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CC1110-RTY1 bảng dữ liệu(PDF) 35 Page - Texas Instruments

tên linh kiện CC1110-RTY1
Giải thích chi tiết về linh kiện  True System-on-Chip with Low Power RF Transceiver and 8051 MCU
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CC1110-RTY1 bảng dữ liệu(HTML) 35 Page - Texas Instruments

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CC1110
CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A
Page 35 of 202
The data pointer select bit, bit 0 in the Data
Pointer Select register DPS, chooses which
data pointer shall be the active one during
execution of an instruction that uses the data
pointer, e.g. in one of the above instructions.
The data pointers are two bytes wide
consisting of the following SFRs:
•
DPTR0 – DPH0:DPL0
•
DPTR1 – DPH1:DPL1
DPH0 (0x83) – Data Pointer 0 High Byte
Bit
Name
Reset
R/W
Description
7:0
DPH0[7:0]
0
R/W
Data pointer 0, high byte
DPL0 (0x82) – Data Pointer 0 Low Byte
Bit
Name
Reset
R/W
Description
7:0
DPL0[7:0]
0
R/W
Data pointer 0, low byte
DPH1 (0x85) – Data Pointer 1 High Byte
Bit
Name
Reset
R/W
Description
7:0
DPH1[7:0]
0
R/W
Data pointer 1, high byte
DPL1 (0x84) – Data Pointer 1 Low Byte
Bit
Name
Reset
R/W
Description
7:0
DPL1[7:0]
0
R/W
Data pointer 1, low byte
DPS (0x92) – Data Pointer Select
Bit
Name
Reset
R/W
Description
7:1
-
0x00
R0
Not used
0
DPS
0
R/W
Data pointer select. Selects active data pointer.
0 DPTR0
1 DPTR1
12.3.4 XDATA Memory Access
The
CC1110 provides an additional SFR register
MPAGE.
This
register
is
used
during
instructions MOVX A,@Ri and MOVX @Ri,A
MPAGE gives the 8 most significant address
bits, while the register Ri gives the 8 least
significant bits.
In some 8051 implementations, this type of
XDATA access is performed using P2 to give
the most significant address bits. Existing
software may therefore have to be adapted to
make use of MPAGE instead of P2.
MPAGE (0x93)– Memory Page Select
Bit
Name
Reset
R/W
Description
7:0
MPAGE[7:0]
0x00
R/W
Memory page, high-order bits of address in
MOVX
instruction



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