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HCS500 датащи(PDF) 16 Page - Microchip Technology

номер детали HCS500
подробное описание детали  KEELOQ짰 Code Hopping Decoder encoders to implement a unidirectional
PDF  40 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

HCS500 датащи(HTML) 16 Page - Microchip Technology

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HCS500
DS40153D-page 16
© 2011 Microchip Technology Inc.
5.2
Programming Waveform
The programming command consists of the following:
• Command Request Sequence (A to B)
• Command Byte (B to C)
• Configuration Byte (C to D)
• Manufacturer’s Code Eight Data Bytes (D to G)
• Activation and Acknowledge Sequence (G to H)
5.3
Programming Data String
A total of 80 bits are clocked into the decoder. The 8-bit
command byte is clocked in first, followed by the 8-bit
configuration byte and the 64-bit manufacturer’s code.
The data must be clocked in Least Significant Bit (LSB)
first. The decoder will then encrypt the manufacturer’s
code using the decoder’s unique 64-bit EEPROM crypt
key. After completion of the programming EEPROM,
the decoder will acknowledge by taking the data line
high (G to H). If the data line goes high within 30 ms
after the clock goes high, programming also fails.
FIGURE 5-1:
PROGRAMMING WAVEFORM
DECODER
MSB
MSB
A
Command Byte
Start Command
TCLKL
TCLKH
TPP1
TDS
BC
LSB
TPP3
TPP2
TCMD
D
LSB
LSB
Configuration Byte
CLK
μC DATA
MSB
TDATA
G
Most Significant Byte
H
TACK
TWT2
TAW
Acknowledge
MSB
E
Least Significant Byte
F
TDATA
TADDR
TPP4
DATA



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