nRF904 Nordic VLSI, nRF904 Datasheet - Page 8

• Manufacturer Part Number: nRF904
• Description: RF Transmitter 902-928MHz
• Manufacturer: Nordic VLSI

PRODUCT SPECIFICATION
The timing information for the different operations is summarised in Table 6.
(TX is Transmit mode, Clk is Clock mode, Pwr_Dn is Power Down Mode.)
Change of Mode
Max Delay
Pwr_Dn Î TX
5ms
Clk Î TX
50 s
Table 6. Switching times for nRF904.
The minimum time from Power Down mode until the synthesised frequency is stable
and data can be transmitted is seen in Figure 6. XTAL is controlled by V
, Figure 4.
R1
VDD
XTAL
DIN
5ms
ms
0
5
Figure 6. Timing diagram when going from Power Down mode to Transmit-mode.
The minimum time from Clock mode until the synthesised frequency is stable and
data can be transmitted is seen in Figure 7. REXT is controlled by V
, Figure 4.
R2
VDD
REXT
DIN
50us
s
0
50
Figure 7. Timing diagram when going from Clock mode to Transmit-mode.
Nordic VLSI ASA
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Vestre Rosten 81, N-7075 Tiller, Norway
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Revision: 2.1
October 2001
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