Introduction
While occupying miniscule 19x17mm on your PCB, the EM1202 BASIC-programmable embedded module retains most features of the much larger EM1000 device. These include 100Base/T Ethernet, four serial ports, onboard flash, EEPROM, and 24 I/O lines that can be used to interface with external LCD, keypad, buzzer, and card readers.
Thanks to its miniature dimensions, the EM1202 can be conveniently used as a network front-end in automation, security, and data collection systems.
The EM1202 is fully supported by TIDE software and a dedicated EM1202 platform that covers all hardware facilities of the module (see "TIDE and Tibbo BASIC Manual"). For convenient testing and evaluation Tibbo offers EM1202EV evaluation board. The EM1202 can also support Wi-Fi communications (this requires GA1000 add-on board).
Hardware features
| • | Based on a high-performance purpose-built 88-MHz T1000 ASIC. |
| • | 10/100BaseT auto-MDIX Ethernet port (automatic detection of "straight" and "cross" cables). Standard Ethernet magnetics are NOT integrated into the module. |
| • | Optional Wi-Fi interface (requires GA1000 add-on module). |
| • | Four high-speed serial ports (CMOS-level): |
- Baudrates of up to 921,600bps;
- None/even/odd/mark/space parity modes;
- 7/8 bits/character modes;
- Full-duplex mode with optional flow control;
- Half-duplex mode with direction control;
- Encoding and decoding of Wiegand and clock/data streams.
| • | 512K or 1024KB flash memory for firmware, application, and data storage. |
| • | 2KB EEPROM for data storage. |
| • | Up to 32 general-purpose I/O lines. Among them: |
- 8 interrupt lines;
- Serial port lines;
- 24 lines that are combined into three 8-bit ports;
- Square wave output (6Hz - 22'1184MHz), which can be used to control external buzzer.
| • | Supports external LCD and keypad. |
| • | Four control lines for status LEDs: |
- 2 lines for green and red status LED control;
- 2 lines for Ethernet status LED control.
| • | Software- controlled onboard PLL to select the clock frequency of the device: 11.0592MHz with PLL off, 88.4736MHz with PLL on. |
| • | Reliable power-on/ brown-out reset circuit; no additional external reset circuitry required. Master reset input also provided. |
| • | Power: 230mA @ 3.3V (100BaseT mode, PLL on). |
| • | Dimensions: 17.1x19.1x14.6mm. |
| • | Firmware and Tibbo BASIC application are upgradeable through the serial port or network. |
| • | Tibbo BASIC application can be debugged through the network and no additional debugging hardware, such as in-circuit emulator, is required. |
Programming features
| • | Variable Types: Byte, char, integer (word), short, dword, long, real, string, plus ser-defined arrays and structures. |
| • | Function Groups: Strings functions (21 in total!), date/time conversion functions, and hash calculation functions (md5 and sha1). |
| • | Platform objects: |
- Sock — socket communications (up to 16 UDP, TCP, and HTTP sessions);
- Net — controls Ethernet port;
- Wln — handles Wi-Fi interface (requires GA1000 add-on module);
- Ser — in charge of serial ports (UART, Wiegand, and clock/data modes);
- Io — handles I/O lines, ports, and interrupts;
- Lcd — controls graphical display panels (several types supported);
- Kp — scans keypads of matrix and "binary" types;
- Fd — manages flash memory file system and direct sector access;
- Stor — provides access to the EEPROM;
- Romfile — facilitates access to resource files (fixed data);
- Pat — "plays" patterns on up to five LED pairs;
- Beep — generates buzzer patterns;
- Button — monitors MD line (setup button);
- Sys — in charge of general device functionality.