参数资料
型号: MC33493MOD315
厂商: Freescale Semiconductor
文件页数: 15/22页
文件大小: 0K
描述: BOARD EVALUATION FOR MC33493 TX
标准包装: 1
类型: 发射器
适用于相关产品: MC33493 315MHz 射频模块
所含物品: 模块和其他硬件
Complete Application Schematic and PCB for OOK Modulation
Vbat
SW1
SW1a
SW2
SW2a
Vbat
LED1
B1
C2
C3
C4
C5
R1
750
2.2nF
2.2nF
2.2nF
2.2nF
Vbat
U1
1
2
3
DATACLK
DATA
BAND
MODE
ENABLE
VCC
14
13
12
C7
22nF
1
2
3
4
5
PTA0
PTB0/MCLK
PTB1
PTB2/TCH0
PTB4/TCH1
U2
PTA1/KBD1
PTA2/KBD2
PTA3/KBD3
PTA4/KBD4
PTA5/KBD5
20
19
18
17
16
C6 8.2pF
13.56MHz
R2
12K
Y1
4
5
6
7
GND
XTAL1
XTAL0
REXT
MC33493
GNDRF
RFOUT
VCC
CFSK
11
10
9
8
C8
100pF
C9
2.2pF
6
7
8
9
PTB5
PTB3/TCLK
OSC1
OSC2
PTA6/KBD6
PTA7
RST
IRQ1
15
14
13
12
10
VSS
VDD
11
Vbat
MC68HC908RK2
C10
100nF
Figure 12. Application Schematic for OOK Modulation, 434 MHz Frequency Band
For 868 MHz band application, the input pin BAND must be wired to ground. See component description on Table 6 and
Table 7 .
Table 6. External Components Description for OOK
Component
Y1
R2
Function
Crystal,
see Table 7
RF output level setting
Value
315 MHz band: 9.84
434 MHz band: 13.56
868 MHz band: 13.56
12
Unit
MHz
MHz
MHz
k Ω
resistor (R ext )
C6
C7
C8
Crystal load capacitor
Power supply decoupling
capacitors
8.2 1
22
100
pF
nF
pF
1
C6 value equals recommended crystal load capacitance reduced by the PCB stray capacitances.
Examples of crystal reference are given below (see characteristics in Table 7 ) for different application bands:
?
?
at 315 MHz band (f reference = 9.84375 MHz, –40 °C < T A < 85 °C): NDK LN-G102-950,
at 434/868 MHz bands (f reference = 13.56 MHz, –40 °C < T A < 125 °C): NDK NX8045GB/CSJ S1-40125-8050-12
and NDK NX1255GA.
PLL Tuned UHF Transmitter for Data Transfer Applications, Rev. 1.7
Freescale Semiconductor
15
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