Datasheet

Revision 1.5 Page 8 of 41
nRF905 Product Specification
3 Block Diagram
Figure 1. nRF905 with external components.
SPI
interface
ShockBurst
Demod
Dataslicer
Address
decode
CRC code/
decode
GFSK
filter
RX - reg.
Config-reg.
TX - reg.
TX - addr.
PA
LNA
IF BBF
Frequency
Synthesiser
Voltage
regulators
Crystal
oscillator
MOSI (11)
MISO (10)
SCK (12)
CSN (13)
TRX_CE (1)
PWR_UP (2)
TX_EN (32)
CD (6)
AM (7)
DR (8)
uPCLK (3)
XC1 (14)
XC2 (15)
ANT1 (20)
ANT2 (21)
VDD_PA (19)
VSS (5)
VSS (16) VSS (18) VSS (22) VSS (24) VSS (27) VSS (28) VSS (29) VSS (30)
VDD (4)
VDD (17) VDD (25)
DVDD_1V2 (31)
IREF (23)
Manchester
encoder/
decoder
VSS (26)
VSS (9)