Rainbow Electronics RF22 - Manual (Page 19)

RF22
Version: 0.1 Date: 12/23/2008
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uC
DATACLK
MOD
nRES
MOSI
MISO
SCK
nSEL
nIRQ
Direct synchronous modulation . Full
control over the standard SPI & using
interrupt. Bitrate clock and modulation
via GPIO's.
GPIO configuration
GP0 : power-on-reset (default)
GP1 : TX DATA clock output
GP2 : TX DATA input
DataCLK
MOD(Data)
VDD_RF
TX
RXp
RXn
SCLK
SDI
SDO
VDD_DIG
AD
C_REF
GP
IO
_0
XI
N
XO
UT
SD
N
nI
R
Q
VR_IF GND_DIG
VR_DI
G
nS
EL
Matching
RF22
GP
IO
_1
GP
IO
_2
Figure11. Direct Synchronous Mode Example
uC
DATACLK
MOD
nRES
MOSI
MISO
SCK
nSEL
nIRQ
Direct asynchronous FSK
modulation. Modulation data
via GPIO2, no data clock
needed in this mode .
GPIO configuration
GP0 : power-on-reset (default)
GP1 : TX DATA clock output
GP2 : TX DATA input
DataCLK
MOD(Data)
VDD_RF
TX
RXp
RXn
SCLK
SDI
SDO
VDD_DIG
ADC_REF GP
IO_0
XI
N
XO
UT
SD
N
nI
R
Q
VR_IF GND_DIG
VR
_
D
IG
nS
EL
Matching
GP
IO_1
GP
IO
_2
RF22
Figure 12. Direct Asynchronous Mode Example