SMJ320C80 Datasheet, PDF (43/157 Pages) Texas Instruments – DIGITAL SIGNAL PROCESSOR

SMJ320C80
DIGITAL SIGNAL PROCESSOR
SGUS025B – AUGUST 1998 – REVISED JUNE 2002
PP parameter RAM
The parameter RAM is a 2K-byte, on-chip RAM which contains PP-interrupt vectors, PP-requested TC task
buffers, and a general-purpose area. The parameter RAM does not use the cache memory. Figure 35 shows
the parameter RAM address map.
Suspended PT Parameters
(128 Bytes)
0x0100#000–0x0100#07F
Reserved
(120 Bytes)
0x0100#080–0x0100#0F7
DEA / Cache Fault Address
PP Linked-List Start Address
Off-Chip to Off-Chip PT Buffer
(128 Bytes)
Interrupt Vectors
(128 Bytes)
General-Purpose RAM
(3572 Bytes Less Stack Size)
0x0100#0F8–0x0100#0FB
0x0100#0FC–0x0100#0FF
0x0100#100–0x0100#17F
0x0100#180–0x0100#1FF
0x0100#200
Application-Dependent Boundary
Stack
Stack State Information After Reset
(12 Bytes)
0x0100#FF7 Stack Pointer After Reset
0x0100#FF4–0x0100#FFF
# – PP Number
Figure 36. PP Parameter RAM Address Map
PP-interrupt vectors
The PP interrupts and their vector addresses are shown in Table 8.
NAME
TASK
PTQ
PTERR
PTEND
MPMSG
PP0MSG
PP1MSG
Table 8. PP-Interrupt Vectors
VECTOR
ADDRESS
0x0100#1B8
0x0100#1C4
0x0100#1C8
0x0100#1CC
0x0100#1D0
0x0100#1E0
0x0101#1E4
INTERRUPT
Task Interrupt
Packet Transfer Queued
Packet-Transfer Error
Packet Transfer End
MP Message
PP0 Message
PP1 Message
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