SX1223I073TRT Semtech, SX1223I073TRT Datasheet - Page 16

• Manufacturer Part Number: SX1223I073TRT
• Description: IC TX UHF 433/868/916 MHZ 24TQFN
• Manufacturer: Semtech

Specifications of SX1223I073TRT

• Frequency: 425 ~ 475MHz / 850 ~ 950MHz
• Applications: AMR, Home Automation, HQ Music and Data
• Modulation Or Protocol: FSK
• Data Rate - Maximum: 153.6 kbps
• Power - Output: 10dBm
• Current - Transmitting: 25.8mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-TQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Other names: SX1223I073TR

5.2.1
5.2
The SX1223 has several operating modes and configuration parameters which can be programmed by the user.
These modes and parameters are stored in a set of internal configuration registers that can be accessed by the
microcontroller through the 3-wire serial interface.
The detailed contents of the configuration registers are given in the next table. The value attached to each
parameter is the default value at power-up. All the undefined bits in the table below should be kept to 0.
The SX1223 can be programmed into four different modes by the Mode1 and Mode0 bits, as illustrated in Table 8.
© Semtech 2007
Add Bits
Address
0000000
0000001
0000010
0000011
0000100
0000101
0000110
0000111
0001000
0001001
0001010
0001011
0001100
0001101
0001110
0001111
0010000
0010001
0
A[6:0]
CONFIGURATION AND STATUS REGISTERS
Operating Modes
6-5
Default Value
D[7:0] Hex
0xDD
0x3F
0x7D
0x4B
0x0C
0x1A
0x02
0x02
0x00
0x76
0x00
0x22
0x02
0x00
0x76
0x00
0x22
0x20
Mode1
0
0
1
1
Table 7: Contents of the configuration registers and their values at power-on
Mode0
D7
-
-
-
-
-
-
-
-
-
-
Modulation [1:0]
0
1
0
1
Figure 8: Read sequence of configuration register.
VCO_IB [2:0]
Mode
Sleep mode
Standby mode
Synthesizer mode
Transmit mode
D6
-
-
-
-
-
-
-
-
-
Table 8: SX1223 Operating Modes
PA_IB [3:0]
Mode [1:0]
Mod_I [4:0]
Freq_Band
PAC_en
D5
-
-
-
-
16
XCO_Quick_
XCOcap_en
Prescal_s
Description
All blocks off, Register configuration kept (default)
Crystal oscillator enabled
Crystal oscillator, Frequency synthesizer enabled
Crystal oscillator, Frequency synthesizer, PA enabled
BRn [2:0]
Start
D4
-
-
-
-
N0 [7:0]
M0 [7:0]
N1 [7:0]
M1 [7:0]
Data
XCO_High_
PA [2:0]
LDO_en
VCO_by
Current
D3
RefClk_K [5:0]
A0 [5:0]
A1 [5:0]
OL_opamp_
CP_HI
D2
en
-
PAB_IB [3:0]
M0 [11:8]
N1 [11:8]
M1 [11:8]
N0 [11.8]
PA_LDc_en
Mod_A [2:0]
Mod_F [2:0]
ClkOut_en
D1
-
VCO_freq [1:0]
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SX1223
Sync_en
LD_en
D0
-