![background image](/i/lg/157962/lg-27lc2r/h/lg-27lc2r-090.png)
8
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»K-ÍÓ‰˚
■
—ÚÛÍÚÛ‡ ͇‰‡
1-È Í‡‰
œÓ‚ÚÓ Í‡‰‡
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¬Â‰Û˘ËÈ ÍÓ‰
■
œÓ‚ÚÓ ÍÓ‰‡
■
ŒÔËÒ‡ÌË ·ËÚ‡
■
»ÌÚ‚‡Î ͇‰‡: Tf
¬ÂÏÂÌ̇ˇ ‰Ë‡„‡Ïχ ̇˜Ë̇ÂÚ Ô‰‡‚‡Ú¸Òˇ ÔÓÒÎÂ
ÓÚÔÛÒ͇Ìˡ Í·‚˯Ë.
Low
custom code
Lead
code
High
custom code
Data code
Data code
C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
Repeat code
Tf
4.5 ms
9 ms
2.25 ms
9 ms
0.55 ms
0.56 ms
1.12 ms
Tf
Tf
Tf=108ms @455KHz
0.56 ms
2.24 ms
Bit ”0”
Bit ”1”
1.
œÓ‰Íβ˜ÂÌËÂ
■
œÓ‰Íβ˜ËÚ ÔÓ‚Ó‰ÌÓÈ ÔÛÎ¸Ú ‰ËÒڇ̈ËÓÌÌÓ„Ó ÛÔ‡‚ÎÂÌˡ Í ÔÓÚÛ ÔÛθڇ ̇ ÚÂ΂ËÁÓÂ.
2.
»K-ÍÓ‰˚ ÔÛθڇ ‰ËÒڇ̈ËÓÌÌÓ„Ó ÛÔ‡‚ÎÂÌˡ
■
¬˚ıӉ̇ˇ ‚ÂÏÂÌ̇ˇ ‰Ë‡„‡Ïχ
Œ‰ËÌÓ˜Ì˚È ËÏÔÛθÒ, ÏÓ‰ÛÎËÓ‚‡ÌÌ˚È Ò˄̇ÎÓÏ ˜‡ÒÚÓÚÓÈ 37,917 Í√ˆ ÔË 455 Í√ˆ
T1
Tc
ÕÂÒÛ˘‡ˇ ˜‡ÒÚÓÚ‡
FCAR = 1/TC = fosc/12
KÓ˝ÙÙˈËÂÌÚ Á‡ÔÓÎÌÂÌˡ =
T1/TC = 1/3
¬Â‰Û˘Ë
È ÍÓ‰
÷‰¯ËÈ ·‡ÈÚ ÍÓ‰‡
ÔÓθÁÓ‚‡ÚÂΡ
œÓ‚ÚÓ ÍÓ‰‡
—Ú‡¯ËÈ ·‡ÈÚ ÍÓ‰‡
ÔÓθÁÓ‚‡ÚÂΡ
KÓ‰ ‰‡ÌÌ˚ı
KÓ‰ ‰‡ÌÌ˚ı