HCS515-ISM MICROCHIP [Microchip Technology], HCS515-ISM Datasheet - Page 13

• Manufacturer Part Number: HCS515-ISM
• Description: KEELOQ CODE HOPPING DECODER
• Manufacturer: MICROCHIP [Microchip Technology]

4.6
Reliable operation of the HCS515 requires that the
contents of the EEPROM memory be protected against
erroneous writes. To ensure that erroneous writes do
FIGURE 4-10: STAND-ALONE MODE LEARN/ERASE-ALL TIMING
FIGURE 4-11: TYPICAL STAND-ALONE APPLICATION CIRCUIT
1998 Microchip Technology Inc.
DATA
CLK
Power Supply Supervisor
Vcc
A
T
REQ
B
U3
Brown-out Circuit
VI
Learn Activation
G
N
D
VO
T
LRN
C
Vcc
Preliminary
R1
10K
Vcc
X
X
X
X
Q2
NPN
1
2
3
4
5
6
7
Erase-All Activation
NC
NC
V
S0
S1
MCLR
NC
not occur after supply voltage “brown-out” conditions,
the use of a proper power supply supervisor device is
imperative (Figure 4-11 and Figure 8-4).
DD
HCS515
T
RELAY SPST
K2
ERA
S_CLK
S_DAT
RF_IN
OUTPUT
V
NC
NC
NC
SS
14
13
12
11
10
9
8
X
X
X
RF Circuit
ANT1
D
R3
10K
Successful
HCS515
Vcc
T
LRN
10K
DS40183A-page 13
R2
10K
S1
LEARN
D1
LED
E