Tait TB9100 Service Manual

38 Network Circuitry TB9100 Reciter Service Manual
© Tait Electronics Limited January 2006
5.2 Risc Processor
5.2.1 Risc Processor
The main processor, U201, is a PowerQUICC MPC859TPZ133, hereafter
abbreviated to MPC. This device consists of a PowerPC derived RISC
processor in conjunction with a micro-coded RISC based Communications
Processor Module (CPM). The RISC processor runs the main application
program(s) under Linux while the CPM offloads the lower level processing
of various serial communications protocols.
The MPC859T is a subset member of the MPC866 PowerQUICC
communications processor family and has fewer communications interfaces
compared to the full function MPC866 device ie. it provides only one serial
communications controller (SCC), instead of the four fitted to the
MPC866.
The block diagram (Figure 5.2) shows the internal structure; refer to the
MPC866 data sheet (reference 1) and MPC866 user’s manual (reference 2)
for full details of the internal functions.
Figure 5.2 MPC859T Block Diagram
Embedded
MPC8xx
Processor
Core
Instruction
Bus
Load/Store
Bus
4-Kbyte
Instruction Cache
Instruction MMU
32-Entry ITLB
4-Kbyte
Data Cache
Data MMU
32-Entry DTLB
Fast Ethernet
Controller
DMAs
FIFOs
10/100
Base-T
Media Access
Control
Ethernet
MII
Parallel I/O
4
Timers
Interrupt
Controllers
8-Kybte
Dual-Port RAM
4 Baud
Generators
Parallel Interface
Port and UTOPIA
Timers
10
Serial
and
2
Independent
DMA
Channels
32-Bit RISC Controller
and Program
ROM
Time Slot Assigner
Serial Interface
SCC1 SMC1 SMC2 SP1 I
2
C
POWERPC CORE
CPM
External
Buses
System Interface Unit (SIU)
Memory Controller
Internal
Bus Interface
Unit
External
Bus Interface
Unit
System Functions
PCMCIA-ATA Interface
Unified
Bus

Tait TB9100 Specifications

General

Brand	Tait
Model	TB9100
Category	Accessories
Language	English