參數(shù)資料
型號: RFHCS362F
廠商: Microchip Technology Inc.
英文描述: Code Hopping Encoder with UHF ASK/FSK Transmitter
中文描述: 跳碼編碼器的超高頻ASK / FSK發(fā)射器
文件頁數(shù): 11/60頁
文件大?。?/td> 502K
代理商: RFHCS362F
2002 Microchip Technology Inc.
Preliminary
DS41189A-page 11
rfHCS362G/362F
FIGURE 2-2:
I/O CIRCUITS
2.1
Encoder Architectural Overview
2.1.1
ONBOARD EEPROM
The rfHCS362G/362F has an onboard nonvolatile
EEPROM which is used to store user programmable
data. The data can be programmed at the time of pro-
duction and includes the security-related information
such as encoder keys, serial numbers, discrimination
and seed values. All the security related options
are read protected. The rfHCS362G/362F has built-in
protection against counter corruption. Before every
EEPROM write, the internal circuitry also ensures that
the high voltage required to write to the EEPROM is at
an acceptable level.
2.1.2
INTERNAL RC OSCILLATOR
The rfHCS362G/362F has an onboard RC oscillator
that controls all the logic output timing characteristics.
The oscillator frequency varies within ±10% of the
nominal value (once calibrated over a voltage range of
2V – 3.5V or 3.5V – 6.3V). All the timing values
specified in this document are subject to the oscillator
variation.
FIGURE 2-3:
TYPICAL rfHCS362G/362F
NORMALIZED OSCILLATOR
PERIOD VS. TEMPERATURE
S0, S1, S2,
Inputs
RS
V
DD
RFEN
S3 Input/
RFEN Output
RS
RDATA
DATA I/O
LED output
RL
RH
V
DD
DATA
LEDH
LEDL
PFET
NFET
PFET
NFET
NFET
SHIFT input
SHIFT
RFEN
IN
NFET
FSK
OUT
OUTPUT
ANT1, ANT2 outputs
CLKOUT
output
V
DDRF
PFET
NFET
PS/DATA
ASK
V
DDRF
V
P
LL
Lock
20
μ
A
V
DDRF
V
VCO
5 pF
200
200
Pump
LF
RFEN
IN
input
XTAL
PS
DATA
FSK
input
0.94
0.92
0.90
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
V
DD
Legend
= 2.0V
= 3.0V
= 6.0V
Temperature °C
-50-40-30
-20
-10 0 10 20 3040 50 6070 80 90
Note:
Values are for calibrated oscillator
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RFHCS362G Code Hopping Encoder with UHF ASK/FSK Transmitter
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