Ethernet interface

10/100BaseT Ethernet, Auto-MDIX, with RJ45/magnetics

Serial ports

Four 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 five on the wireless add-on connector);

all lines are 5V-tolerant;

40 of I/O lines are combined into five 8-bit ports;

eight 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 an external buzzer

Real-time counter (RTC)

40 bit, increments at 128Hz

RTC backup power source ("-S" version only)

Supercapacitor, supports RTC for approximately six days

Clock frequency

• 11.0592MHz with PLL off
• 88.4736MHz with PLL on

Flash memory

1,024KB, 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 Flash Memory and EEPROM.

EEPROM

2,048 bytes, 2,020 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, 8V~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)

• 1A if the WA2000 is used
• 1.3A if the WA2000 is not used

Reset circuit trip voltage (VCC pin)

• 3.0V on power-up (i.e., when the voltage on VCC is rising)
• 2.9V on brown-out (i.e., when the voltage on VCC 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
• 175mA with PLL on, Ethernet cable unplugged
• 190mA with PLL on, 10BaseT mode
• 250mA with PLL on, 100BaseT mode

Operating temperature

–20°C to +80°C

Operating relative humidity

10% ~ 90%

Mechanical dimensions (excluding RJ45 and power jack)

• EM1001: 75x36x17.5mm
• EM1001G: 75x36x19mm