The universal processor board with 80C552
CPU board has been based on the processor 80C552. Has the reserved place for:
80C552 PLCC processor
EPROM 27C256 - 32K low program page
Flash EPROM - AT29C020 or AT29C040 in more pages 32K in high 32K program page (enabled reprogram)
RAM 32K - 43256 32K low page external data, battery-powered back up
RAM 32K - 43256 32K high page external data, battery-powered back up
Serial Prom - 24C02.. 24C64
Memory decoder - two GAL16V8
Page latch - 74HC573
Port connector - P1, P3, P4, P5, PWM0, PWM1, Ext reset, Battery, P.G.
Bus connector - for the connecting peripheries on the parallel bus, 5 chip selects
Service port - Ext reset, TX, Rx, Gnd
Jumpers: WE_LOW_RAM, WE_HI_RAM, WATCHDOG, VREF,VREF+
Board enables the job in RAM and paged programmatical memory also is here sufficiently compatible with the modern Cross compilers. In the minimal configuration (CPU, EPROM, Ad.Latch) memory decoders can excange with a few jumpers.
Connecting of external battery and signals P.G. (power good\) possibly preserves contents of RAM at the disappearance of power supply. P.G. signal enables writings in RAM. If does not use, connects on the mass.
For A / D converter was able use the external referential voltage over port connector.
Dimensions: 111 * 85.5 * 16mm
The possible use:
Control of small machines
Chronometries, frequencies, period, voltage, other sizes after conversions
Control LED display with the store of data for the display (512Kb in Flash Eprom)
CPU board appropriate for DIN. 43700 housings (96 * 96mm or 48 * 96, L=124mm)
The expected price (included scheme and plan of elements):
Only the printed board (two-sided , guard, plan) 150 HRK (20 euro)
Full configuration with programed GAL - approximately 800 HRK (107 euro)
Configuration on order: - on the inquiry
Board on order with the program on order: - on the inquiry