參數(shù)資料
型號(hào): HCS412SN
廠商: Microchip Technology Inc.
英文描述: KEELOQ Code Hopping Encoder and Transponder
中文描述: 而Keeloq跳碼編碼器和轉(zhuǎn)發(fā)器
文件頁(yè)數(shù): 19/44頁(yè)
文件大?。?/td> 704K
代理商: HCS412SN
2002 Microchip Technology Inc.
Preliminary
DS41099C-page 19
HCS412
FIGURE 4-1:
FIELD ACKNOWLEDGE SEQUENCE
FIGURE 4-2:
LC PIN PULSE POSITION MODULATION (PPM)
3LF
TE
T
PU
3LF
TE
3LF
TE
2LF
TE
Command
T
ATO
Communication from reader to HCS412
Filed ACK Sequence from HCS412 to reader
8LF
TE
Inductive
Comms
(LC)
RF
Comms
(DATA)
8LF
TE
RF
Comms
(DATA)
Field Ack sequence repeats every 255 LF
TE
if no command is received.
255LF
TE
255LF
TE
(LC)
Comms
0
1
0
1
Start or
previous
bit
Transponder reader communication to the HCS412
HCS412 response back to the reader
2 LF
TE
2 LF
TE
4 LF
TE
2 LF
TE
2 LF
TE
LF
TE
LF
TE
LF
TE
Start or
previous
bit
Extending the high time
is acceptable but the low
time should minimally
be 1 LF
TE.
The HCS412 determines
bit values from rising edge
to rising edge times.
T
BITC
T
BITC
T
BITR
T
BITR
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