Hardware Reference - Stollmann
Hardware Reference - Stollmann
Hardware Reference - Stollmann
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BlueMod+B20/AI<br />
BlueMod+B20/AP<br />
BlueMod+B20/AP/L<br />
3.4 PIO Interface<br />
It is possible to use the programmable digital I/Os PIO[0:11] and the programmable<br />
analog I/Os AIO[0:1] on the BlueMod+B20. Their behavior has to be defined project<br />
specific in the firmware.<br />
3.5 I 2 C Interface<br />
PIO[8:6] can be used to form a master I 2 C interface. The interface is formed using<br />
software to drive these lines. Therefore, it is suited only to relatively slow functions<br />
i.e. EEPROM.<br />
+1.8V<br />
10nF<br />
PIO[8]<br />
PIO[6]<br />
PIO[7]<br />
VCC<br />
WP<br />
SCL<br />
SDA<br />
A0<br />
A1<br />
A2<br />
GND<br />
Example EEPROM connection<br />
The BlueMod+B20/AI, BlueMod+B20/AP/L and BlueMod+B20/AP interface directly<br />
to EEPROM devices including the following:<br />
Atmel AT24Cxxx<br />
Catalyst CAT24WCxxx<br />
Fairchild FM24Cxxx<br />
Microchip 24AAxxx<br />
Philips PCF8582C-2, PCF8594C-2, PCF8598C-2<br />
Seiko 24Cxx, 24CSxx<br />
Rohm BR24Cxx<br />
ST M24C32, M24C64, M24128-B, M24256-B,M24512<br />
3.6 Bluetooth radio Interface<br />
The BlueMod+B20/AI presents an integrated ceramic antenna.<br />
The BlueMod+B20/AP and BlueMod+B20/AP/L presents no integrated ceramic<br />
antenna whereas provides a 50 RF interface.<br />
Release r09 www.stollmann.de Page 14 of 55
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