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NRF24L01P-R データシート(PDF) 42 Page - Nordic Semiconductor

部品番号 NRF24L01P-R
部品情報  Single Chip 2.4GHz Transceiver
PDF  78 Pages
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メーカー  NORDIC [Nordic Semiconductor]
ホームページ  https://www.nordicsemi.com/
Logo NORDIC - Nordic Semiconductor

NRF24L01P-R データシート(HTML) 42 Page - Nordic Semiconductor

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Revision 1.0
Page 42 of 78
nRF24L01+ Product Specification
7.7
Enhanced ShockBurst™ timing
This section describes the timing sequence of Enhanced ShockBurst™ and how all modes are initiated
and operated. The Enhanced ShockBurst™ timing is controlled through the Data and Control interface.
The nRF24L01+ can be set to static modes or autonomous modes where the internal state machine con-
trols the events. Each autonomous mode/sequence ends with an interrupt at the IRQ pin. All the interrupts
are indicated as IRQ events in the timing diagrams.
Figure 15. Transmitting one packet with NO_ACK on
The following equations calculate various timing measurements:
Table 19. Timing equations
Symbol
Description
Equation
TOA
Time on-air
TACK
Time on-air Ack
TUL
Time Upload
TESB
Time Enhanced Shock-
Burst™ cycle
TESB = TUL + 2 . Tstby2a + TOA + TACK + TIRQ
1 IRQ if No Ack is on.
TIRQ = 8.2µs @ 1Mbps, TIRQ = 6.0µs @ 2Mbps, Tstdby2a = 130us
Standby-I
PLL Lock
TX
PTX IRQ
PTX MODE
UL
PTX CE
PTX SPI
TOA
Tstdby2a
TUL
IRQ:
TX DS
1
Standby-I
TIRQ
>10us
[ ]
[] [
]
[]
[ ]
[]
s
bit
rate
data
air
bit
bytes
or
bytes
N
bytes
or
byte
byte
bit
rate
data
air
length
packet
T
field
control
packet
CRC
payload
address
preamble
OA
9
2
1
5
4
,
3
1
8
+
⎟
⎠
⎞
⎜
⎝
⎛
+
+
+
⋅
⎥⎦
⎤
⎢⎣
⎡
=
=
[]
[
]
[
]
[
]
[ ]
[]
s
bit
rate
data
air
bit
bytes
or
bytes
N
bytes
or
byte
byte
bit
rate
data
air
length
packet
T
field
control
packet
CRC
payload
address
preamble
ACK
9
2
1
5
4
,
3
1
8
+
⎟
⎠
⎞
⎜
⎝
⎛
+
+
+
⋅
⎥⎦
⎤
⎢⎣
⎡
=
=
[]
[]
s
bit
rate
data
SPI
bytes
N
byte
bit
rate
data
SPI
length
payload
T
payload
UL
⋅
⎥⎦
⎤
⎢⎣
⎡
=
=
8



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