Technical Introduction of SCIM Package
1 SCIM PACKAGE Configuration ◈ SCIM UNIT ◇ General Specifications Operating Voltage Range : 16V ~ 32V (nom 24V) Operating Temperature : -40℃ ~ 85℃ Storage Temperature : -40℃ ~ 100℃ LF Frequency : 125KHz RF Frequency : 433.92MHz(315MHz Only Japan) Dark Current Mode RFQ Proposal Operational, ref state ISS0 < 40㎃ < 30㎃ Standby State(LIN Sleep) < 4㎃ < 2.5㎃ Standby State(Security) < 3㎃ < 2㎃ Sleep State < 0.3㎃ < 0.3㎃ ◇ Package 1. Size : 175 x 145 x 45 mm 2.
1 SCIM PACKAGE Configuration ◈ SCIM UNIT ◇ Mounting Layout Sliding assembly structure will be applied with its external case hook (Separate Bracket will not be applied) Mounting Proposal : 1st slot in the EC(Electrical Center) In order to meet RKE(RF) Operation Distance with 40M, Seoyon proposes the minimization of interruption made by metal material at RF radiated field Necessary to have 53mm separation from SCIM conductor material (Ideal Distance is more than 86mm) Mountin
1 SCIM PACKAGE Configuration ◈ SCIM UNIT ◇ LF / RF BLOCK DIAGRAM RF SAW Filter 24,74 MHz Crystal RF front-end Transponder Antenna Driver Modules Transponder Powermanagement XTO Transponder interface Door Handles Watchdog SPI VDD = 5V ECU 4/9 VDD = 12V LF Chip Atmel ATA5291 RF receiver Atmel ATA5781 Event lines LF Antennas Event lines Amplifier SPI Ex Antenna LF
2 System Configuration ◈ Reaction Time Review ▶ LF Frequency : 125KHz ▶ RF Frequency : 433.92MHz ▶ LF Baud Rate : 3.91kbit/s ▶ RF Baud Rate : 9.6kbit/s ◇ FOB Searching Sequence – LF&RF sending and receiving Sequence ▶ RKE Baud Rate : 5kbit/s ▶ Encryption algorithm : AES128 Start Stop or Toggle Button RELAY output 10ms 20ms 1st SCIM (LF Send) 2nd 3rd 15ms 24ms REGISTER SEARCH (33ms) Common FOB (RF Receive) AUTHENTICATION SEARCH 1st 2nd 9.8ms 9.8ms 9.
2 System Configuration ◈ Reaction Time Review ◇ Issue on quantity of FOB 35ms (FOB 4EA) 35ms (FOB 8EA) - Proposal 55.63ms ( for Fob 4EA ) 1st / 5st , 2st / 6st.
3 System Configuration Search Areas Area II 2.5M Technical Requirements LF Antenna Coverage : Over 3 meters 2.5M Area I 2M 2M WAL FOB detected in Area I = Lock Standby FOB detected in Area II = Locking When the FOB is detected in Area I for more than 3 minutes in Lock Standby state, autodoor locking SAU FOB detected in Area II = Unlock Standby FOB detected in Area I = Unlocking WAL Lock Fail Warning Func.
4 System Configuration Security Issues (Relay Station Attack) Relay Attack Protection : Using Angle of Multiple LF Antenna VAnt2 VAnt1 Ø ANT1-2 ANT 1 8/9 ANT 2
5 System Configuration Security Issues (Relay Station Attack) • Magnitude of Vector 𝒂 = (𝒂𝒙 , 𝒂𝒚 , 𝒂𝒛 ) Standard Deviation of RSSI value(X, Y, Z) No RSA Case : Standard Deviation > Threshold value RSA Case : Standard Deviation < Threshold value < Threshold Value > • Angle between two vectors VAnt2 VAnt1 Ø ANT1-2 Angle Calculation ANT 1 ANT 2 No RSA Case : Ø ANT1-2 > Threshold Value RSA Case : Ø ANT1-2 < Threshold Value • Test Results : RSA 100% Protection 9/9
