ata5790 ATMEL Corporation, ata5790 Datasheet - Page 2

• Manufacturer Part Number: ata5790
• Description: Embedded Avr Microcontroller Including Complete Lf Functionality For Passive Entry / Passive Start Keys
• Manufacturer: ATMEL Corporation

1. Description
1.1
Figure 1-1.
2
System Block Diagram
Atmel ATA5790
*
ISP: In-System-Programmable
System Block Diagram
Flash Interface
*
*
32
33
34
35
36
37
38
*
31
1
*
30 20 28
2
Atmel
ded ultra-low-power AVR
LF immobilizer interface in a single QFN38 package.
Furthermore, the device has an integrated AES-128 cryptography hardware engine, which is
accessible via both the immobilizer and the PEPS unit. The immobilizer interface can run in con-
tactless mode, allowing energy supply and data transmission via the LF link.
The Atmel ATA5790 is designed for automotive applications that require both immobilization and
Passive Entry/Passive Start functions in one single key. It conforms to requirements of
extremely low power consumption and provides all the necessary circuitry for the entire
application.
3
RF-Transmitter:
RF-Transceiver:
T575x,
ATA5749C
ATA582x,
ATA5830
4
ATA5790
27 26 25 24
5
®
6
ATA5790 is a smart Passive Entry/Passive Start (PEPS) device that includes an embed-
7
C
Key
BUF
8
23 22 21 20
9 10 11 12
19
18
17
16
15
14
13
®
VBAT
8-bit microcontroller, a three-dimensional LF receiver module and an
LF-Coil
LF-Coil
LF/T-Coil
Z-axis
Y-axis
X-axis
Battery
Transponder
3D LF
RF
ATA572x, ATA5780
ATA582x, ATA5830
U2270B, ATA5272
RF-Transceiver:
RF-Receiver:
Base Station
ATA5279C
LF-Driver
Car
AVR
9197CS–RKE–07/11