AN466
Si4030/31/32 R EGISTER D ESCRIPTIONS
1. Complete Register Summary
Table 1. Register Descriptions
Add
R/W
Function/Desc
Data
D7
D6
D5
0
01
R
Device Version
0
0
02
R
Device Status
ffovfl
ffunfl
D4
D3
D2
D1
D0
POR
Default
vc[4]
vc[3]
vc[2]
vc[1]
vc[0]
06h
Reserved
reserved
reserved
cps[1]
cps[0]
—
—
03
R
Interrupt Status 1
ifferr
itxffafull
itxffaem
Reserved
iext
ipksent
Reserved
Reserved
04
R
Interrupt Status 2
Reserved
Reserved
Reserved
Reserved
iwut
ilbd
ichiprdy
ipor
—
05
R/W
Interrupt Enable 1
enfferr
entxffafull
entxffaem
Reserved
enext
enpksent
Reserved
Reserved
00h
06
R/W
Interrupt Enable 2
Reserved
Reserved
Reserved
Reserved
enwut
enlbd
enchiprdy
enpor
03h
07
R/W
Operating & Function Control 1
swres
enlbd
enwt
x32ksel
txon
Reserved
pllon
xton
01h
08
R/W
Operating & Function Control 2
Reserved
Reserved
Reserved
Reserved
autotx
enldm
Reserved
ffclrtx
00h
09
R/W
Crystal Oscillator Load
Capacitance
xtalshft
xlc[6]
xlc[5]
xlc[4]
xlc[3]
xlc[2]
xlc[1]
xlc[0]
7Fh
0A
R/W
Microcontroller Output Clock
Reserved
Reserved
clkt[1]
clkt[0]
enlfc
mclk[2]
mclk[1]
mclk[0]
06h
0B
R/W
GPIO0 Configuration
gpio0drv[1]
gpio0drv[0]
pup0
gpio0[4]
gpio0[3]
gpio0[2]
gpio0[1]
gpio0[0]
00h
0C
R/W
GPIO1 Configuration
gpio1drv[1]
gpio1drv[0]
pup1
gpio1[4]
gpio1[3]
gpio1[2]
gpio1[1]
gpio1[0]
00h
0D
R/W
GPIO2 Configuration
gpio2drv[1]
gpio2drv[0]
pup2
gpio2[4]
gpio2[3]
gpio2[2]
gpio2[1]
gpio2[0]
00h
0E
R/W
I/O Port Configuration
Reserved
extitst[2]
extitst[1]
extitst[0]
itsdo
dio2
dio1
dio0
00h
0F
R/W
ADC Configuration
adcstart/adcdone
adcsel[2]
adcsel[1]
adcsel[0]
adcref[1]
adcref[0]
adcgain[1]
adcgain[0]
00h
10
R/W
ADC Sensor Amplifier Offset
Reserved
Reserved
Reserved
Reserved
adcoffs[3]
adcoffs[2]
adcoffs[1]
adcoffs[0]
00h
11
R
ADC Value
adc[7]
adc[6]
adc[5]
adc[4]
adc[3]
adc[2]
adc[1]
adc[0]
—
12
R/W
Temperature Sensor Control
tsrange[1]
tsrange[0]
entsoffs
entstrim
tstrim[3]
tstrim[2]
tstrim[1]
tstrim[0]
20h
13
R/W
Temperature Value Offset
tvoffs[7]
tvoffs[6]
tvoffs[5]
tvoffs[4]
tvoffs[3]
tvoffs[2]
tvoffs[1]
tvoffs[0]
00h
14
R/W
Wake-Up Timer Period 1
Reserved
Reserved
Reserved
wtr[4]
wtr[3]
wtr[2]
wtr[1]
wtr[0]
03h
15
R/W
Wake-Up Timer Period 2
wtm[15]
wtm[14]
wtm[13]
wtm[12]
wtm[11]
wtm[10]
wtm[9]
wtm[8]
00h
16
R/W
Wake-Up Timer Period 3
wtm[7]
wtm[6]
wtm[5]
wtm[4]
wtm[3]
wtm[2]
wtm[1]
wtm[0]
01h
17
R
Wake-Up Timer Value 1
wtv[15]
wtv[14]
wtv[13]
wtv[12]
wtv[11]
wtv[10]
wtv[9]
wtv[8]
—
18
R
Wake-Up Timer Value 2
wtv[7]
wtv[6]
wtv[5]
wtv[4]
wtv[3]
wtv[2]
wtv[1]
wtv[0]
—
Reserved
lbdt[4]
lbdt[3]
lbdt[2]
lbdt[1]
lbdt[0]
14h
0
vbat[4]
vbat[3]
vbat[2]
vbat[1]
vbat[0]
—
19
1A
1B
Reserved
R/W Low Battery Detector Threshold
R
Battery Voltage Level
Reserved
Reserved
0
0
1C-2F
Reserved
30
R/W
Data Access Control
Reserved
lsbfrst
crcdonly
Reserved
enpactx
encrc
crc[1]
crc[0]
8Dh
31
R
EzMAC status
0
Reserved
Reserved
Reserved
Reserved
Reserved
pktx
pksent
—
33
R/W
Header Control 2
Reserved
hdlen[2]
hdlen[1]
hdlen[0]
fixpklen
synclen[1]
synclen[0]
prealen[8]
22h
34
R/W
Preamble Length
prealen[7]
prealen[6]
prealen[5]
prealen[4]
prealen[3]
prealen[2]
prealen[1]
prealen[0]
08h
36
R/W
Sync Word 3
sync[31]
sync[30]
sync[29]
sync[28]
sync[27]
sync[26]
sync[25]
sync[24]
2Dh
37
R/W
Sync Word 2
sync[23]
sync[22]
sync[21]
sync[20]
sync[19]
sync[18]
sync[17]
sync[16]
D4h
38
R/W
Sync Word 1
sync[15]
sync[14]
sync[13]
sync[12]
sync[11]
sync[10]
sync[9]
sync[8]
00h
39
R/W
Sync Word 0
sync[7]
sync[6]
sync[5]
sync[4]
sync[3]
sync[2]
sync[1]
sync[0]
00h
32
Reserved
Rev 0.1 12/09
Copyright © 2009 by Silicon Laboratories
Si4030/31/32
AN466
Table 1. Register Descriptions (Continued)
Add
R/W
3A
R/W
Function/Desc
Transmit Header 3
Data
POR
Default
D7
D6
D5
D4
D3
D2
D1
D0
txhd[31]
txhd[30]
txhd[29]
txhd[28]
txhd[27]
txhd[26]
txhd[25]
txhd[24]
00h
00h
3B
R/W
Transmit Header 2
txhd[23]
txhd[22]
txhd[21]
txhd[20]
txhd[19]
txhd[18]
txhd[17]
txhd[16]
3C
R/W
Transmit Header 1
txhd[15]
txhd[14]
txhd[13]
txhd[12]
txhd[11]
txhd[10]
txhd[9]
txhd[8]
00h
3D
R/W
Transmit Header 0
txhd[7]
txhd[6]
txhd[5]
txhd[4]
txhd[3]
txhd[2]
txhd[1]
txhd[0]
00h
3E
R/W
Transmit Packet Length
pklen[7]
pklen[6]
pklen[5]
pklen[4]
pklen[3]
pklen[2]
pklen[1]
pklen[0]
00h
4F
R/W
ADC8 Control
Reserved
Reserved
adc8[5]
adc8[4]
adc8[3]
adc8[2]
adc8[1]
adc8[0]
10h
60
Reserved
62
R/W
Crystal Oscillator/Control Test
pwst[2]
pwst[1]
pwst[0]
clkhyst
enbias2x
enamp2x
bufovr
enbuf
24h
6D
R/W
TX Power
