Grass Valley 2000NET v4.0.0 - Manual (Page 70)

70 2000NET Instruction Manual
Functional Description
Processor (CPU)
The 2000NET processor runs at 50 MHz. All 2000NET software runs on this
processor.
Memory
The 2000NET has three different memory types, SDRAM, FLASH and non-
volatile.
The SDRAM consists of two 4 Mb x 16 ICs for a total of 16 MB configured
as 4 Mb x 32. During boot-up, the program code is loaded into SDRAM and
the program executes out of SDRAM after boot-up.
The flash RAM consists of two 2 Mb x 16 ICs for a total of 8 MB configured
as 2 Mb x 32. The program code is stored in flash and loaded into SDRAM
at bootup.
The non-volatile memory consists of a single 8kb x 8 IC for a total of 8 kilo-
Bytes. Various configuration information is stored in this memory.
Temperature Sensing
The module has two temperature sensors. One is located near the mother-
board side of the module and is used to measure frame temperature. The
other is near the front cover side of the module and is used to measure
ambient temperature. The processor reads these temperature sensors
through an I2C bus.
DIP switches
The 2000NET module has two DIP switches (S1 and S2) for status report
enabling/disabling. The DIP switches are read by the processor through
the Input Port.
General Purpose (GP) I/O
The general purpose inputs and outputs are through two relays (K3 and
K4) that can be open or closed through software control.
There are two general purpose inputs. Each has two pins, and a current
must be passed through them for the processor to read a logic high.