HCS473T/SL Microchip Technology, HCS473T/SL Datasheet - Page 14

• Manufacturer Part Number: HCS473T/SL
• Description: IC KEELOQ 3AXIS TRANSCODR 14SOIC
• Manufacturer: Microchip Technology
• Series: KEELOQ®r
• Type: Code Hopping Encoder and Transponderr

Specifications of HCS473T/SL

• Applications: Access Control Systems
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

HCS473
FIGURE 3-1:
FIGURE 3-2:
DS40035C-page 12
Hopping Code:
Hopping Code:
Seed Code:
MSb
MSb
Q1 Q0 C1 C0
Q1 Q0
2 Bits
2 Bits
QUE
QUE
Shaded 65 bits included in CRC calculation
Fixed Code Portion (9 Bits)
MSb
C1 C0
C1 C0
2 Bits
2 Bits
2 Bits
CRC
CRC
CRC
V
V
V
1-Bit
1-Bit
1-Bit
Preamble
28-bit Serial Number (XSER = 0)
16-bit Synchronization Counter (CNTSEL=0)
Button Queuing enabled (QUEN=1)
LOW
32-bit Serial Number (XSER = 1)
20-bit Synchronization Counter (CNTSEL=1)
Button Queuing disabled (QUEN=0)
LOW
Queuing enabled (QUE = 1)
LOW
Fixed Code Portion (37 Bits)
Fixed Code Portion (35 Bits)
S2 S1 S0 S3
1
GENERAL CODE WORD FORMAT
CODE WORD ORGANIZATION
1
4 Bits
4 Bits
BUT
BUT
Most Sig 16 Bits
1
SER 1
1
12 MSb’s
12 Most Sig Bits
SER 1
Header
SDVAL3
Least Sig 16 Bits
Least Sig16 Bits
Preliminary
SER 0
SER 0
S2
Seed Value (60 Bits)
SDVAL2
16 Bits
S1 S0 S3
S2
S2
Data Bits
S1 S0 S3
S1 S0 S3
4 Bits
4 Bits
BUT
BUT
Hopping Code Portion Message (32 Bits)
Hopping Code Portion Message (32 Bits)
Overflow
Counter
DISCRIM
2 Bits
OVR1
8 Bits
SDVAL1
16 Bits
DISCRIM
10 Bits
OVR0
20
 2002 Microchip Technology Inc.
15
Synchronization
Synchronization
Transmitted LSb first.
Transmitted LSb first.
Transmitted LSb first.
Guard
Synchronization
Time
16 Least Sig Bits
Counter
Counter
20 Bits
69 Data bits
67 Data bits
69 Data bits
Counter
16 Bits
SDVAL0
LSb
LSb
LSb
0
0