Configuration
J1: Target reset configuration
Jumper J1 connects the Emulation Adapter reset line and the user target board reset line and is
populated by default. EA also features a Reset push button (SW1).
If having problems establishing the initial debug session with the Emulation Adapter, remove J1
and try again.
J2 and J3: Clock source configuration
Jumpers J2 and J3 select clock source for the emulation device.
Position 1-2 (default position) selects the crystal circuit oscillator on the user target board.Posi-
tion 2-3 selects an external clock source (Q1 socket on the Emulation Adapter).
The Emulation Adapter may not operate when your target board’s crystal circuit is
used as the clock source. Typical design guideline is that the crystal should be as
close as possible to the microcontroller. The crystal on your target board might not os-
cillate in conjunction with the Emulation Adapter when the clock lines (TP21_2,
TP21_3) between the crystal and the emulation device on the Emulation Adapter be-
come too long, thus affecting the impedance of the crystal circuit
.
Enclosed in the Emulation Adapter package is a separately packed 16 MHz crystal.
The crystal can be used as a 16MHz external clock (XOSC) source to the emulation
device. If a different clock frequency is required, insert appropriate crystal into the Q1
socket and replace C24 (default 10pF populated) and C25 (default 10pF populated)
accordingly. Crystal socket Q1 is per default not populated (NP).
Crystal socket Q1below:
