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For our purposes, the CPL bit is set and so we will use SPH/SP for direct addressing. SP is initialized for you in the core file and should not need to be modified. SP-referenced direct addressing is used by the psh and pop instructions for stack manipulation, as well as by all subroutine calls and returns, which save program addresses on the stack.


; Assuming SPH = 0, SP = FF00h, MOV *SP(5) , T2 ; T2 = value at location 00FF05h ; Assuming DPH = 3, DP = 0 MOV @0005h, T2 ; T2 = value at location 030005h ADD *SP(6), AC0 ; AC0 = AC0 + (contents of memory location SPH:SP+6)

Absolute addressing: *abs16(#k16), *(#k23)

This seems to be TI's term for all the forms of direct addressing which it does not call direct addressing! There are three types of adsolute addressing : k16, k23, and I/O. We will only be using the first two. It isrepresented in assembly-instruction syntax-definitions using one of the above abbreviations ( *(lk) addressing is available when the syntax definition says Smem or Lmem ).


k16 absolute addressing uses the operand *abs16(#k16) along with the 7-bit DPH to form a 23-bit address.


; Assuming DPH = 3 MOV *abs16(#2002h), T2 ; T2 = value at address 032002h


k23 absolute addressing uses the operand *(#k23) as a 23-bit address.


MOV *(#032002h), T2 ; T2 = value at location 032002h MOV AR1, *(#hold) ; sets (storage location at hold) = AR1

Indirect addressing: smem, lmem, xmem, ymem, cmem

Indirect addressing on the TMS320C55x uses the auxiliary registers AR0 through AR7 and the CDP . They can be used in place of Smem/Lmem or Xmem/Ymem .

Ar indirect: smem/lmem

In Smem/Lmem indirect addressing, only one indirect address is used int he instruction and a number of variations is possible (see the table on page 6-39 of the CPU Reference guide). An asterisk is always used, which usually signifies indirect addressing. Any of the registers AR0 - AR7 may be used, with optional modifications: automatic post-decrement by one, pre- and post-increment by one, post-increment and post-decrement by n ( n being stored in T0, T1, or AR0), and more, including many options for circular addressing (which automatically implements circular buffers) and bit-revered addressing (which is useful for FFTs).

Dual ar indirect: xmem/ymem

Xmem/Ymem indirect addressing is generally used in instructions that need two different indirect addresses,although there are a few instances where an Xmem by itself is specified in order to save bits in the opcode for other options. In Xmem/Ymem indirect addressing, fewer bits are used to encode the option modifiers in the opcode; hence,fewer options are available: post-increment by one, post-decrement by one, and post-increment by AR0 , T0 , or T1 with circular addressing.

ADD Xmem, Ymem, ACx ADD *AR1+, *AR2+, AC0 ; Add values stored in memory locations referenced by ; AR1 and AR2 and store result in AC0. ; Incremement AR1 and AR2 by 1 with or without circular ; addressing depending on circular addressing bit ; for the respective auxiliary registers

Questions & Answers

do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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