HCS512-IP Microchip Technology, HCS512-IP Datasheet - Page 4

• Manufacturer Part Number: HCS512-IP
• Description: KEELOQ CODE HOPPING DECODER
• Manufacturer: Microchip Technology

HCS512
2.0
DS40151C-page 4
Note 1: P = power, I = in, O = out, and ST = Schmitt Trigger input.
PIN
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
2: Pin 12 and Pin 13 have a dual purpose. After reset, these pins are used to determine if programming mode
PIN ASSIGNMENT
is selected in which case they are the clock and data lines. In normal operation, they are the clock and data
lines of the synchronous data output stream.
OSC
Function
Decoder
LRNOUT
OSC
Ground
SLEEP
LRNIN
MCLR
DATA
IN
RFIN
Vlow
CLK
V
NC
NC
S0
S1
S2
S3
DD
(4 MHz)
OUT
I/O
I/O
I/O
—
—
—
O
O
O
O
O
O
P
P
I
I
I
I
I
(1)
TTL/ST
TTL/ST
Type
Buffer
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
ST
ST
—
—
—
—
(1)
(2)
(2)
Learn input - initiates learning, 10K pull-up required on input
Oscillator in – recommended values 10 k and 10pF
Clock in programming mode and synchronous mode
Data in programming mode and synchronous mode
Connect to RFIN to allow wake-up from sleep
Learn output - indicates learning
Oscillator out – no connection
Battery low indication output
RF input from receiver
Ground connection
Master clear input
Power connection
Do not connect
Description
Switch 0
Switch 1
Switch 2
Switch 3
1997 Microchip Technology Inc.