hcs515 Microchip Technology Inc., hcs515 Datasheet - Page 10

• Manufacturer Part Number: hcs515
• Description: Keeloq Code Hopping Decoder Keeloq Code Hopping Decoder
• Manufacturer: Microchip Technology Inc.

HCS515
4.2.3
The command activation time (Table 4-1) is defined as
the maximum time the microcontroller has to wait for a
response from the decoder. The decoder will abort and
TABLE 4-1:
4.2.4
The command byte specifies the operation required by
the controlling microcontroller. Table 4-2 lists the com-
mands.
TABLE 4-2:
DS40183D-page 10
While receiving transmissions
During the validation of a received transmission
During the update of the sync counters
During learn
READ
WRITE
ACTIVATE_LRN
ERASE_ALL
PROGRAM
Instruction
COMMAND ACTIVATION TIMES
DECODER COMMANDS
Decoder State
COMMAND ACTIVATION TIMES
DECODER COMMANDS
Command Byte
D2
C3
F0
E1
B4
HEX
HEX
HEX
HEX
HEX
Min
—
—
—
—
service the command request. The response time
depends on the state of the decoder when the Com-
mand mode is requested.
Read a byte from user EEPROM
Write a byte to user EEPROM
Activate a learn sequence on the decoder
Activate an erase all function on the decoder
Program manufacturer’s code and configuration byte
2.5 ms BPWMAX = 2.7 ms
3 ms
40 ms
170 ms
Operation
2002 Microchip Technology Inc.
Max