Manualshelf

Service manual

ManualsBrandsComponent Solution Services ManualsComputer equipmentREC02F
41424344454647484950
Ultraview 1030/1050 Monitors — Service Manual
3-5
Theory
Main CPU
The Ultraview 1030/1050 uses a 25 MHz version of the Motorola MPC860 processor. The
following are some of the special 860 features:
• PowerPC core processor unit
• 4 KB instruction cache
• 4 KB data cache
• Memory management unit
• Watchdog and event timers
• Interrupt controller
• Programmable chip selects and a DRAM controller for memory and peripheral support
• Six high-speed dedicated serial peripheral ports
• 64 programmable I/O ports
Memory
Flash, DRAM, and SRAM memory are all on the local 860 bus. NVRAM is on the ISA bus.
Flash Memory — Two banks of flash memory are connected to programmable chip selects 0 and
1. Flash memory is used for code storage and is fast enough so that code can be directly executed
out of flash. This memory may be in-circuit programmed. The PCBA can hold 2 to 4 MB, with 4
being typical.
DRAM Memory — Two banks of DRAM are connected to chip selects 2 and 3. All DRAM is 3.3 V
EDO. From 4 to 8 MB of DRAM can be installed, with 8 being typical. The application program is
copied from flash to DRAM upon boot up and is executed from DRAM.
SRAM (GDS) Memory — 256 KB of DRAM are connected to chip select 6. This SRAM holds the
GDS data. It is held up through power interruptions by a super cap typically for 12 minutes.
NVRAM Memory — NVRAM is discussed in the ISA section.
MPC860-PCI Bridge
This is a Spacelabs Medical designed Field Programmable Gate Array (FPGA),
which implements a bus bridge between the MPC860 processor and the PCI bus.
The 860 accesses all PCI and ISA devices through this PCI bridge.
The main functions provided by the MPC860-PCI Bridge are:
• Enables the 860 processor to access Memory, I/O, and Configuration address spaces on the
PCI.
• Allows PCI peripherals to access DRAM and SRAM memory installed on the 860 processor
bus.
• Converts big endian to little endian and vice versa. The PCI bus is little endian; the 860 bus is
big endian.
• Performs PCI bus central arbiter function.
• Performs 860 processor bus arbitration.