For minimum operation you have to install IC1, XTAL, C1, C2, C3, C11, C12
& R3. The XTAL can be exchanged to a resonator, then C2 and C3 can be omitted. When
using the RC Reset (C12 / R3), you also need to install jumper J6 (Rev.B board only)
or jumper pin 1 & 6 of IC3 (Rev.A board only) , so the reset signal reaches the
microcontroller. You can also add the PB1 pushbutton for a manual RESET if you do not have
that on any other place (like e.g. on the DT003/DT006).
If you need a bit better RESET (due to that you have other hardware
in the system like EEPROM etc. and you want to guarantee that the microcontroller doesn't
write to the EEPROM when voltage is too low, then you shall install the Brownout device Q1
and the resistor R6 (Rev.B board only).
If you need the best RESET performance with a delayed RESET of
200-300mS, you should not install C12 / R3 or Q1 / R6, instead just install the IC3
Then if you need ISP (In System Programmable) with a Kanda / Atmel
STK200 compatible programmer, you need to install J2 and if you like to have indication
when programming etc. also R2 and LD1.
If you want to use the ADC of the AT90S8535, then install R1 and C4
and optionally the J2 IDC connector. Jumper J1 is by default applying 5VDC to the AREF of
the ADC and if you need any other reference voltage, cut that wire open on the board and
install J1, so you can select a different reference voltage. pin 9 on the J1 connector
could then be used for applying the new voltage reference. There is also a very small
Prototype/Experiment area and one of the pads are connected to 0VDC (GND) and the other
To add on board RS-232, you need to install IC2, C5, C6, C7, C8, C9
and the J4 IDC connector. The J4 IDC connector is pin compatible with the SLI-OEM from Wirz, so adding a straight ribbon
cable between the SIMM100 and the SLI-OEM makes it simple and easy to use a serial LCD.
If you do not have access to 5VDC and would like to use e.g. 9-12VDC
then install the voltage regulator V1 and capacitor C10.
Finally the 2 user definable / general purpose LEDs (LD2 & LD3)
plus the resistors for them (R4 & R5) could be mounted and controlled via PC0 &
PC1 of the microcontroller, note that they sink current into the microcontroller, so
turning them on need a LOW output (0VDC) and turning them off needs a HIGH output (5VDC).
J5 is also a small 4 pin connector for the rest of the PD port
(PD4-7) that isn't routed out the the SimmStick bus.