CybraTech (2000) Ltd.
SOC-4000/i Scale-On-Chip
ASIC
Technical Specification
Revision B
Page 2
August, 2002
General Description
The SOC-4000 ASIC is an 84-pin, single-chip scale intended to replace present-day,
multiple-component weighing printer scale electronic circuitry designs. It includes the
pre-amplifier, A/D converter, display drivers, keyboard controller, printer drivers, serial
communication, embedded CPU and field-programmable program and data memory.
As a "stand-alone" unit it incorporates all scale hardware functions and represents a true
breakthrough in scale manufacturing. It eliminates the risks, costs and inventory needs
associated with discrete components.
The SOC-4000 comes with a comprehensive software library, which implements
hardware drivers, such as the display, keyboard and printer, as well as most of the
standard weighing functions. A complete development environment is available,
enabling the user to tailor and customize the application according to specific needs.
The general SOC-4000 block diagram is presented in Figure 2.
Advantages
•
Generic OIML R-76 approval
•
Minimize hardware and software development
•
Significantly cuts time-to-market
•
Reduces inventory needs
PGA
MUX
Delta - Sigma
ADC
20 Bits
MicroController Core And
Peripherals
80C51TBO
512K x 8 Program / Data Flash
512K x 8 RAM
Watchdog Timer
3 x 16-Bit Timers
Power Supply Monitor
I2C Compatible
SPI Like Serial Interfaces
UART
Serial Display Controllers
LCD / LED / VFD
20 - 24 Digits
Keyboard Controller
8 x 16
Internal
Bandgap
Reference
Power-Down
Detector
Frequency Controller
8
Serial Communication (2)
(RS-232 / RS-485)
I/O
Keyboard
Load
Cell
Aux.
Channel
Oscillator/
Resonator
Ref+
Ref-
VDET
Printer
Controller
Printer Head
Printer
Motor
Printer
Sensors
Displays
FIGURE 2:SOC-4000 MAXIMAL BLOCK DIAGRAM
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