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3.9.3
Setting example
This is in case of using like following condition.
No.
Used as
(a)
Main
Routine
(b)
Character-
ROM
(c)
Sub
Routine
(d)
LCD
Display-RAM
(e)
Stack-
RAM
(a) Main routine (COMMON-Z)
Logical
Physical
Address
Address
C00000H
<-(Same)
C000xxH
<-
C000yyH
<-
・
From No.2 to No.8 instructions are setting of Ports and Memory controller.
・
No.9 is a setting for stack pointer. It is assigned to internal-RAM.
・
No.10 is a setting to execute for No.12's instruction.
・
No.12 is an instruction to call sub routine. When CPU outputs 400000H address, MMU will convert and output 000000H
physical address to external address bus: A23 to A0. And
in an area for CS1 at the same time. By these instructions, CPU cans brunch to sub-routine.
(Note: This example is based on sub routine program is already written on SRAM.)
Memory
Setting
NOR-Flash
CSZA
(16MB, 1pcs)
32bit,
1wait
SRAM
CS
(16MB, 1pcs)
16bit,
0wait
Internal-RAM
----
(288KB)
(32bit,
2-1-1-1clk)
No
Instruction
1
org
C00000H
2
ldw
(mamr2),80FFH
3
ldw
(b2csl), C222H
4
ldw
(mamr1),40FFH
5
ldw
(b1csl), 8111H
5.1
ldw
(localpz),8000H
5.2
ldw
(localrz),8000H
6
ld
(p8fc), 02H
7
ld
(p8fc2), 04H
9
ld
xsp,48000H
10
ldw
(localpy),8000H
11
:
12
call
400000H
13
:
14
:
15
:
92CZ26A-218
MMU-area
COMMON-Z
,
Bank0 in
LOCAL-Z
Bank0 in
,
1
LOCAL-Y
Bank1 in
LOCAL-Y
Bank2 in
LOCAL-Y
;
; CS2 800000-ffffff/8MB
; CS2 32bit ROM, 1wait
; CS1 400000-7fffff/4MB
; CS1 16bit RAM, 0wait
; Enable LOCAL-Z Bank for program
; Enable LOCAL-Z Bank for read-data
;
;
; Stack Pointer = 48000H
; Bank0 in LOCAL-Y is set as Program bank
for sub routine
;
; Call Sub routine
;
;
;
CS for SRAM will be asserted because of logical address is
1
TMP92CZ26A
Logical
Physical
address
address
C00000H to
FFFFFFH
800000H to
000000H to
BFFFFFH
3FFFFFH
400000H to
000000H to
5FFFFFH
1FFFFFH
200000H to
3FFFFFH
002000H to
049FFFH
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