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MC81F4332G Datasheet(PDF) 55 Page - Finechips

Part # MC81F4332G
Description  ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
Download  198 Pages
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Manufacturer  FINECHIPS [Finechips]
Direct Link  http://www.finechips.com
Logo FINECHIPS - Finechips

MC81F4332G Datasheet(HTML) 55 Page - Finechips

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MC81F4432
October 19, 2009 Ver.1.35
55
9.3 Data Memory
0300H
0000H
00AFH
0400H
Page 0
0300H
0200H
00FFH
User Memory
(176Bytes)
Control Register
(80Bytes)
00B0H
0100H
User Memory
or Stack Area
(256Bytes)
01FFH
User Memory
(256Bytes)
02FFH
User Memory
(256Bytes)
03FFH
User Memory
(80Bytes)
044FH
(When “G-flag = 0”,
this page 0 is selected
Page 1
Page 2
Page 3
Page 4
Figure 9-8 shows the internal Data Memory space available. Data Memory is divided into three groups,
a user RAM, Stack memory and Control registers.
9.4 User Memory
The MC81F4x32 has a 512 bytes user memory (RAM). RAM pages are selected by the RPR register.
RPR
RAM PAGE SELECT REGISTER
00E1H
7
6
5
4
3
2
1
0
RPR
-
RPR bits
Reset value:
----_--00b
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RPR bits
Ram Page Select bits
000: page 0
011: page 3
001: page 1
100: page 4
010: page 2
Note :
After setting RPR(RAM Page Select Register), be sure to execute SETG instruction.
Whenever CLRG instruction is excuted, PAGE0 is selected regardless of RPR.
Figure 9-8 Data Memory Map


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