RFM70-S QUASAR, RFM70-S Datasheet - Page 13

• Manufacturer Part Number: RFM70-S
• Description: MODULE, TRANSCEIVER, SMD, 2.4GHZ
• Manufacturer: QUASAR

Specifications of RFM70-S

• Modulation Type: GFSK
• Data Rate Max: 2Mbps
• Frequency Range: 2.4GHz To 2.527GHz
• Sensitivity: -85dBm
• Supply Voltage Range: 1.9V To 3.6V
• Supply Current: 23mA
• Interface Type: SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ACTIVATE
R_RX_PL_WID
W_ACK_PAYLOAD
W_TX_PAYLOAD_NO
ACK
NOP
6.3.2
MOSI
MISO
MOSI
MISO
SCK
CSN
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SPI Timing
HI-Z
x
x
Read from SPI register:
x
Write to SPI register:
C7
S7
C7
S7
0101 0000
0110 0000
1010 1PPP
1011 0000
1111 1111
C6
S6
S6
C6
C5
S5
S5
C5
C4
S4
S4
C4
C3
S3
C3
S3
Table 2 SPI command
1 to 32
0
1
LSB byte first
1 to 32
LSB byte first
C2
Figure 6 SPI timing
S2
C2
S2
C1
S1
C1
S1
C0
S0
C0
S0
x
This write command followed by data 0x73 activates
the following features:
• R_RX_PL_WID
• W_ACK_PAYLOAD
• W_TX_PAYLOAD_NOACK
A new ACTIVATE command with the same data
deactivates them again. This is executable in power
down or stand by modes only.
The R_RX_PL_WID, W_ACK_PAYLOAD, and
W_TX_PAYLOAD_NOACK features registers are
initially in a deactivated state; a write has no effect, a
read only results in zeros on MISO. To activate these
registers, use the ACTIVATE command followed by
data 0x73. Then they can be accessed as any other
register. Use the same command and data to
deactivate the registers again.
This write command followed by data 0x53 toggles
the register bank, and the current register bank
number can be read out from REG7 [7]
Read RX-payload width for the top
R_RX_PAYLOAD in the RX FIFO.
Used in RX mode.
Write Payload to be transmitted together with
ACK packet on PIPE PPP. (PPP valid in the range
from 000 to 101). Maximum three ACK packet
payloads can be pending. Payloads with same PPP are
handled using first in - first out principle. Write
payload: 1– 32 bytes. A write operation always starts
at byte 0.
Used in TX mode. Disables AUTOACK on this
specific packet.
No Operation. Might be used to read the STATUS
register
D7
0
D7
D6
D6
0
D5
D5
0
D4
D4
0
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D3
D3
0
x
D2
D2
0
RFM70
D1
D1
0
D0
D0
0
x
x
Hi-Z
V1.0
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