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Note: the ZX-40 is being discontinued but can be ordered while inventory lasts. We recommend the ZX-40p as a replacement.
The ZX-40 is a powerful microcontroller for your home automation, industrial control, robotics
or other embedded systems application.
It is the 40-pin DIP cousin of the ZX-24 that provides 7 additional I/O pins, lower cost and more design flexibility
making it an excellent choice for serious hobbyists, experimenters and small system builders.
And, it's source code-compatible with the NetMedia BX-35 but with more capabilities and much higher speed.
The ZX-40 also features improved ATN circuitry that prevents your program from interfering with the downloading process.
Except for the improved ATN circuitry the ZX-40 is pin-compatible with the BX-35 DIP.
To use the ZX-40 you'll need a regulated voltage source (4.5 to 5.5VDC), a 14.7456MHz crystal, a serial EEPROM (e.g. 32K byte Atmel AT25256A),
and a few additional interface components.
You may download a schematic with suggested support circuitry for the ZX-40 as a PDF
or as an ExpressPCB .sch file.
To view the latter, you'll have to download free software from
ExpressPCB.
ZX-40 Technical Features
| Package |
40-pin DIP |
| Operating Temperature |
-40 to +85°C |
| Processor |
Atmel AVR ATmega32 |
| Power Requirements |
4.5 to 5.5VDC regulated at 200mA |
| Processor Speed |
Up to 14.7MIPS (14.7MHz) |
| Program Execution Speed |
Up to 185,000 instructions/secą |
| User RAM |
1536 bytes |
| Non-volatile Data Memory |
992 bytes |
| Program Memory |
Up to 64K bytes (16000+ instructions) |
| Digital I/O pins |
26+2˛ |
| Analog-to-Digital Channels |
Up to 8 channels, 10-bit resolution |
| PWM Channels |
Two 16 bit |
| I2C Support |
1 HW channel, 4 SW channels |
| 1-Wire Support |
Bit and byte level |
| SPI Support |
4 HW channels |
| Synchronous Serial I/O Support |
1-16 bits, MSB or LSB first |
| Asynchronous Serial I/O Ports |
1-HW, up to 4 SW full duplex |
| X-10 Command Support |
Yes |
| Multi-tasking Support |
Yes |
| External Interrupts |
3 |
| Analog Comparator Interrupt |
Yes |
| Interval Timer |
Yes |
| Exception Handling Support |
Yes |
| Floating Point Math |
Yes - IEEE 32-bit |
| Advanced Floating Point
Functions (sin, cos, log, etc.) |
System Level |
| Programming Interface |
Serial - 115.2K baud |
| Field Upgradeable System Software |
Yes |
Notes:
1) Speed based on the instruction b = b + 1.
2) The additional 2 I/O lines dedicated for serial I/O.
3) SW means implemented in system software, HW means hardware implementation.
Specifications subject to correction and change without notice.
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A standard serial port is required to download code to the ZX-40.
If your computer does not have a standard 9-pin serial port but does have a USB port, you may use a USB to serial adapter.
Note, however, that some USB to serial adapters are too slow to be useful with the ZX microcontrollers.
We have found that adapters based on the second generation FTDI chips seem to work well.
The ZBasic IDE, compiler and documentation may be obtained free of charge via the Download page. See the menu at the left.
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