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SIEMENS VDO Automotive AG SV C CE AIS LF
Functional Description /
User Manual
of the
SIEMENS VDO
Radio frequency remote control system
type
HMC TG
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SIEMENS VDO Automotive AG SV C CE AIS LF
FUNCTIONAL DESCRIPTION
1 System Components
The HMC TG System is a vehicle remote keyless entry (RKE) system. This system
consists of a Stand alone- type of receicer(SRx) with corresponding a RKE transmitter.
SRx has implemented on board with RF generic receiver device
The described system is a radio-frequency remote control for central doors locking /
unlocking, trunk release and Panic activity of an automotive vehicle. This system will be a
part of the equipment of the HMC TG vehicles.
The system is composed of the following ones:
- transmitter with 4 buttons (doors locking, door unlocking, and trunk release)
System Operation:
To serve a remote keyless entry system for the HMC TG RKE system. Remote keyless
entry function is provided by the RF system of the SRx and the RKE transmitter. The
operation of these functions are as follows:
RF KeyIdentifier
Start code
RF
emission
Host
BCM
Communication
Line
Remote keyless Entry:
The RKE transmitter transmits at 433.92 MHz for ECE ( or 315MHz for NA) an FSK
modulated data signal to the SRx. The RF system of SRx receives this encrypted RF
signal. The SRx send the signal to corresponding the host Body control module through
single wired K-line bus th en the host module broadcasts the requested remote commands
to the appropriate control modules in the vehicle through CAN –communication line . In
general the following functions are provided:
- Lock the car
- Unlock the car
- Unlock the trunk of the car
- Panic
SRx
receiver
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SIEMENS VDO Automotive AG SV C CE AIS LF
2 Variants:
Type designation Difference
5WY8212/8213 RKE transmitter 315/ 433.9MHz
5WY8222/8224 Stand alone type of receiver 315/ 433.9Mhz
5WY8230/8231 RKE generic KOR-recever device 315/ 433.9Mhz
3 Block diagram
3.1 Block diagram SRx receiver(5WY8222/8224):
RF generic Receiver
LNA
RF receiver
TDA522x
SMD
Vs
R
RF_DATA
RF_RSSI
RF_DISCHARGE
PDWN_SMD
MSEL
PDWN_KFSK/LNA
CONTACT_CLEANING
Microcontroller
uPD78xxx
PO1
P20
P22
P12
P11
P15
PO2
Vdd
RESET
P21
P13/TxD
P14/RxD
P120
P33
P32
P31
P30
Vs
RESET
VREF
TxD
RxD
WAKEUP
VARIANT_0
VARIANT_1
VARIANT_2
VARIANT_3
Batt
V
Single-Wired
Serial Link
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SIEMENS VDO Automotive AG SV C CE AIS LF
3.2 Block diagram RF generic KOR-receiver device (5WY8230/8231):
3.3 Block diagram RKE transmitter(5WY8212/8213):
2
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SIEMENS VDO Automotive AG SV C CE AIS LF
4 Technical Data transmitter
Carrier frequency: 315.00MHz± 150kHz / 433.9MHz ± 150kHz
Output power Europe: < 10mW
Modulation: FSK
Frequency Generation: PLL device
Number of channels: 1
Supply voltage: 3 V
Battery type: lithium, CR 2032
Range: < 6m
8. Typical usage pattern RKE transmitter
30 lock / unlock operations in 24 hours with a typical transmission duration of
270 milliseconds → 1.25 lock / unlock operations / hour
Transmitter ON 0.3375 seconds / hour
Transmitter OFF 3,599.6625 seconds / hour
Duty Cycle: TON / T
(ON+OFF)
x 100% = 0.3375 / 3,600 x 100 % = 0,009 %
9. Label Design transmitter
for ECE
Siemens VDO
5WY8213
10. Caution !
Any changes or modifications to the equipment not expressly approved by the party
responsible for compliance could void user’s authority to operate the equipment.
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