Board Layout; Clock Circuit; Reset Circuit - OLIMEX MOD-IO User Manual

BOARD LAYOUT

POWER SUPPLY CIRCUIT

CLOCK CIRCUIT

RESET CIRCUIT

Downloaded from Elcodis.com electronic components distributor
MOD-IO is typically power supplied with 8-30V DC.
Power consumption when all relays are working is about 310 mA.
Crystal Quartz 8 MHz connected to Atmega16l pin 7 (XTAL2) and pin 8 (XTAL1).
Crystal Quartz 32.768kHz connected to Atmega16L pin 25 ((TOSC1)PC6) and pin 26
((TOSC2)PC7).
MOD-IO reset circuit includes Reset scheme MCP130T (U2), AVRISP connector pin
5, JTAG connector pin 6, Atmega16L pin 4 (RESET), R9 (100Ohm), R10 (10k), C10
(100nF) and RST button.
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