参数资料
型号: ST92163N4G0V
厂商: 意法半导体
英文描述: 8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT
中文描述: 16位产品全速USB微控制器16端点,20,000光盘和2K的RAM,I2C和脊髓损伤的复合设备,
文件页数: 29/224页
文件大小: 1372K
代理商: ST92163N4G0V
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ST92163 - 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 4). 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 thata lower case“
r
” isused to denote thisin-
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 1.3.3,
and illustrated in Figure 5 and in Figure 6.
System Registers
The 16 registers in Group E (R224 to R239) are
System registersand may be addressed using any
of the register addressing modes. These registers
are described in greater detail in Section 1.3.
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 PagePointer, R234, is set to 5, the
instructions:
spp #5
ld R242, r4
will loadthe 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 reg-
isters 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 8. 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
相关PDF资料
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ST92163R4G0V 8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT
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相关代理商/技术参数
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