Emerson PMPPC7448 Manuale Utente
Central Processing Unit:
Processor Reset
3-2
Figure 3-1:
MPC7448 Block Diagram
PROCESSOR RESET
Circuitry on the PmPPC7448 module resets the processor and the board. It activates the
RESET_OUT* signal on pin 60 of the P12 connector if the module voltages fall out of toler-
ance or if the optional on-board reset switch is activated. A COP SRESET causes a soft reset
to the processor, see the Reset Command register in Register Map 7-2.
RESET_OUT* signal on pin 60 of the P12 connector if the module voltages fall out of toler-
ance or if the optional on-board reset switch is activated. A COP SRESET causes a soft reset
to the processor, see the Reset Command register in Register Map 7-2.
PROCESSOR INITIALIZATION
Initially, the PmPPC7448 powers up with specific values stored in the CPU registers. The ini-
tial power-up state of the Hardware Implementation Dependent register (HID0) and the
Machine State register (MSR) are given in
tial power-up state of the Hardware Implementation Dependent register (HID0) and the
Machine State register (MSR) are given in
.
Table 3-2:
CPU Internal Register Initialization
Register:
Default After Initialization (Hex):
Notes:
HID0
8000,0000
(icache and dcache off)
8000,C000
(icache and dcache on)
MSR
0000,B032
Machine State register
(See Register Map 3-3)
(See Register Map 3-3)
Memory Subsystem
System Bus
Interface
1 MB L2
Cache
Controller
L1 Service
Queues
Floating
Point
Unit
Instruction MMU
Data MMU
Tags 32-KB
D Cache
Tags 32-KB
I Cache
Integer
Unit 2
Integer
Unit 1
(3)
Completion
Unit
Branch
Processing
Unit
Instruction
Queue
VR Issue
GPR Issue
FPR Issue
Instruction Unit
Load/Store Unit
Vector
Permute Unit
Vector Integer
Unit 2
Vector Integer
Unit 1
Vector FPU