NRF9E5 NORDIC SEMICONDUCTOR, NRF9E5 Datasheet - Page 43

• Manufacturer Part Number: NRF9E5
• Description: TRX, 430-928MHZ, MCU/ADC/PWM, SMD
• Manufacturer: NORDIC SEMICONDUCTOR

Specifications of NRF9E5

• Receiving Current: 12.5mA
• Transmitting Current: 30mA
• Data Rate: 50Kbps
• Frequency Range: 430MHz To 928MHz
• Modulation Type: GFSK
• Rf Ic Case Style: QFN
• No. Of Pins: 32
• Supply Voltage Range: 1.9V To
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PRODUCT SPECIFICATION
nRF9E5 Single Chip Transceiver with Embedded Microcontroller and ADC
12.3 ShockBurst
After the Data Ready (DR) has been set high a valid data packet is available in the RX
data register. This may be clocked out in Standby mode. After the data has been clocked
out via the SPI interface the Data Ready (DR) and Address Match (AM) signals are reset
to low.
12.4 Preamble
In each data-packet transmitted by the nRF905 a preamble is added automatically. The
preamble is a predefined bit-sequence used to adjust the receiver for optimal
performance. A ten-bit sequence is used as preamble in nRF905. The length of the
preamble, t
12.5 Time On Air
The time-on-air is the sum of the radio start-up time and the data-packet length. The
length of the preamble, address field, payload and CRC-checksum give the data-packet
length while the radio start-up time is given in table XX. While preamble length and
start-up time are fixed the user sets the other parameters in the RF-configuration register.
The below equation shows how to calculate TOA
t
and N
the bitrate, which is equal to 50kbps.
Main office: Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway -Phone [phone] - Fax [phone]
Revision: 1.3
P W R _ U P
T R X _ C E
startup
R X D A T A
T X _ E N
T I M E
A M
C D
D R
and t
CRC
are numbers of bits in the address, payload and CRC-checksum while BR is
preamble
preamble
, is then 200 s.
are RF-start-up time and preamble time respectively. N
TM
6 5 0 u S t o e n t e r R X
m o d e f r o m
T R X _ C E b e in g s e t
h ig h .
Figure 14 Timing diagram for standby to receiving.
RX Timing
TOA
6 5 0 u S
t
startup
T 0
t
preamble
T 0 = R e c e iv e r E n a b le d - L is t e n in g f o r D a t a
T 1 = C a r r ie r D e t e c t f in d s a c a r r ie r
T 2 = A M - C o r r e c t A d d r e s s F o u n d
T 3 = D R - D a t a p a c k e t w it h c o r r e c t A d d r e s s / C R C
Page 43 of 108
N
address
T 1
N
BR
payload
T 2
N
CRC
address
T 3
, N
June 2006
payload