140
Boards
© Tibbo Technology Inc.
Ethernet interface
10/100BaseT Ethernet, Auto-MDIX, with
RJ45/magnetics
Serial ports
4 ports, CMOS-level
UART capabilities
Baudrates up to 921'600bps;
none/even/odd/mark/space parity and 7/8
bits/character
Number of I/O lines
54 lines (including 5 on the
);
all lines are 5V-tolerant;
40 of I/O lines are combined into five 8-bit
ports;
8 lines can be used as interrupt lines.
Max. load current for each
I/O line
10mA
Square wave generator
6Hz - 22'1184MHz, primarily intended for driving
external buzzer
Real-time counter (RTC)
40 bit, increments at 128Hz
RTC backup power source ("-
S" version only)
Supercapacitor, supports RTC for approximately
6 days
Clock frequency
11.0592MHz with PLL off
88.4736MHz with PLL on
Flash memory
1024KBytes, the entire memory minus 64KB is
available for storing Tibbo BASIC/C application
and data.
Typical write endurance is 100'000 write cycles
per 256-byte sector. See the warning in
EEPROM memory
2048 bytes, 2020 bytes available for storing
application data.
Typical write endurance is around 1'000'000
write cycles per 16-byte EEPROM sector. See
Prolonging and Estimating EEPROM life
Switching regulator supply
voltage (supplied via the
power jack or VIN pin)
unregulated, 8-20V input range, 12V nominal
Direct system power
(supplied via the 3.3V pin
bypassing the switching
regulator)
regulated, 3.3V +/- 10%
Available current on the 3.3V
pin (when powering through
the voltage regulator)
1.0A if the WA2000 is used
1.3A if the WA2000 is not used
Reset circuit trip voltage
(3.3V system power line)
3.0V on power-up (i.e. when the voltage is
rising)
2.9V on brown-out (i.e. when the voltage is
dropping)
Operating current when the
3.3V is supplied directly
through the 3.3V pin
55mA with PLL off, Ethernet cable unplugged
70mA with PLL off, 10BaseT mode
130mA with PLL off, 100BaseT mode