hcs365 Microchip Technology Inc., hcs365 Datasheet - Page 10

• Manufacturer Part Number: hcs365
• Description: Keeloq Code Hopping Encoder
• Manufacturer: Microchip Technology Inc.

HCS365
TABLE 3-3:
3.1
The HCS365 contains two transmitter configurations
with separate serial numbers, encoder keys, discrimi-
nation values, counters, and seed values. This means
that the HCS365 can be used as two independent
encoders. The code word is calculated using one of two
possible encoder configurations. Most options for code
word and modulation formats can be different from
Encoder 1 and Encoder 2. However, LED and RF
transmitter options have to be the same. The SHIFT
input pin is used to select between the encoder config-
urations. A low on the SHIFT pin will select Encoder 1
and a high will select Encoder 2.
DS41109D-page 10
WAKE
CNTSEL
VLOWL
VLOWSEL
PLLSEL
MTX
TSEL
DUAL
RFENO
Note 1: All Timing values vary ±10%.
Symbol
2: Voltage thresholds are ±150 mV.
Dual Encoder Operation
Address
3F: ---- --10
3D: ---- --10
3D: --54 ----
3F: ---- -2--
3F: ---- 3---
3F: ---4 ----
3F: --5- ----
3D: ----3---
3D:-----2--
DEVICE OPTIONS
16
:Bits
Wake-up
Counter Select
Low Voltage Latch Enable
Low Voltage Trip Point Select
PLL Interface Select
Minimum Code Words
Time-out Select
Dual Encoder Enable
RF Enable Output Select
(1)
(1)
Preliminary
Description
(2)
Disable = 0
Disable = 0
Disable = 0
16 bits = 0
2.2 V = 0
ASK = 0
Value
Value
Value
(1)
00
01
10
11
00
01
10
11
00
01
10
11
2
2
2
100 ms 16.7%
50 ms 33.3%
No Wake-up
75 ms 50%
Enable = 1
Enable = 1
20 bits = 1
Enable = 1
3.2V = 1
FSK = 1
Time(s)
Value
Value
2002 Microchip Technology Inc.
12.8
25.6
0.8
3.2
1
2
4
8
3.2.3.1
4.1
3.2.1
3.2.3.1
5.2
2.0
2.0
Reference
Section