papeakval
papeaken
papeaklvl[1]
papeaklvl[0]
Ina_sw
txpow[2]
txpow[1]
txpow[0]
18h
6E
R/W
TX Data Rate 1
txdr[15]
txdr[14]
txdr[13]
txdr[12]
txdr[11]
txdr[10]
txdr[9]
txdr[8]
0Ah
6F
R/W
TX Data Rate 0
txdr[7]
txdr[6]
txdr[5]
txdr[4]
txdr[3]
txdr[2]
txdr[1]
txdr[0]
3Dh
70
R/W
Modulation Mode Control 1
Reserved
Reserved
txdtrtscale
enphpwdn
manppol
enmaninv
enmanch
enwhite
0Ch
71
R/W
Modulation Mode Control 2
trclk[1]
trclk[0]
dtmod[1]
dtmod[0]
eninv
fd[8]
modtyp[1]
modtyp[0]
00h
72
R/W
Frequency Deviation
fd[7]
fd[6]
fd[5]
fd[4]
fd[3]
fd[2]
fd[1]
fd[0]
20h
73
R/W
Frequency Offset 1
fo[7]
fo[6]
fo[5]
fo[4]
fo[3]
fo[2]
fo[1]
fo[0]
00h
74
R/W
Frequency Offset 2
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
fo[9]
fo[8]
00h
75
R/W
Frequency Band Select
Reserved
sbsel
hbsel
fb[4]
fb[3]
fb[2]
fb[1]
fb[0]
75h
76
R/W
Nominal Carrier Frequency 1
fc[15]
fc[14]
fc[13]
fc[12]
fc[11]
fc[10]
fc[9]
fc[8]
BBh
77
R/W
Nominal Carrier Frequency 0
fc[7]
fc[6]
fc[5]
fc[4]
fc[3]
fc[2]
fc[1]
fc[0]
80h
79
R/W
Frequency Hopping Channel
Select
fhch[7]
fhch[6]
fhch[5]
fhch[4]
fhch[3]
fhch[2]
fhch[1]
fhch[0]
00h
7A
R/W
Frequency Hopping Step Size
fhs[7]
fhs[6]
fhs[5]
fhs[4]
fhs[3]
fhs[2]
fhs[1]
fhs[0]
00h
7C
R/W
TX FIFO Control 1
Reserved
Reserved
txafthr[5]
txafthr[4]
txafthr[3]
txafthr[2]
txafthr[1]
txafthr[0]
37h
7D
R/W
TX FIFO Control 2
Reserved
Reserved
txaethr[5]
txaethr[4]
txaethr[3]
txaethr[2]
txaethr[1]
txaethr[0]
04h
fifod[4]
fifod[3]
fifod[2]
fifod[1]
fifod[0]
—
7E
Reserved
7F
R/W
2
FIFO Access
fifod[7]
fifod[6]
fifod[5]
Rev 0.1
AN466
2. Detailed Register Descriptions
Register 01h. Version Code (VC)
Bit
D7
D6
D5
D4
D3
D2
Name
Reserved
vc[4:0]
Type
R
R
D1
D0
D1
D0
Reset value = xxxxxxxx
Bit
Name
7:5
Reserved
4:0
vc[4:0]
Function
Reserved.
Version Code.
Code indicating the version of the chip.
Rev B1: 00110
Register 02h. Device Status
Bit
D7
D6
D5
D4
D3
D2
Name
ffovfl
ffunfl
Reserved
Reserved
Reserved
Reserved
cps[1:0]
Type
R
R
R
R
R
R
R
Reset value = xxxxxxxx
Bit
Name
Function
7
ffovfl
TX FIFO Overflow Status.
6
ffunfl
TX FIFO Underflow Status.
5:4
Reserved
Reserved.
3:2
Reserved
Reserved.
1:0
cps[1:0]
Chip Power State.
00:
Idle State
10:
TX State
Rev 0.1
3
AN466
Register 03h. Interrupt/Status 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
ifferr
itxffafull
ixtffaem
Reserved
iext
ipksent
Reserved
Reserved
Type
R
R
R
R
R
R
R
R
Reset value = xxxxxxxx
Bit
Name
Function
7
ifferr
6
itxffafull
TX FIFO Almost Full.
When set to 1 the TX FIFO has met its almost full threshold and needs to be transmitted.
5
itxffaem
TX FIFO Almost Empty.
When set to 1 the TX FIFO is almost empty and needs to be filled.
4
Reserved
3
iext
2
ipksent
1:0
Reserved
FIFO Underflow/Overflow Error.
When set to 1 the TX FIFO has overflowed or underflowed.
Reserved.
External Interrupt.
When set to 1 an interrupt occurred on one of the GPIO’s if it is programmed so. The status can be checked in register 0Eh. See GPIOx Configuration section for the details.
Packet Sent Interrupt.
When set to1 a valid packet has been transmitted.
Reserved.
When any of the Interrupt/Status 1 bits change state from 0 to 1 the device will notify the microcontroller by setting
the nIRQ pin LOW if it is enabled in the Interrupt Enable 1 register. The nIRQ pin will go to HIGH and all the
enabled interrupt bits will be cleared when the microcontroller reads this address. If any of these bits is not enabled
in the Interrupt Enable 1 register then it becomes a status signal that can be read anytime in the same location and
will not be cleared by reading the register.
4
Rev 0.1
AN466
Table 2. Interrupt or Status 1 Bit Set/Clear Description
Bit
Status
Name
7
ifferr
6
itxffafull
Set when the number of bytes written to TX FIFO is greater than the Almost Full threshold.
Automatically cleared at the start of transmission when the number of bytes in the FIFO is
less than or equal to the threshold.
5
itxffaem
Set when the number of bytes in the TX FIFO is less than or equal to the Almost Empty
threshold. Automatically cleared when the number of data bytes in the TX FIFO is above the
Almost Empty threshold.
4
Set if there is a FIFO overflow or underflow. Cleared by applying FIFO reset.
Reserved Reserved.
3
iext
2
ipksent
1:0
Set/Clear Conditions
External interrupt source.
Set once a packet is successfully sent (no TX abort). Cleared upon leaving FIFO mode or at
the start of a new transmission.
