HCS360 Datasheet, PDF (8/24 Pages) Microchip Technology – KEELOQ CODE HOPPING ENCODER

HCS360
3.5.4 DELM: DELAY MODE
If DELM = 1, delay transmission is enabled. A delayed
transmission is indicated by inverting the lower nibble of
the discrimination value. The delay mode is primarily for
compatibility with previous KEELOQ devices. If
DELM = 0, delay transmission is disabled (Table 3-4).
3.5.5 TIMO: TIME-OUT
If TIMO = 1, the time-out is enabled. Time-out can be
used to terminate accidental continuous transmissions.
When time-out occurs, the PWM output is set low and
the LED is turned off. Current consumption will be
higher than in standby mode since current will flow
through the activated input resistors. This state can be
exited only after all inputs are taken low. TIMO = 0, will
enable continuous transmission (Table 3-5).
TABLE 3-4
FAST1
0
0
1
1
TABLE 3-5
FAST 1
0
0
1
1
TYPICAL DELAY TIMES
FAST0
0
1
0
1
Number of Code
Words before Delay
Mode
28
56
28
56
Time Before Delay Mode
(MANCH = 0)
≈ 2.9s
≈ 3.1s
≈ 1.5s
≈ 1.7s
Time Ref Delay Mode
(MANCH = 1)
≈ 5.1s
≈ 6.4s
≈ 3.2s
≈ 4.5s
TYPICAL TIME-OUT TIMES
FAST 0
0
1
0
1
Maximum Number of
Code Words Transmitted
256
512
256
512
Time Before Time-out
(MANCH = 0)
≈ 26.5s
≈ 28.2s
≈ 14.1s
≈ 15.7s
Time Before Time-out
(MANCH = 1)
≈ 46.9
≈ 58.4
≈ 29.2
≈ 40.7
DS40152C-page 8
Preliminary
© 1996 Microchip Technology Inc.