NRF401-IC ETC, NRF401-IC Datasheet - Page 5

• Manufacturer Part Number: NRF401-IC
• Description: 433mhz Single Chip RF Transceiver
• Manufacturer: ETC

PRODUCT SPECIFICATION
nRF401 Single Chip RF Transceiver
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.)
Switching TX
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).
Switching between standby and RX-mode (operational mode).
The time from the PWR_UP input is set to “1”, until the data (DOUT) is valid is t
see Table 5. Worst case t
Switching between standby and TX-mode (operational mode).
The time from the PWR_UP input is set to “1”, until the synthesised frequency is
stable is t
Nordic VLSI ASA -
Revision: 1.5
PWR_UP
TXEN
DIN
VDD
RX to TX
Figure 4. Timing diagram for nRF401for switching from RX to TX (a)
ST
, see Table 5.
Change of Mode
TX è RX
RX è TX
Std.byè TX
Std.byè RX
V
V
DD
DD
0
1ms
=0 è TX
=0 è RX
(a)
RX (operational mode).
Vestre Rosten 81, N-7075 Tiller, Norway -
2
Table 5 Switching times for nRF401.
SR
4
is 3ms for nRF401 as can be seen in Figure 5 (a).
Name
and TX to RX (b).
t
t
t
t
t
t
TR
RT
SR
VT
VR
ST
Page 5 of 18
ms
Max Delay
PWR_UP
3ms
1ms
2ms
3ms
4ms
5ms
DOUT
TXEN
VDD
TX to RX
Phone [phone] - Fax [phone]
Condition
Operational
mode
Start-up
0
(b)
3ms
2
4
May 2000
SR,
,
ms