Reserved Reserved.
Table 3. When are Individual Status Bits Set/Cleared if not Enabled as Interrupts?
Bit
Status
Name
Set/Clear Conditions
7
ifferr
6
itxffafull
Will be set when the number of bytes written to TX FIFO is greater than the Almost Full
threshold set by SPI. It is automatically cleared when we start transmitting and the FIFO
data is read out and the number of bytes left in the FIFO is smaller or equal to the threshold).
5
itxffaem
Will be set when the number of bytes (not yet transmitted) in TX FIFO is smaller or equal
than the Almost Empty threshold set by SPI. It is automatically cleared when we write
enough data to TX FIFO so that the number of data bytes not yet transmitted is above the
Almost Empty threshold.
4
Reserved
3
iext
2
ipksent
1:0
Reserved
Set if there is a FIFO Overflow or Underflow. It is cleared only by applying FIFO reset to
the specific FIFO that caused the condition.
Reserved.
External interrupt source
Will go high once a packet is sent all the way through (no TX abort). This status will be
cleaned if 1) We leave FIFO mode or 2) In FIFO mode we start a new transmission.
Reserved.
Register 04h. Interrupt/Status 2
Bit
D7
D6
D5
D4
Rev 0.1
D3
D2
D1
D0
5
AN466
Register 04h. Interrupt/Status 2
Name
Reserved
iwut
ilbd
ichiprdy
ipor
Type
R
R
R
R
R
Reset value = xxxxxxxx
Bit
Name
Function
7:4
Reserved
3
iwut
Wake-Up-Timer.
On the expiration of programmed wake-up timer this bit will be set to 1.
2
ilbd
Low Battery Detect.
When a low battery event is been detected this bit will be set to 1. This interrupt event is
saved even if it is not enabled by the mask register bit and causes an interrupt after it is
enabled.
1
ichiprdy
0
ipor
Reserved
Chip Ready (XTAL).
When a chip ready event has been detected this bit will be set to 1.
Power-on-Reset (POR).
When the chip detects a Power on Reset above the desired setting this bit will be set to 1.
When any of the Interrupt/Status Register 2 bits change state from 0 to 1 the control block will notify the
microcontroller by setting the nIRQ pin LOW if it is enabled in the Interrupt Enable 2 register. The nIRQ pin will go
to HIGH and all the enabled interrupt bits will be cleared when the microcontroller reads this address. If any of
these bits is not enabled in the Interrupt Enable 2 register then it becomes a status signal that can be read anytime
in the same location and will not be cleared by reading the register.
6
Rev 0.1
AN466
Table 4. Interrupt or Status 2 Bit Set/Clear Description
Bit
7:4
Status
Name
Set/Clear Conditions
Reserved Reserved.
3
iwut
Wake time timer interrupt. Use as an interrupt, not as a status.
2
ilbd
Low Battery Detect. When a low battery event is been detected this bit will be set to 1. This
interrupt event is saved even if it is not enabled by the mask register bit and causes an interrupt after it is enabled. Probably the status is cleared once the battery is replaced.
1
ichiprdy
0
ipor
Chip ready goes high once we enable the xtal, TX and a settling time for the Xtal clock
elapses. The status stay high unless we go back to Idle mode.
Power on status.
Table 5. Detailed Description of Status Registers when not Enabled as Interrupts
Bit
Status
Name
Set/Clear Conditions
7:4
Reserved
3
iwut
Wake time timer interrupt. Use as an interrupt, not as a status.
2
ilbd
Low Battery Detect. When a low battery event is been detected this bit will be set to 1. This
interrupt event is saved even if it is not enabled by the mask register bit and causes an
interrupt after it is enabled. Probably the status is cleared once the battery is replaced.
1
ichiprdy
0
ipor
Reserved.
Chip ready goes high once we enable the xtal, TX, and a settling time for the Xtal clock
elapses. The status stay high unless we go back to Idle mode.
Power on status.
Rev 0.1
7
AN466
Register 05h. Interrupt Enable 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
enfferr
entxffafull
entxffaem
Reserved
enext
enpksent
Reserved
Reserved
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset value = 00000000
Bit
Name
Function
7
enfferr
6
entxffafull
Enable TX FIFO Almost Full.
When set to 1 the TX FIFO Almost Full interrupt will be enabled.
5
entxffaem
Enable TX FIFO Almost Empty.
When set to 1 the TX FIFO Almost Empty interrupt will be enabled.
4
Reserved
Reserved.
3
enext
2
enpksent
Enable Packet Sent.
When ipksent =1 the Packet Sense Interrupt will be enabled.
1:0
Reserved
Reserved.
Enable FIFO Underflow/Overflow.
When set to 1 the FIFO Underflow/Overflow interrupt will be enabled.
Enable External Interrupt.
When set to 1 the External Interrupt will be enabled.
Register 06h. Interrupt Enable 2
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
enwut
enlbd
enchiprdy
enpor
Type
R
R/W
R/W
R/W
R/W
Reset value = 00000011
8
Bit
Name
Function
7:4
Reserved
3
enwut
Enable Wake-Up Timer.
When set to 1 the Wake-Up Timer interrupt will be enabled.
2
enlbd
Enable Low Battery Detect.
When set to 1 the Low Battery Detect interrupt will be enabled.
1
enchiprdy
0
enpor
Reserved.
Enable Chip Ready (XTAL).
When set to 1 the Chip Ready interrupt will be enabled.
Enable POR.
When set to 1 the POR interrupt will be enabled.
Rev 0.1
AN466
Register 07h. Operating Mode and Function Control 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
swres
enlbd
enwt
x32ksel
txon
Reserved
pllon
xton
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset value = 00000001
Bit
Name
Function
7
swres
Software Register Reset Bit.
This bit may be used to reset all registers simultaneously to a DEFAULT state, without the
need for sequentially writing to each individual register. The RESET is accomplished by
setting swres = 1. This bit will be automatically cleared.
6
enlbd
Enable Low Battery Detect.
When this bit is set to 1 the Low Battery Detector circuit and threshold comparison will be
enabled.
5
enwt
Enable Wake-Up-Timer.
Enabled when enwt = 1. If the Wake-up-Timer function is enabled it will operate in any
mode and notify the microcontroller through the GPIO interrupt when the timer expires.
4
x32ksel
3
txon
2
Reserved
1
pllon
TUNE Mode (PLL is ON).
When pllon = 1 the PLL will remain enabled in Idle State. This will for faster turn-around
time at the cost of increased current consumption in Idle State.
0
xton
READY Mode (Xtal is ON).
32,768 kHz Crystal Oscillator Select.
0:
RC oscillator
1:
32 kHz crystal
TX on in Manual Transmit Mode.
Automatically cleared in FIFO mode once the packet is sent. Transmission can be
aborted during packet transmission, however, when no data has been sent yet, transmission can only be aborted after the device is programmed to “unmodulated carrier” ("Register 71h. Modulation Mode Control 2").
Reserved.
