Parallel 8-bit or serial 4-pin SPI interface to MCU using 24 bytes
FIFO
Voltage range for communication to MCU between 1.8V and
5.5V
Can be powered by USB with no need for step conversion from
4.1V to 5.5V
Integrated supply voltage regulator (20mA), which can be used
to supply MCU and other external circuitry
Integrated supply voltage regulator for the RF output stage,
providing rejection to supply noise
Internal power amplifier (20dBm) for short range applications
AM & PM demodulation ensuring no “communication holes”
with automatic I/Q selection
Selectable reception gain, Reception automatic gain control
AD converter for measuring TX power using external RF power
detector
DA converter for controlling external power amplifier
On-board VCO and PLL covering complete RFID frequency
range 840MHz to 960MHz
3 Applications
The device is an ideal solution for UHF RFID reader systems and
hand-held UHF RFID readers.
Revision 1.1
1 - 53
lv
Programmable Dense Reader Mode filters on chip allowing a
true World Wide Shippable device
al
id
AS3992
Datasheet - A p p l i c a t i o n s
Figure 1. AS3992 Block Diagram
4xC
VDD_MIX
VDD_TXPAB
2xC
64 2
1
3
5
53 52
13 15
16 17
Supply Regulators &
References
OAD
OAD_2
ADC
DAC
31
30
58
hn
ic a
al m
co s
A
nt G
en
ts
til
54
59
63
61
34
AS3992
4
MIX_INP
MIXS_IN
7
9
MIX_INN
IQ Down-
Conversion
Mixer
DRM Filter
Gain Filter
Digitizer
Digitizer
10
27
28
20
21
32
33
RFOUTN
_1
RFOUTN
_2
RFOUTP
_1
RFOUTP
_2
MCU Interface
RF Out
Analog
Front-end
RSSI
Directional unit
RFONX
RFOPX
EXT_IN
56
36
37
60
OSCI
Oscillator
& Timing
System
EPC Gen 2 Protocol
Handling
GEN-2
Frame Gen
CRC
OSCO
VCO
CP
24 Byte
FIFO
62
6
8 11 12 14 22 23 24 25 26 29 35 55 57
65
VSS
VSS
VSN_MIX
CBIB
CBV5
VSN_1
VSN_2
VSN_3
VSN_4
VSN_5
VSN_D
VSN_RFP
VSN_A
VSN_CP
Te
c
www.austriamicrosystems.com/AS3992
Revision 1.1
EXP_PAD
lv
38
18
19
VDD_D
VDD_RF
VDD_B
AGD
VDD_A
VDDLF
VOSC
VDD_RFP
VDD_IO
IO0
IO1
IO2
IO3
IO4
IO5
IO6
IO7
51
41
42
43
44
45
46
47
48
50
39
40
49
CLK
EN
IRQ
CLSYS
al
7xC
Micro
controller
VDD_5LFI
COMN_A
COMN_B
COMP_A
COMP_B
VEXT
VEXT2
CD1
CD2
id
2 - 53
AS3992
Datasheet - C o n t e n t s
Contents
1 General Description ..................................................................................................................................................................
5 Absolute Maximum Ratings ......................................................................................................................................................
7.2 Host Communication ..........................................................................................................................................................................
7.3 VCO and PLL .....................................................................................................................................................................................
lv
7.1.1 Power Modes............................................................................................................................................................................. 12
13
13
7.4 Chip Status Control ............................................................................................................................................................................
Normal Mode .............................................................................................................................................................................
Direct Mode ...............................................................................................................................................................................
7.8.4 Fast AC Coupling.......................................................................................................................................................................
7.8.5 RX Gain .....................................................................................................................................................................................
7.8.6 Received Signal Strength Indicator (RSSI)................................................................................................................................
7.8.8 Normal Mode .............................................................................................................................................................................
7.8.9 Direct Mode ...............................................................................................................................................................................
7.8.10 Normal Mode With Mixer DC Level Output and Enable RX Output Available .........................................................................
7.9.1 DA Converter ............................................................................................................................................................................. 22
7.9.2 AD Converter ............................................................................................................................................................................. 22
8 Application Information ...........................................................................................................................................................
8.2 Main Configuration Registers .............................................................................................................................................................
8.3 Control Registers - Low Level Configuration Registers......................................................................................................................
8.4 Status Registers .................................................................................................................................................................................
8.5 Test Registers.....................................................................................................................................................................................
8.6 PLL, Modulator, DAC, and ADC Registers .........................................................................................................................................
8.8 FIFO Control Registers.......................................................................................................................................................................
8.9 Direct Commands...............................................................................................................................................................................
8.9.2 Hop to Main Frequency (84) ......................................................................................................................................................
8.9.3 Hop to Auxiliary Frequency (85) ................................................................................................................................................
8.9.4 Trigger AD Conversion (87).......................................................................................................................................................
8.9.9 Transmission With CRC (90) .....................................................................................................................................................
8.9.10 Transmission With CRC Expecting Header Bit (91) ................................................................................................................
8.9.11 Transmission Without CRC (92) ..............................................................................................................................................
8.9.12 Delayed Transmission With CRC (93).....................................................................................................................................
8.9.13 Delayed Transmission Without CRC (94)................................................................................................................................
8.11 Reader Communication Interface .....................................................................................................................................................
8.13 Serial Interface Communication .......................................................................................................................................................
控制器局部网CAN(Controller Area Network)属于现场总线的一种,是一种有效支持分布式控制或实时控制的串行通信网络,被公认为是最有前途的现场总线之一。 在工业控制系统中,电动执行器是电动单元组合仪表中一个很重要的执行单元。它由控制电路和执行机构两个在电路上完全独立的部分组成,可接收来自调节器的电控信号,将其线性地转换成机械转角或直线位移,用来操纵风门、挡板、阀门等...[详细]