MC6800S Просмотр технического описания (PDF) - Motorola => Freescale

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производитель

MC6800S

8-BIT MICROPROCESSING UNIT (MPU)

Motorola => Freescale 

I

FIGURE 18 – PROGRAM FLOW FOR BSR

SP~m–2

m—1

a(n +2)H

m

m+l

n

“+1 ]

tK = Offset*

I

n+l

n+ 2 I Next Main l“str.

I

n+2

* K = Signed 7-Bit value

(a) Before Execution

-.

,~i)::~’

\ ,\~.,,

FIGURE 19 – PROGRAM FLOW FOR JSR (~TENDEm,\ ‘%,

FIGURE 20 – PROGRAM FLOW FOR JSR (lNDWED)

r

“1

JS R

I

n+ 2 I SL=Sub,.

Addr,

I

r

(a) Before Ex%utton

““s=

(S formed from

SH and SL)

1

(b) After Execution

m—l

sP—m

m+l

7E

7A

B

m—1

m

m+l

—

(n+2)H

(n+2)L

7E

7A

PC_n

JSR=AD

n+l

K = Of fset”

“+2

Next Main l“str.

a

qK = 8-Bit U“sig”ed Value

PC+

“

“+1

“+2

JSR = AD

K = Offset

Next Main l“str.

g

X.+K

1st S.br, Instr.

1

(a) Before Execution

1

“Contents of Index Register

(b) Afrer Execuxion

MOTOROLA

Semiconductor Products Inc.

18

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