Rev 0.1
9
AN466
Register 08h. Operating Mode and Function Control 2
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
autotx
Reserved
ffclrtx
Type
R/W
R/W
R/W
R/W
Reset value = 00000000
Bit
Name
7:4
Reserved
3
autotx
2:1
Reserved
0
ffclrtx
Function
Reserved.
Automatic Transmission.
When autotx = 1 the transceiver will enter automatically TX State when the FIFO is
almost full. When the FIFO is empty it will automatically return to the Idle State.
Reserved.
TX FIFO Reset/Clear.
This has to be a two writes operation: Setting ffclrtx =1 followed by ffclrtx = 0 will clear the
contents of the TX FIFO.
Register 09h. 30 MHz Crystal Oscillator Load Capacitance
Bit
D7
D6
D5
D4
D3
Name
xtalshft
xlc[6:0]
Type
R/W
R/W
D2
D1
D0
Reset value = 01111111
10
Bit
Name
Function
7
xtalshft
Additional capacitance to course shift the frequency if xlc[6:0] is not sufficient. Not binary
with xlc[6:0].
6:0
xlc[6:0]
Tuning Capacitance for the 30 MHz XTAL.
Rev 0.1
AN466
Register 0Ah. Microcontroller Output Clock
Bit
D7
D6
D5
D4
D3
D2
D1
Name
Reserved
clkt[1:0]
enlfc
mclk[2:0]
Type
R
R/W
R/W
R/W
D0
Reset value = xx000110
Bit
Name
Function
7:6
Reserved
5:4
clkt[1:0]
Clock Tail.
If enlfc = 0 then it can be useful to provide a few extra cycles for the microcontroller to
complete its operation. Setting the clkt[1:0] register will provide the addition cycles of the
clock before it shuts off.
00:
0 cycle
01:
128 cycles
10:
256 cycles
11:
512 cycles
3
enlfc
Enable Low Frequency Clock.
When enlfc = 1 and the chip is in Sleep mode then the 32.768 kHz clock will be provided
to the microcontroller no matter what the selection of mclk[2:0] is. For example if
mclk[2:0] = ‘000’, 30 MHz will be available through the GPIO to output to the microcontroller in all Idle or TX states. When the chip is commanded to Sleep mode the 30 MHz
clock will become 32.768 kHz.
2:0
mclk[2:0]
Microcontroller Clock.
Different clock frequencies may be selected for configurable GPIO clock output. All clock
frequencies are created by dividing the XTAL except for the 32 kHz clock which comes
directly from the 32 kHz RC Oscillator. The mclk[2:0] setting is only valid when xton = 1
except the 111.
000:
30 MHz
001:
15 MHz
010:
10 MHz
011:
4 MHz
100:
3 MHz
101:
2 MHz
110:
1 MHz
111:
32.768 kHz
Reserved.
Rev 0.1
11
AN466
Register 0Bh. GPIO Configuration 0
Bit
D7
D6
D5
D4
D3
D2
Name
gpiodrv0[1:0]
pup0
gpio0[4:0]
Type
R/W
R/W
R/W
D1
D0
Reset value = 00000000
Bit
7:6
Name
gpiodrv0[1:0] GPIO Driving Capability Setting.
5
pup0
4:0
gpio0[4:0]
12
Function
Pullup Resistor Enable on GPIO0.
When set to 1 the a 200 kresistor is connected internally between VDD and the pin if the
GPIO is configured as a digital input.
GPIO0 pin Function Select.
00000:
Power-On-Reset (output)
00001:
Wake-Up Timer: 1 when WUT has expired (output)
00010:
Low Battery Detect: 1 when battery is below threshold setting (output)
00011:
Direct Digital Input
00100:
External Interrupt, falling edge (input)
00101:
External Interrupt, rising edge (input)
00110:
External Interrupt, state change (input)
00111:
ADC Analog Input
01000:
Reserved (Analog Test N Input)
01001:
Reserved (Analog Test P Input)
01010:
Direct Digital Output
01011:
Reserved (Digital Test Output)
01100:
Reserved (Analog Test N Output)
01101:
Reserved (Analog Test P Output)
01110:
Reference Voltage (output)
01111:
TX Data CLK output to be used in conjunction with TX Data pin (output)
10000:
TX Data input for direct modulation (input)
10001:
External Retransmission Request (input)
10010:
TX State (output)
10011:
TX FIFO Almost Full (output)
10100:
Reserved
10101:
Reserved
10110:
Reserved
10111:
Reserved
11000:
Reserved
11001:
Reserved
11010:
Reserved
11011:
Reserved
11100:
Reserved
11101:
VDD
else :
GND
Rev 0.1
AN466
Register 0Ch. GPIO Configuration 1
Bit
D7
D6
D5
D4
D3
D2
Name
gpiodrv1[1:0]
pup1
gpio1[4:0]
Type
R/W
R/W
R/W
D1
D0
Reset value = 00000000
Bit
7:6
Name
Function
gpiodrv1[1:0] GPIO Driving Capability Setting.
5
pup1
4:0
gpio1[4:0]
Pullup Resistor Enable on GPIO1.
When set to 1 the a 200 kresistor is connected internally between VDD and the pin if the
GPIO is configured as a digital input.
GPIO1 pin Function Select.
00000:
Inverted Power-On-Reset (output)
00001:
Wake-Up Timer: 1 when WUT has expired (output)
00010:
Low Battery Detect: 1 when battery is below threshold setting (output)
00011:
Direct Digital Input
00100:
External Interrupt, falling edge (input)
00101:
External Interrupt, rising edge (input)
00110:
External Interrupt, state change (input)
00111:
ADC Analog Input
01000:
Reserved (Analog Test N Input)
01001:
Reserved (Analog Test P Input)
01010:
Direct Digital Output
01011:
Reserved (Digital Test Output)
01100:
Reserved (Analog Test N Output)
01101:
Reserved (Analog Test P Output)
01110:
Reference Voltage (output)
01111:
TX Data CLK output to be used in conjunction with TX Data pin (output)
10000:
TX Data input for direct modulation (input)
10001:
External Retransmission Request (input)
10010:
TX State (output)
10011:
TX FIFO Almost Full (output)
10100:
Reserved
10101:
Reserved
10110:
Reserved
10111:
Reserved
11000:
Reserved
11001:
Reserved
11010:
Reserved
11011:
Reserved
11100:
Reserved
11101:
VDD
else :
GND
Rev 0.1
13
AN466
Register 0Dh. GPIO Configuration 2
Bit
D7
D6
D5
D4
D3
D2
Name
gpiodrv2[1:0]
pup2
gpio2[4:0]
Type
R/W
R/W
R/W
D1
D0
Reset value = 00000000
Bit
7:6
Name
gpiodrv2[1:0] GPIO Driving Capability Setting.
5
pup2
4:0
gpio2[4:0]
14
Function
Pullup Resistor Enable on GPIO2.
When set to 1 the a 200 kresistor is connected internally between VDD and the pin if the
GPIO is configured as a digital input.
