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參數(shù)資料
| 型號： | ST90135M5 |
| 英文描述： | 8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM |
| 中文描述： | 64K ROM/ OTP / EPROM，2K的RAM的8位單片機系列 |
| 文件頁數(shù)： | 20/199頁 |
| 文件大?。?/td> | 2813K |
| 代理商： | ST90135M5 |
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ST90158 - DEVICE ARCHITECTURE
MEMORY SPACES
(Cont’d)
2.2.2 Register Addressing
Register File registers, including Group F paged
registers (but excluding Group D), may be ad-
dressed explicitly by means of a decimal, hexa-
decimal or binary address; thus
R231, RE7h
and
R11100111b
represent the same register (see
Figure 8
). Group D registers can only be ad-
dressed in Working Register mode.
Note that an upper case “
R
” is used to denote this
direct addressing mode.
Working Registers
Certain types of instruction require that registers
be specified in the form “
rx
”, where
x
is in the
range 0 to 15: these are known as Working Regis-
ters.
Note that a lower case “
r
” is used to denote this in-
direct addressing mode.
Two addressing schemes are available: a single
group of 16 working registers, or two separately
mapped groups, each consisting of 8 working reg-
isters. These groups may be mapped starting at
any 8 or 16 byte boundary in the register file by
means of dedicated pointer registers. This tech-
nique is described in more detail in Section 2.3.3
Register Pointing Techniques, and illustrated in
Figure 9
and in
Figure 10
.
System Registers
The 16 registers in Group E (R224 to R239) are
System registers and may be addressed using any
of the register addressing modes. These registers
are described in greater detail in Section 2.3 SYS-
TEM REGISTERS.
Paged Registers
Up to 64 pages, each containing 16 registers, may
be mapped to Group F. These are addressed us-
ing any register addressing mode, in conjunction
with the Page Pointer register, R234, which is one
of the System registers. This register selects the
page to be mapped to Group F and, once set,
does not need to be changed if two or more regis-
ters on the same page are to be addressed in suc-
cession.
Therefore if the Page Pointer, R234, is set to 5, the
instructions:
spp #5
ld R242, r4
will load the contents of working register r4 into the
third register of page 5 (R242).
These paged registers hold data and control infor-
mation relating to the on-chip peripherals, each
peripheral always being associated with the same
pages and registers to ensure code compatibility
between ST9 devices. The number of these regis-
ters therefore depends on the peripherals which
are present in the specific ST9 family device. In
other words, pages only exist if the relevant pe-
ripheral is present.
Table 3. Register File Organization
Hex.
Address
Decimal
Address
Function
Register
File Group
F0-FF
240-255
Paged
Registers
System
Registers
Group F
E0-EF
224-239
Group E
D0-DF
C0-CF
B0-BF
A0-AF
90-9F
80-8F
70-7F
60-6F
50-5F
40-4F
30-3F
20-2F
10-1F
00-0F
208-223
192-207
176-191
160-175
144-159
128-143
112-127
96-111
80-95
64-79
48-63
32-47
16-31
00-15
General
Purpose
Registers
Group D
Group C
Group B
Group A
Group 9
Group 8
Group 7
Group 6
Group 5
Group 4
Group 3
Group 2
Group 1
Group 0
9
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ST90135M5LVT6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8/16-BIT MICROCONTROLLER (MCU) WITH 16 TO 64K ROM. OTP OR EPROM. 512 TO 2K RAM - ST9 + FAMILY |
| ST90135M5Q6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM |
| ST90135M5T6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| ST90135M6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8/16-BIT MICROCONTROLLER (MCU) WITH 16 TO 64K ROM. OTP OR EPROM. 512 TO 2K RAM - ST9 + FAMILY |
| ST90135M6LVT6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8/16-BIT MICROCONTROLLER (MCU) WITH 16 TO 64K ROM. OTP OR EPROM. 512 TO 2K RAM - ST9 + FAMILY |
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