HCS500-IP Microchip Technology, HCS500-IP Datasheet - Page 22

• Manufacturer Part Number: HCS500-IP
• Description: KEELOQ CODE HOPPING ENCODER
• Manufacturer: Microchip Technology

HCS500
8.1.7
8.1.8
FIGURE 8-2:
DS40153B-page 22
Symbol
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
F
T
T
RESP
ACK 2
CLKH
CLKL
CMD
ERA
ACK
ACK
WT 2
ALW
PP 1
PP 2
PP 3
PP 4
CLK
DS
ERASE ALL COMMAND
PROGRAMMING COMMAND
Note:
Learn command activation time
Decoder acknowledge time
Microcontroller acknowledge
response time
Decoder data line low
Command request time
Decoder acknowledge time
Start command mode to first
command bit
Data line low before tri-stated
Clock high time
Clock low time
Clock frequency
Data hold time
Command validate time
Command acknowledge time
Acknowledge respond time
Data low after clock low
X
X
X
TYPICAL MICROCONTROLLER INTERFACE CIRCUIT
1
2
3
4
Because each HCS500 is individually matched to its EEPROM, in-circuit programming is
strongly recommended.
A0
A1
A2
V
U2
24LC02B
V
SS
Parameters
Parameters
CC
SDA 5
SCL 6
V
WP 7
CC
8
U3
POWER SUPPLY
SUPERVISOR 4.5V
VI
V
CC
G
N
D
VO
1K
1
2
3
4
Preliminary
Standard Operating Conditions (unless otherwise specified):
Commercial (C):
Industrial (I):
Standard Operating Conditions (unless otherwise specified):
Commercial (C):
Industrial (I):
V
EECLK
EEDAT
MCLR
U1
DD
HCS500
Min
Min
500
20
20
20
20
20
20
—
30
20
SCLK 6
—
—
—
—
—
—
SDAT 5
RFIN 7
V
SS
8
Receiver
RF
0 C TA
-40 C TA
0 C TA
-40 C TA
R3
10K
RST
Typ
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
+70 C
+70 C
+85 C
+85 C
1997 Microchip Technology Inc.
Microcontroller
25000
1000
1000
1000
1000
1000
1000
Max
Max
210
500
240
10
10
10
1
5
5
In-circuit
Programming
Probe Pads
Units
Units
ms
ms
ms
ms
Hz
s
s
s
s
s
s
s
s
s
s
s