GPIO2 pin Function Select.
00000:
Microcontroller Clock
00001:
Wake-Up Timer: 1 when WUT has expired (output)
00010:
Low Battery Detect: 1 when battery is below threshold setting (output)
00011:
Direct Digital Input
00100:
External Interrupt, falling edge (input)
00101:
External Interrupt, rising edge (input)
00110:
External Interrupt, state change (input)
00111:
ADC Analog Input
01000:
Reserved (Analog Test N Input)
01001:
Reserved (Analog Test P Input)
01010:
Direct Digital Output
01011:
Reserved (Digital Test Output)
01100:
Reserved (Analog Test N Output)
01101:
Reserved (Analog Test P Output)
01110:
Reference Voltage (output)
01111:
TX Data CLK output to be used in conjunction with TX Data pin (output)
10000:
TX Data input for direct modulation (input)
10001:
External Retransmission Request (input)
10010:
TX State (output)
10011:
TX FIFO Almost Full (output)
10100:
Reserved
10101:
Reserved
10110:
Reserved
10111:
Reserved
11000:
Reserved
11001:
Reserved
11010:
Reserved
11011:
Reserved
11100:
Reserved
11101:
VDD
else :
GND
Rev 0.1
AN466
Register 0Eh. I/O Port Configuration
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
extitst[2]
extitst[1]
extitst[0]
itsdo
dio2
dio1
dio0
Type
R
R
R
R
R/W
R/W
R/W
R/W
Reset value = 00000000
Bit
Name
Function
7
Reserved
Reserved.
6
extitst[2]
External Interrupt Status.
If the GPIO2 is programmed to be external interrupt sources then the status can be read
here.
5
extitst[1]
External Interrupt Status.
If the GPIO1 is programmed to be external interrupt sources then the status can be read
here.
4
extitst[0]
External Interrupt Status.
If the GPIO0 is programmed to be external interrupt sources then the status can be read
here.
3
itsdo
Interrupt Request Output on the SDO Pin.
nIRQ output is present on the SDO pin if this bit is set and the nSEL input is inactive (high).
2
dio2
Direct I/O for GPIO2.
If the GPIO2 is configured to be a direct output then the value on the GPIO pin can be set
here. If the GPIO2 is configured to be a direct input then the value of the pin can be read
here.
1
dio1
Direct I/O for GPIO1.
If the GPIO1 is configured to be a direct output then the value on the GPIO pin can be set
here. If the GPIO1 is configured to be a direct input then the value of the pin can be read
here.
0
dio0
Direct I/O for GPIO0.
If the GPIO0 is configured to be a direct output then the value on the GPIO pin can be set
here. If the GPIO0 is configured to be a direct input then the value of the pin can be read
here.
Rev 0.1
15
AN466
Register 0Fh. ADC Configuration
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
adcstart/
adcdone
adcsel[2:0]
adcref[1:0]
adcgain[1:0]
Type
R/W
R/W
R/W
R/W
Reset value = 00000000
Bit
7
16
Name
Function
adcstart/adc- ADC Measurement Start Bit.
done
Reading this bit gives 1 if the ADC measurement cycle has been finished.
6:4
adcsel[2:0]
ADC Input Source Selection.
The internal 8-bit ADC input source can be selected as follows:
000:
Internal Temperature Sensor
001:
GPIO0, single-ended
010:
GPIO1, single-ended
011:
GPIO2, single-ended
100:
GPIO0(+) – GPIO1(–), differential
101:
GPIO1(+) – GPIO2(–), differential
110:
GPIO0(+) – GPIO2(–), differential
111:
GND
3:2
adcref[1:0]
ADC Reference Voltage Selection.
The reference voltage of the internal 8-bit ADC can be selected as follows:
0X:
bandgap voltage (1.2 V)
10:
VDD/3
11:
VDD/2
1:0
adcgain[1:0]
ADC Sensor Amplifier Gain Selection.
The full scale range of the internal 8-bit ADC in differential mode (see adcsel) can be set
as follows:
adcref[0] = 0: adcref[0] = 1:
FS = 0.014 x (adcgain[1:0] + 1) x VDD FS = 0.021 x (adcgain[1:0] + 1) x VDD
Rev 0.1
AN466
Register 10h. ADC Sensor Amplifier Offset
Bit
D7
D6
D5
D4
D3
D2
D1
Name
Reserved
adcoffs[3:0]
Type
R
R/W
D0
Reset value = xxxx0000
Bit
Name
7:4
Reserved
3:0
adcoffs[3:0]
Function
Reserved.
ADC Sensor Amplifier Offset*.
*Note: The offset can be calculated as Offset = adcoffs[2:0] x VDD/1000; MSB = adcoffs[3] = Sign bit.
Register 11h. ADC Value
Bit
D7
D6
D5
D4
D3
Name
adc[7:0]
Type
R
D2
D1
D0
Reset value = xxxxxxxx
Bit
Name
7:0
adc[7:0]
Function
Internal 8 bit ADC Output Value.
Rev 0.1
17
AN466
Register 12h. Temperature Sensor Calibration
Bit
D7
D6
D5
D4
D3
D2
D1
Name
tsrange[1:0]
entsoffs
entstrim
tstrim[3:0]
Type
R/W
R/W
R/W
R/W
D0
Reset value = 00100000
Bit
Name
Function
7:6
tsrange[1:0]
Temperature Sensor Range Selection.
(FS range is 0..1024 mV)
00:
–40 C .. 64 C (full operating range), with 0.5 C resolution (1 LSB in the 8-bit
ADC)
01:
–40 C .. 85 C, with 1 C resolution (1 LSB in the 8-bit ADC)
11:
0 C .. 85 C, with 0.5 C resolution (1 LSB in the 8-bit ADC)
10:
–40 F .. 216 F, with 1 F resolution (1 LSB in the 8-bit ADC)
5
entsoffs
Temperature Sensor Offset to Convert from K to ºC.
4
entstrim
Temperature Sensor Trim Enable.
3:0
tstrim[3:0]
Temperature Sensor Trim Value.
Register 13h. Temperature Value Offset
Bit
D7
D6
D5
D4
D3
Name
tvoffs[7:0]
Type
R/W
D2
D1
Reset value = 00000000
18
Bit
Name
7:0
tvoffs[7:0]
Function
Temperature Value Offset.
This value is added to the measured temperature value. (MSB, tvoffs[8]: sign bit)
Rev 0.1
D0
AN466
Note: If a new configuration is needed (e.g., for the WUT or the LDC), proper functionality is required. The
function must first be disabled, then the settings changed, then enabled back on.
Register 14h. Wake-Up Timer Period 1
Bit
D7
D6
D5
D4
D3
D2
Name
Reserved
wtr[4:0]
Type
R/W
R/W
D1
D0
Reset value = xxx00011
Bit
Name
7:5
Reserved
4:0
wtr[4:0]
Function
Reserved.
Wake Up Timer Exponent (R) Value*.
