timing information

The timing information for the different operations is summarised in Table 5.

(TX is transmit mode, RX is receive mode and Std.by is Standby mode.)

Change of Mode

Name

Max Delay

Condition

TX

è RX

3ms

RX

è TX

1ms

Std.by

è TX

2ms

Std.by

è RX

3ms

Operational

mode

4ms

5ms

Start-up

Table 5 Switching times for nRF403.

Switching TX

↔

↔ RX (operational mode).

When switching from RX-mode to TX-mode data (DIN) may not be sent before the

TXEN-input has been high for at least 1ms, see Figure 4(a).

When switching from TX-mode to RX-mode the receiver may not receive data

(DOUT) before the TXEN-input has been low for at least 3ms, see Figure 4(b).

PWR_UP

VDD

TXEN

DIN

0

2

4

ms

1ms

RX to TX

PWR_UP

VDD

TXEN

DOUT

0

2

4

ms

3ms

TX to RX

(a)

(b)

Figure 4. Timing diagram for nRF403for switching from RX to TX (a)

and TX to RX (b).

Switching between standby and RX-mode (operational mode).

Switching between standby and TX-mode (operational mode).

The time from the PWR_UP input is set to “1”, until the synthesised frequency is