Ordering Info and Specifications

The device numbering scheme for the EM1202 is as follows:

An illustration of the EM1202 numbering scheme.

512KB devices are no longer available.

If the flash memory size is omitted, the 1,024KB option is implied.

Examples of Valid Model Numbers

Model number



This is an obsolete device with only 512KB of flash memory


EM1202 module with 1,024KB of flash memory


EM1202 module with 1,024KB of flash memory

Hardware Specifications

Ethernet interface

10/100BaseT Ethernet, Auto-MDIX, magnetics not built-in

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

32 lines, all lines are 5V-tolerant;

24 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


Square wave generator

6Hz~22.1184MHz, primarily intended for driving external buzzer

Clock frequency

11.0592MHz with PLL off

88.4736MHz with PLL on

Flash memory

512KB or 1,024KB, entire memory minus 64KB is available to store 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.


2,048 bytes, 2,020 bytes available to store application data.

Typical write endurance is about 1,000,000 write cycles per 16-byte EEPROM sector. See Prolonging and Estimating EEPROM life.

Nominal power supply voltage (VCC pin)

DC 3.3V, ±5%

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 (VCC pin), not including hardware consumed by an add-on modules plugged into the EM1202

40mA with PLL off, Ethernet cable unplugged

50mA with PLL off, 10BaseT mode

110mA with PLL off, 100BaseT mode

160mA with PLL on, Ethernet cable unplugged

170mA with PLL on, 10BaseT mode

230mA with PLL on, 100BaseT mode

Operating temperature

–20°C to +70°C

Operating relative humidity

10% ~ 90%

Mechanical dimensions (excl. leads)


Pin diameter



Tray, 30 modules/tray

All specifications are subject to change without notice and are for reference only. Tibbo assumes no responsibility for any errors in this manual, and does not make any commitment to update the information contained herein.

Think the above table should contain additional data? Do not just assume that you know the answer — talk to Tibbo! Remember that the ultimate responsibility for all decisions you make regarding the use and the mode of use of Tibbo products lies with you, our customer.

Ordering Info and Specifications

Examples of Valid Model Numbers

Hardware Specifications