Maximum value for R is decimal 20. A value greater than 20 will yield a result as if 20
were written. R Value = 0 can be written here.
*Note: The period of the wake-up timer can be calculated as TWUT = (4 x M x 2R)/32.768 ms. R = 0 is allowed, and the
maximum value for R is decimal 20. A value greater than 20 will result in the same as if 20 was written.
Register 15h. Wake-Up Timer Period 2
Bit
D7
D6
D5
D4
D3
Name
wtm[15:8]
Type
R/W
D2
D1
D0
D1
D0
Reset value = 00000000
Bit
Name
7:0
wtm[15:8]
Function
Wake Up Timer Mantissa (M) Value*.
*Note: The period of the wake-up timer can be calculated as TWUT = (4 x M x 2R)/32.768 ms.
Register 16h. Wake-Up Timer Period 3
Bit
D7
D6
D5
D4
D3
Name
wtm[7:0]
Type
R/W
D2
Reset value = 00000001
Bit
Name
7:0
wtm[7:0]
Function
Wake Up Timer Mantissa (M) Value*.
M[7:0] = 0 is not valid here. Write at least decimal 1.
*Note: The period of the wake-up timer can be calculated as TWUT = (4 x M x 2R)/32.768 ms.
Rev 0.1
19
AN466
Register 17h. Wake-Up Timer Value 1
Bit
D7
D6
D5
D4
D3
Name
wtm[15:8]
Type
R
D2
D1
D0
D1
D0
Reset value = xxxxxxxx
Bit
Name
7:0
wtm[15:8]
Function
Wake Up Timer Current Mantissa (M) Value*.
*Note: The period of the wake-up timer can be calculated as TWUT = (4 x M x 2R)/32.768 ms.
Register 18h. Wake-Up Timer Value 2
Bit
D7
D6
D5
D4
D3
Name
wtm[7:0]
Type
R
D2
Reset value = xxxxxxxx
Bit
Name
7:0
wtm[7:0]
Function
Wake Up Timer Current Mantissa (M) Value*.
*Note: The period of the wake-up timer can be calculated as TWUT = (4 x M x 2R)/32.768 ms.
20
Rev 0.1
AN466
Register 1Ah. Low Battery Detector Threshold
Bit
D7
D6
D5
D4
D3
D2
Name
Reserved
lbdt[4:0]
Type
R
R/W
D1
D0
Reset value = xxx10100
Bit
Name
7:5
Reserved
4:0
lbdt[4:0]
Function
Reserved.
Low Battery Detector Threshold.
This threshold is compared to Battery Voltage Level. If the Battery Voltage is less than the
threshold the Low Battery Interrupt is set. Default = 2.7 V.*
*Note: The threshold can be calculated as Vthreshold = 1.7 + lbdt x 50 mV.
Register 1Bh. Battery Voltage Level
Bit
D7
D6
D5
D4
D3
D2
Name
Reserved
vbat[4:0]
Type
R
R
D1
D0
Reset value = xxxxxxxx
Bit
Name
Function
7:5
Reserved
Reserved.
4:0
vbat[4:0]
Battery Voltage Level.
The battery voltage is converted by a 5 bit ADC. In Sleep Mode the register is updated in
every 1 s. In other states it measures continuously.
Rev 0.1
21
AN466
Register 30h. Data Access Control
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
lsbfrst
crcdonly
Reserved
enpactx
encrc
crc[1:0]
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset value = 10001101
22
Bit
Name
Function
7
Reserved
6
lsbfrst
5
crcdonly
CRC Data Only Enable.
When this bit is set to 1 the CRC is calculated on the packet data fields only.
4
Reserved
Reserved.
3
enpactx
2
encrc
1:0
crc[1:0]
Reserved.
LSB First Enable.
The LSB of the data will be transmitted first if this bit is set.
Enable Packet TX Handling.
If FIFO Mode (dtmod = 10) is being used automatic packet handling may be enabled.
Setting enpactx = 1 will enable automatic packet handling in the TX path. Register 30–4D
allow for various configurations of the packet structure. Setting enpactx = 0 will not do
any packet handling in the TX path. It will only transmit what is loaded to the FIFO.
CRC Enable.
Cyclic Redundancy Check generation is enabled if this bit is set.
CRC Polynomial Selection.
00:
CCITT
01:
CRC-16 (IBM)
10:
IEC-16
11:
Biacheva
Rev 0.1
AN466
Register 31h. EZMAC® Status
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
pktx
pksent
Type
R
R
R
Reset value = 00000000
Bit
Name
7:2
Reserved
1
pktx
0
pksent
Function
Reserved.
Packet Transmitting.
When pktx = 1 the radio is currently transmitting a packet.
Packet Sent.
A pksent = 1 a packet has been sent by the radio. (Same bit as in register 03, but reading
it does not reset the IRQ)
Rev 0.1
23
AN466
Register 33h. Header Control 2
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
hdlen[2:0]
fixpklen
synclen[1:0]
prealen[8]
Type
R
R/W
R/W
R/W
R/W
Reset value = 00100010
24
Bit
Name
Function
7
Reserved
Reserved.
6:4
hdlen[2:0]
Header Length.
Length of header used if packet handler is enabled for TX (enpactx). Headers are transmitted in descending order.
000:
No TX header
001:
Header 3
010:
Header 3 and 2
011:
Header 3 and 2 and 1
100:
Header 3 and 2 and 1 and 0
3
fixpklen
Fix Packet Length.
When fixpklen = 1 the packet length (pklen[7:0]) is not included in the header. When fixpklen = 0 the packet length is included in the header.
2:1
synclen[1:0]
Synchronization Word Length.
The value in this register corresponds to the number of bytes used in the Synchronization
Word. The synchronization word bytes are transmitted/received in descending order.
00:
Synchronization Word 3
01:
Synchronization Word 3 followed by 2
10:
Synchronization Word 3 followed by 2 followed by 1
11:
Synchronization Word 3 followed by 2 followed by 1 followed by 0
0
prealen[8]
MSB of Preamble Length.
See register Preamble Length.
Rev 0.1
AN466
Register 34h. Preamble Length
Bit
D7
D6
D5
D4
D3
Name
prealen[7:0]
Type
R/W
D2
D1
D0
Reset value = 00001000
Bit
Name
Function
7:0
prealen[7:0]
Preamble Length.
The value in the prealen[8:0] register corresponds to the number of nibbles (4 bits) in the
packet. For example prealen[8:0] = ‘000001000’ corresponds to a preamble length of 32
bits (8 x 4bits) or 4 bytes. The maximum preamble length is prealen[8:0] = 111111111
which corresponds to a 255 bytes Preamble. Writing 0 will have the same result as if writing 1, which corresponds to one single nibble of preamble.
Rev 0.1
25
AN466
Register 36h. Synchronization Word 3
Bit
D7
D6
D5
D4
D3
Name
sync[31:24]
Type
R/W
D2
D1
D0
D2
D1
D0
D2
D1
D0
Reset value = 00101101
Bit
Name
7:0
sync[31:24]
Function
Synchronization Word 3.
