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参数资料
| 型号： | EVB7122-433-FSK-C |
| 厂商： | Melexis Technologies NV |
| 文件页数： | 4/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR TH7122 433MHZ |
| 标准包装： | 1 |
| 类型： | 收发器，TPMS，RKE |
| 频率： | 433MHz |
| 适用于相关产品： | TH7122 |
| 已供物品： | 板 |
EVB7122
27 to 930MHz Transceiver
Evaluation Board Description
1.4
Block Diagram
27
29
28
30
32
31
1
2
7
3 IN_DEM
6 OUT_DEM
PKDET
1.5pF
SW1
FSK Demodulator
bias
OA2
4
INT2/PDO
5
IN_LN A
26
LNA
MIX
IF
IFA
MIX
SW2
OA1
INT1
8
OUT_DTA
LO
200k
Control Logic
SCI
N
R
ASK
counter
counter
OUT_PA
25
PA
VCO
RO
RO
FSK
24 PS_PA
21 TNK_LO 20 VCC_PLL
23 LF
22 VEE_PLL 10 RO
11
19
9
12
13
15
16
17
18
14
Fig. 1:
TH7122 block diagram
1.5
User Mode Features
The transceiver can operate in two different user modes. It can be used either as a 3wire-bus-controlled
programmable or as a stand-alone fixed-frequency device. After power up, the transceiver is set to Stand-
alone User Mode (SUM). In this mode, pins FS0/SDEN and FS1/LD must be connected to V EE or V CC in
order to set the desired frequency of operation. There are 4 pre-defined frequency settings: 315MHz,
433.92MHz, 868.3MHz and 915MHz. The logic level at pin FS0/SDEN must not be changed after power up
in order to remain in fixed-frequency mode.
After the first logic level change at pin FS0/SDEN, the transceiver enters into Programmable User Mode
(PUM). In this mode, the user can set any PLL frequency or mode of operation by the SCI. In SUM pins
FS0/SDEN and FS1/LD are used to set the desired frequency, while in PUM pin FS0/SDEN is part of the
3-wire serial control interface (SCI) and pin FS1/LD is the look detector output signal of the PLL synthesizer.
A mode control logic allows several operating modes. In addition to standby, transmit and receive mode, two
idle modes can be selected to run either the reference oscillator only or the whole PLL synthesizer. The PLL
settings for the PLL idle mode are taken over from the last operating mode which can be either receive or
transmit mode.
The different operating modes can be set in SUM and PUM as well. In SUM the user can program the
transceiver via control pins RE/SCLK and TE/SDTA. In PUM the register bits OPMODE are used to select
the modes of operation while pins RE/SCLK and TE/SDTA are part of the SCI.
39012 07122 02
Rev. 006
Page 4 of 24
EVB Description
June/08
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EVB7122-868-ASK-A | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:27 to 930MHz Transceiver Evaluation Board Description |
| EVB7122-868-ASK-C | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:27 to 930MHz Transceiver Evaluation Board Description |
| EVB7122-868-FM-A | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:27 to 930MHz Transceiver Evaluation Board Description |
| EVB7122-868-FM-C | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:27 to 930MHz Transceiver Evaluation Board Description |
| EVB7122-868-FSK-A | 制造商:MELEXIS 制造商全称:Melexis Microelectronic Systems 功能描述:27 to 930MHz Transceiver Evaluation Board Description |
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