Technical Manual

GUARDIAN VHF 110W MOBILE 3-19
3.6.3.1.4 Transceiver EEPROM
The radio transceiver has an 8k x 8 serial EEPROM for storing transceiver calibration data. This data is set during
production testing for the specific transceiver. The data in this device is essentially constant and is never written to
by the main controller. At switch on, contents of the EEPROM are copied into the external RAM; EEPROM is not
accessed during normal operation.
3.6.3.2 Data Types
The controller software uses a number of different data types.
3.6.3.2.1 Volatile Variables
Variable data used by the H8 controller that is not retained when the radio is switched off, is stored in the H8
internal RAM and the external RAM.
3.6.3.2.2 Short Term Stored Variables
Variable data retained while the radio is switched off or the power is interrupted, is stored in the external RAM.
3.6.3.2.3 Permanent Stored Variables
Variable data retained indefinitely is stored in the parameter blocks of the Flash. Every time this data changes, a
parameter block must be erased, and the new data written into the now blank parameter block.
3.6.3.2.4 Radio Fill Data
The frequencies, modes, and power levels are associated with different channels programmed into the radio. This
data is programmed into the radio through the fill port.
3.6.4 Program/Fill/Control Interface
The controller provides a serial port for PC access to allow the following functions:
Function Description
Programming To update radio software
Filling For modifying the radio data store of modes and frequencies, etc.
Control For controlling the radio operating mode
3.6.4.1 Radio Programming
The controller software allows reprogramming of the Flash memory program blocks, on a block-by-block basis.
During these operations, the controller executes from the boot sector of the Flash and no radio or user interface
operations are possible. After a programming operation, cycle the power on the radio. Programming operations are
initiated on receipt of a specific serial message on the PC serial port.
3.6.4.2 Radio Fill
The controller provides the facilities to modify the system, group, bank, and radio global data through the PC serial
port. This interface provides the following facilities:
Facility Description
Radio erase Delete all fill data in the radio
Selective erase
Delete (mark as deleted) specific systems, groups, and banks (for
future use)
Radio fill Add specific systems, groups, banks, and global data to the radio store
Radio read Export the fill data contents of the radio store to the PC