4th byte of the synchronization word.
Register 37h. Synchronization Word 2
Bit
D7
D6
D5
D4
D3
Name
sync[23:16]
Type
R/W
Reset value = 11010100
Bit
Name
7:0
sync[23:16]
Function
Synchronization Word 2.
3rd byte of the synchronization word.
Register 38h. Synchronization Word 1
Bit
D7
D6
D5
D4
D3
Name
sync[15:8]
Type
R/W
Reset value = 00000000
26
Bit
Name
7:0
sync[15:8]
Function
Synchronization Word 1.
2nd byte of the synchronization word.
Rev 0.1
AN466
Register 39h. Synchronization Word 0
Bit
D7
D6
D5
D4
D3
Name
sync[7:0]
Type
R/W
D2
D1
D0
D2
D1
D0
D2
D1
D0
Reset value = 00000000
Bit
Name
7:0
sync[7:0]
Function
Synchronization Word 0.
1st byte of the synchronization word.
Register 3Ah. Transmit Header 3
Bit
D7
D6
D5
D4
D3
Name
txhd[31:24]
Type
R/W
Reset value = 00000000
Bit
Name
7:0
txhd[31:24]
Function
Transmit Header 3.
4th byte of the header to be transmitted.
Register 3Bh. Transmit Header 2
Bit
D7
D6
D5
D4
D3
Name
txhd[23:16]
Type
R/W
Reset value = 00000000
Bit
Name
7:0
txhd[23:16]
Function
Transmit Header 2.
3rd byte of the header to be transmitted.
Rev 0.1
27
AN466
Register 3Ch. Transmit Header 1
Bit
D7
D6
D5
D4
D3
Name
txhd[15:8]
Type
R/W
D2
D1
D0
D2
D1
D0
D2
D1
D0
Reset value = 00000000
Bit
Name
7:0
txhd[15:8]
Function
Transmit Header 1.
2nd byte of the header to be transmitted.
Register 3Dh. Transmit Header 0
Bit
D7
D6
D5
D4
D3
Name
txhd[7:0]
Type
R/W
Reset value = 00000000
Bit
Name
7:0
txhd[7:0]
Function
Transmit Header 0.
1st byte of the header to be transmitted.
Register 3Eh. Packet Length
Bit
D7
D6
D5
D4
D3
Name
pklen[7:0]
Type
R/W
Reset value = 00000000
28
Bit
Name
Function
7:0
pklen[7:0]
Packet Length.
The value in the pklen[7:0] register corresponds directly to the number of bytes in the
Packet. For example pklen[7:0] = ‘00001000’ corresponds to a packet length of 8 bytes.
The maximum packet length is pklen[7:0] = ‘11111111’, a 255 byte packet. Writing 0 is
possible, in this case we do not send any data in the packet.
Rev 0.1
AN466
Register 62h. Crystal Oscillator/Power-on-Reset Control
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
pwst[2:0]
clkhyst
enbias2x
enamp2x
bufovr
enbuf
Type
R
R/W
R/W
R/W
R/W
R/W
Reset value = xxx00100
Bit
Name
Function
7:5
pwst[2:0]
4
clkhyst
3
enbias2x
2 Times Higher Bias Current Enable.
2
enamp2x
2 Times Higher Amplification Enable.
1
bufovr
Output Buffer Enable Override.
If set to 1 then the enbuf bit controls the output buffer.
0: output buffer is controlled by the state machine.
1: output buffer is controlled by the enbuf bit.
0
enbuf
Output Buffer Enable.
This bit is active only if the bufovr bit is set to 1.
Internal Power States of the Chip.
LP:
000
RDY: 001
Tune: 011
TX:
010
Clock Hysteresis Setting.
Rev 0.1
29
AN466
Register 6Dh. TX Power
Bit
D7
D6
D5
D4
D3
D2
D1
Name
papeakval
papeaken
papeaklvl[1]
papeaklvl[0]
Reserved
txpow[2:0]
Type
R
R/W
R/W
R/W
R/W
R/W
D0
Reset value = x0011000
Bit
Name
Function
7
papeakval
Reserved.
6
papeaken
PA Peak Detector Value Read Register.
Reading a 1 in this register when the papeaken=1 then the PA drain voltage is too high
and the match network needs adjusting for optimal efficiency.
5
papeaklvl[1]
PA Peak Detector Enable.
4
papeaklvl[0]
PA Peak Detect Level (direct from register).
00 = 6.5
01 = 7
10 = 7.5
11 = 8
00 = default
3
Reserved
Reserved.
2:0
txpow[2:0]
TX Output Power.
The output power is configurable from –8 dBm to +13 dBm in ~3 dBm steps.
txpow[2:0] = 111 corresponds to +13 dBm and 000 to –8 dBm.
Register 6Eh. TX Data Rate 1
Bit
D7
D6
D5
D4
D3
Name
txdr[15:8]
Type
R/W
D2
D1
Reset value = 00001010
Bit
Name
7:0
txdr[15:8]
Function
Data Rate Upper Byte.
See formula above.
The data rate can be calculated as: TX_DR = 103 x txdr[15:0]/216 [kbps] (if address 70[5] = 0) or
The data rate can be calculated as: TX_DR = 103 x txdr[15:0]/221 [kbps] (if address 70[5] = 1)
30
Rev 0.1
D0
AN466
Register 6Fh. TX Data Rate 0
Bit
D7
D6
D5
D4
D3
Name
txdr[7:0]
Type
R/W
D2
D1
D0
Reset value = 00111101
Bit
Name
7:0
txdr[7:0]
Function
Data Rate Lower Byte.
See formula above. Defaults = 40 kbps.
Register 70h. Modulation Mode Control 1
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
txdtrtscale
enphpwdn
manppol
enmaninv
enmanch
enwhite
Type
R
R/W
R/W
R/W
R/W
R/W
R/W
Reset value = 00001100
Bit
Name
Function
7:6
Reserved
Reserved.
5
txdtrtscale
This bit should be set for Data Rates below 30 kbps.
4
enphpwdn
If set, the Packet Handler will be powered down when chip is in low power mode.
3
manppol
Manchester Preamble Polarity (will transmit a series of 1 if set, or series of 0 if
reset).
This bit affects only the transmitter side, not the receiver. This is valid only if Manchester
Mode is enabled.
2
enmaninv
Manchester Data Inversion is Enabled if this bit is set.
When this bit is low, a 10 pair is considered a Manchester 0, and a 01 pair as a Manchester 1. By setting this bit, do the opposite: every 10 will be considered as a 1, and
every 01 will be considered as a 0. This function is relevant only if the Manchester mode
is enabled.
1
enmanch
Manchester Coding is Enabled if this bit is set.
What Manchester coding does is to replace a single high bit (1) with two bits starting with
low followed by high (01) and a low bit (0) with a high bit followed by a low bit (10). When
Manchester is enabled, please configure as well the enmaninv at 70h bit [2] since it influences the Manchester encoding/decoding process.
