HCS515-I/P Microchip Technology, HCS515-I/P Datasheet - Page 15

• Manufacturer Part Number: HCS515-I/P
• Description: IC,Remote-Control Receiver/Decoder,CMOS,DIP,14PIN
• Manufacturer: Microchip Technology
• Type: Code Hopping Decoderr

Specifications of HCS515-I/P

• Applications: Remote Secure Access, Keyless Entry
• Mounting Type: Through Hole
• Package / Case: 14-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.0
The memory is divided between system memory that
stores the transmitter information (read protected) and
user memory (read/write). Commands to access the
user memory are described in Sections 4.2.5 and
The following information stored in system memory
needs to be programmed before the decoder can be
used:
• 64-bit manufacturer’s code
• Decoder configuration byte
4.2.6.
Note 1: These memory locations are read pro-
2002 Microchip Technology Inc.
2: The contents of the system memory is
DECODER PROGRAMMING
tected and can only be written to using
the program command with the device
powered up.
encrypted by a unique 64-bit key that
is stored in the HCS515. To initialize
the system memory, the HCS515’s
program command must be used.
5.1
The decoder is configured during initialization by set-
ting the appropriate bits in the configuration byte. The
following table list the options:
5.1.1
LRN_MODE
LRN_MODE = 0
mode is selected; with
(seed derived) mode is selected. See Section 6.0 for
more detail on learning modes.
5.1.2
The HCS515 can be configured to indicate repeated
transmissions. In a stand-alone configuration, repeated
transmissions must be disabled.
Bit
0
1
2
3
4
5
6
7
LRN_MODE
Mnemonic
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
REPEAT
Configuration Byte
LRN_MODE
REPEAT
selects between two learning modes. With
, the Normal (serial number derived)
Learning mode selection
Reserved
Repeat Transmission enable
Reserved
Reserved
Reserved
Reserved
Reserved
LRN_MODE = 1
LRN_MODE = 0
Learn
LRN_MODE = 1
Learn
0
1
= Disable
= Enabled
Description
HCS515
DS40183D-page 15
, the Secure
– Normal
– Secure