Atmel AT89STK-09, User Manual

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Hardware
2-5 AT89STK-09 User Guide
7521B–SCR–10/05
• IO1, IO2, AUX1 and AUX2 are connected to the host smart card interface signals
depending on the configuration chosen. (Refer to the datasheet AT83C26)
2.3.1 CPRES0 & 1
External Pullups R1(component side), R2 (solder side) can be added if internal CPRES0, CPRES1 pull
up are not activated. R1, R2 recommended values are between 27KOhms to 1MOhms.
By default, resistors value is 180KOhms
Table 2-1. U1 Description
# Name Color #1 Name Color
1 CCLK Brown 11 AUX1 Brown
2 INT Red 12 Not Connected Red
3 CRST Orange 13 IO2 Orange
4 Not Connected Yellow 14 BY PASS Yellow
5 VSS Green 15 IO1 Green
6 CLK Blue 16 VSS Blue
7 VSS Velvet 17 SCL Velvet
8 Not Connected Grey 18 VCC Grey
9 AUX2 Blank 19 SDA Blank
10 RESET Black 20 EVCC Black