0
enwhite
Data Whitening is Enabled if this bit is set.
Rev 0.1
31
AN466
Register 71h. Modulation Mode Control 2
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
trclk[1:0]
dtmod[1:0]
eninv
fd[8]
modtyp[1:0]
Type
R/W
R/W
R/W
R/W
R/W
Reset value = 00000000
Bit
Name
Function
7:6
trclk[1:0]
TX Data Clock Configuration.
00:
No TX Data CLK is available (asynchronous mode – Can only work with modulations FSK or OOK).
01:
TX Data CLK is available via the GPIO (one of the GPIO’s should be programmed
as well).
10:
TX Data CLK is available via the SDO pin.
11:
TX Data CLK is available via the nIRQ pin.
5:4
dtmod[1:0]
Modulation Source.
00:
Direct Mode using TX_Data function via the GPIO pin (one of the GPIO’s should
be programmed accordingly as well)
01:
Direct Mode using TX_Data function via the SDI pin (only when nSEL is high)
10:
FIFO Mode
11:
PN9 (internally generated)
3
eninv
TX Data.
2
fd[8]
MSB of Frequency Deviation Setting, see "Register 72h. Frequency Deviation".
1:0
modtyp[1:0]
Modulation Type.
00:
Unmodulated carrier
01:
OOK
10:
FSK
11:
GFSK (enable TX Data CLK (trclk[1:0]) when direct mode is used)
The frequency deviation can be calculated: Fd = 625 Hz x fd[8:0].
32
Rev 0.1
AN466
Register 72h. Frequency Deviation
Bit
D7
D6
D5
D4
D3
Name
fd[7:0]
Type
R/W
D2
D1
D0
Reset value = 00100000
Bit
Name
7:0
fd[7:0]
Function
Frequency Deviation Setting.
See formula above.
Note: It's recommended to use modulation index of 1 or higher (maximum allowable modulation index is 32). The modulation
index is defined by 2FN/FR were FD is the deviation and RB is the data rate. When Manchester coding is enabled the
modulation index is defined by FD/RB.
Register 73h. Frequency Offset 1
Bit
D7
D6
D5
D4
D3
Name
fo[7:0]
Type
R/W
D2
D1
D0
Reset value = 00000000
Bit
Name
7:0
fo[7:0]
Function
Frequency Offset Setting.
The frequency offset can be calculated as Offset = 156.25 Hz x (hbsel + 1) x fo[7:0].
fo[9:0] is a twos complement value.
Rev 0.1
33
AN466
Register 74h. Frequency Offset 2
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name
Reserved
fo[9:8]
Type
R
R/W
Reset value = 00000000
Bit
Name
7:2
Reserved
1:0
fo[9:8]
Function
Reserved.
Upper Bits of the Frequency Offset Setting.
fo[9] is the sign bit. The frequency offset can be calculated as Offset = 156.25 Hz x (hbsel
+ 1) x fo[7:0]. fo[9:0] is a twos complement value.
Register 75h. Frequency Band Select
Bit
D7
D6
D5
D4
D3
D2
Name
Reserved
sbsel
hbsel
fb[4:0]
Type
R
R/W
R/W
R/W
D1
D0
Reset value = 01110101
Bit
Name
Function
7
Reserved
6
sbsel
Side Band Select.
5
hbsel
High Band Select.
Setting hbsel = 1 will choose the frequency range from 480–960 MHz (high bands). Setting hbsel = 0 will choose the frequency range from 240–479.9 MHz (low bands).
4:0
fb[4:0]
Frequency Band Select.
Every increment corresponds to a 10 MHz Band for the Low Bands and a 20 MHz Band
for the High Bands. Setting fb[4:0] = 00000 corresponds to the 240–250 MHz Band for
hbsel = 0 and the 480–500 MHz Band for hbsel = 1. Setting fb[4:0] = 00001 corresponds
to the 250–260 MHz Band for hbsel = 0 and the 500–520 MHz Band for hbsel = 1.
Reserved.
The RF carrier frequency can be calculated as follows:
fcarrier = (fb+24+(fc+fo)/64000) x 10000 x (hbsel+1) + (fhch x fhs x 10) [kHz],
where parameters fc, fo, fb and hb_sel come from registers 73h–77h. Parameters fhch and fhs come from register
79h and 7Ah.
34
Rev 0.1
AN466
Register 76h. Nominal Carrier Frequency
Bit
D7
D6
D5
D4
D3
Name
fc[15:8]
Type
R/W
D2
D1
D0
D2
D1
D0
D2
D1
D0
Reset value = 10111011
Bit
Name
7:0
fc[15:8]
Function
Nominal Carrier Frequency Setting.
See formula above.
Register 77h. Nominal Carrier Frequency
Bit
D7
D6
D5
D4
D3
Name
fc[7:0]
Type
R/W
Reset value = 10000000
Bit
Name
7:0
fc[7:0]
Function
Nominal Carrier Frequency Setting.
See formula above.
Register 79h. Frequency Hopping Channel Select
Bit
D7
D6
D5
D4
D3
Name
fhch[7:0]
Type
R/W
Reset value = 00000000
Bit
Name
7:0
fhch[7:0]
Function
Frequency Hopping Channel Number.
Rev 0.1
35
AN466
Register 7Ah. Frequency Hopping Step Size
Bit
D7
D6
D5
D4
D3
Name
fhs[7:0]
Type
R/W
D2
D1
D0
Reset value = 00000000
Bit
Name
7:0
fhs[7:0]
Function
Frequency Hopping Step Size in 10 kHz Increments.
See formula for the nominal carrier frequency at "Register 76h. Nominal Carrier Frequency".
Register 7Ch. TX FIFO Control 1
Bit
D7
D6
D5
D4
D3
D2
Name
Reserved
txafthr[5:0]
Type
R/W
R/W
D1
D0
D1
D0
Reset value = 00110111
Bit
Name
Function
7:6
Reserved
Reserved.
5:0
txafthr[5:0]
TX FIFO Almost Full Threshold.
Register 7Dh. TX FIFO Control 2
Bit
D7
D6
D5
D4
D3
D2
Name
Reserved
txfaethr[5:0]
Type
R/W
R/W
Reset value = 00000100
36
Bit
Name
7:6
Reserved
5:0
txfaethr[5:0]
Function
Reserved.
TX FIFO Almost Empty Threshold.
Rev 0.1
AN466
Register 7Fh. FIFO Access
Bit
D7
D6
D5
D4
D3
Name
fifod[7:0]
Type
R/W
D2
D1
D0
Reset value = NA
Bit
Name
Function
7:0
fifod[7:0]
FIFO Data.
A Write (R/W = 1) to this Address will begin a Burst Write to the TX FIFO. The FIFO will
be loaded in the same manner as a Burst SPI Write but the SPI address will not be incremented. To conclude the TX FIFO Write the SEL pin should be brought HIGH, in the
same manner.
Rev 0.1
37
AN466
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