st2064b Sitronix Technology Corporation, st2064b Datasheet - Page 7
st2064b
Manufacturer Part Number
st2064b
Description
8 Bit Microcontroller With 64k Bytes Rom
Manufacturer
Sitronix Technology Corporation
Datasheet
1.ST2064B.pdf
(57 pages)
- Current page: 7 of 57
- Download datasheet (895Kb)
8
8.1 Memory map
ST2064B builds in 64K bytes ROM and 2K bytes RAM. The internal ROM can be used as data memory or program memory. PRR is
the Program ROM Bank Register and DRR is the Data ROM Bank Register. The logical program ROM address is from $4000 to
$7FFF(16K bytes), and $8000 to $FFFF (32K bytes) is for logical data ROM address.
8.2 ROM
8.2.1 Bank Description
Setting corresponding value to register PRR (program memory) or DRR (data memory) when user wants uses different memory
bank.
Ver. 3.0
8
.
.
Address
M
M
PRR
DRR
E
E
.
M
M
O
O
Register
R
R
$31
$32
Y
Y
C
C
O
O
R/W
RW
RW
N
N
F
F
I
I
G
G
FIGURE 8-1 ROM Bank Selection Registers ($31~$32)
U
U
Bit7
R
R
-
-
A
A
T
T
I
I
O
O
Bit6
-
-
N
N
7/57
Bit5
-
-
Bit4
-
-
Bit3
-
-
Bit2
-
-
PRR1
Bit1
-
DRR0
ST2064B
PRR0
Bit0
5/8/09
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