Dap Interface; Fig. 4-5 Equivalent Circuitry Of The Ecu Dap Interface (Ecu) - ETAS FETK-S1.1 User Manual

ETAS
4.4

DAP Interface

ECU
Fig. 4-5
The FETK-S1.1 Device Access Port (DAP) interface is configurable and oper-
ates in the 2-pin or in the 3-pin mode (wide mode).
Supported DAP modes:
• 2-pin DAP mode: one data pin (direction via protocol), one clock pin
• 3-pin DAP mode: two data pins (bidirectional, direction via protocol), one
clock pin
The 2-pin DAP mode is the FETK-S1.1 DAP interface default mode.
FETK-S1.1 - User's Guide
Ubatt1: Permanent power supply
(ECU internal or external )
Ubatt2: If permanent power supply is external ,
connect to an additional ECU internal
voltage
supply and monitor
the voltage of the ED RAM
optional
If there is a resistor connected to pin /TRST
it should be a pulldown >= 100 kOhm
TMS
/TRST
TCK
TDO
TDI
Aurix
VDD
/PORST
ESR0
/WGDIS circuit
Equivalent Circuitry of the ECU DAP Interface (ECU)
ETAM8
Ubatt1 6
Ubatt2
CAL WAKEUP (12 V)
GND
VDDSTBY (1.3 V)
VDDPSTBY (3.3 V) 1
2
DAP0 GND
DAP2 /TRST
TDI TMS
/WGDIS
VDD (Sense )
10 9
/RESETOUT
/PORST
(ESR 0)
Hardware Description
FETK
ETAM2
22