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KEY
CONCEPTS
_
Peripheral
Sub8
Y
8tem_l_
Peripheral
Subsystem
Interface
--lI-1
0+-
432
<
Port
Object>
(1)
System
-.
Action
Data
Location
Input
---
......
~.
I
~.~-----output
I
Message
0 0
~
____
J~--"··~_B_u_~_~_e_r_~··IIf-----1·"O""4:l------I"·1(M~~~:~!)I""-----I··O
_____
C_o_p.Y
__
D_a_ta
____
1
....
1
___
C_O_p_Y_D_a_t_a
__
....
11
Copy
Re
f
erence
II
Copy
Re
fer
ence
I
&.S.I/0
spac~
(P.S.
Memory
I
~1
______________
4_3_2_S~y_s_t_em_._M_e_rn_D_r_Y
____________
.J
~~~~~!in9
Device
Task
I
~1
___________
I_p
__
C_o_n_t_ro_l_le_r
______________
~1
~1
____
G_D_p
__
p_r_o_c_e_s_s
___
~
::::;n9
'DeViCe
Controller/
(2)
I I
AP
+
IP
(3)
I
...
I
____
GD_P
____
--'
Notes:
(1)
Only
object
reference
is
moved
to
and from
port.
(2)
Supporting
processor
is
defined
by
application;
may
be AP, a
separate
processor,
may
include
a
DMA
controller.
(3)
May
also
include
a
DMA
controller.
Figure
1-6
I/O
Data
FICM
Surnnary
1-15