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| 型號(hào)： | 5082-7623-BE200 |
| 英文描述： | 7.6 mm (0.3 inch)/10.9 mm (0.43 inch) Seven Segment Displays |
| 中文描述： | 7.6毫米（0.3英寸）/10.9毫米（0.43英寸），七段顯示器 |
| 文件頁(yè)數(shù)： | 38/134頁(yè) |
| 文件大?。?/td> | 1759K |
| 代理商： | 5082-7623-BE200 |
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TMS320LF2407A,TMS320LF2406A,TMS320LF2403A,TMS320LF2402A
TMS320LC2406A,TMS320LC2404A,TMS320LC2403A,TMS320LC2402A
DSP CONTROLLERS
SPRS145K
JULY 2000
REVISED AUGUST 2005
38
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251
1443
status and control registers (continued)
Table 5. Status Register Field Definitions (Continued)
FIELD
FUNCTION
DP
Data memory page pointer. The 9-bit DP register is concatenated with the 7 LSBs of an instruction word to form a direct memory
address of 16 bits. DP can be modified by the LST and LDP instructions.
INTM
Interrupt mode bit. When INTM is set to 0, all unmasked interrupts are enabled. When set to 1, all maskable interrupts are disabled.
INTM is set and reset by the SETC INTM and CLRC INTM instructions. RS also sets INTM. INTM has no effect on the unmaskable
RS and NMI interrupts. Note that INTM is unaffected by the LST instruction. This bit is set to 1 by reset. It is also set to 1 when
a maskable interrupt trap is taken.
OV
Overflow flag bit. As a latched overflow signal, OV is set to 1 when overflow occurs in the arithmetic logic unit (ALU). Once an
overflow occurs, the OV remains set until a reset, BCND/D on OV/NOV, or LST instruction clears OV.
OVM
Overflow mode bit. When OVM is set to 0, overflowed results overflow normally in the accumulator. When set to 1, the accumulator
is set to either its most positive or negative value upon encountering an overflow. The SETC and CLRC instructions set and reset
this bit, respectively. LST can also be used to modify the OVM.
PM
Product shift mode. If these two bits are 00, the multiplier’s 32-bit product is loaded into the ALU with no shift. If PM = 01, the PREG
output is left-shifted one place and loaded into the ALU, with the LSB zero-filled. If PM = 10, the PREG output is left-shifted by 4 bits
and loaded into the ALU, with the LSBs zero-filled. PM = 11 produces a right shift of 6 bits, sign-extended. Note that the PREG
contents remain unchanged. The shift takes place when transferring the contents of the PREG to the ALU. PM is loaded by the
SPM and LST #1 instructions. PM is cleared by RS.
SXM
Sign-extension mode bit. SXM = 1 produces sign extension on data as it is passed into the accumulator through the scaling shifter.
SXM = 0 suppresses sign extension. SXM does not affect the definitions of certain instructions; for example, the ADDS instruction
suppresses sign extension regardless of SXM. SXM is set by the SETC SXM instruction and reset by the CLRC SXM instruction
and can be loaded by the LST #1 instruction. SXM is set to 1 by reset.
TC
Test/control flag bit. TC is affected by the BIT, BITT, CMPR, LST #1, and NORM instructions. TC is set to a 1 if a bit tested by BIT
or BITT is a 1, if a compare condition tested by CMPR exists between AR (ARP) and AR0, if the exclusive-OR function of the 2 most
significant bits (MSBs) of the accumulator is true when tested by a NORM instruction. The conditional branch, call, and return
instructions can execute based on the condition of TC.
XF
XF pin status bit. XF indicates the state of the XF pin, a general-purpose output pin. XF is set by the SETC XF instruction and reset
by the CLRC XF instruction. XF is set to 1 by reset.
central processing unit
The TMS320x240xA central processing unit (CPU) contains a 16-bit scaling shifter, a 16 x 16-bit parallel
multiplier, a 32-bit central arithmetic logic unit (CALU), a 32-bit accumulator, and additional shifters at the
outputs of both the accumulator and the multiplier. This section describes the CPU components and their
functions. The functional block diagram shows the components of the CPU.
input scaling shifter
The TMS320x240xA provides a scaling shifter with a 16-bit input connected to the data bus and a 32-bit output
connected to the CALU. This shifter operates as part of the path of data coming from program or data space
to the CALU and requires no cycle overhead. It is used to align the 16-bit data coming from memory to the 32-bit
CALU. This is necessary for scaling arithmetic as well as aligning masks for logical operations.
The scaling shifter produces a left shift of 0 to 16 on the input data. The LSBs of the output are filled with zeros;
the MSBs can either be filled with zeros or sign-extended, depending upon the value of the SXM bit
(sign-extension mode) of status register ST1. The shift count is specified by a constant embedded in the
instruction word or by a value in TREG. The shift count in the instruction allows for specific scaling or alignment
operations specific to that point in the code. The TREG base shift allows the scaling factor to be adaptable to
the system’s performance.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TMP320LC2401APZS | DSP CONTROLLERS |
| 5082-7661-CG400 | 7.6 mm (0.3 inch)/10.9 mm (0.43 inch) Seven Segment Displays |
| 74ACT823LMQB | 9-Bit D Flip-Flop |
| 50E-2C-38.0 | TRANS PREBIASED PNP 200MW SOT23 |
| 500E-3CL-5.5 | E Rated Medium Voltage Fuses |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 5082-7626 | 功能描述:LED 顯示器和配件 Yellow Univ RDP RoHS:否 制造商:Avago Technologies 顯示器類(lèi)型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長(zhǎng):628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| 50827650 | 功能描述:LED 顯示器和配件 0.43in Hi Eff Red Ca 7Seg Display RoHS:否 制造商:Avago Technologies 顯示器類(lèi)型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長(zhǎng):628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| 5082-7650 | 功能描述:LED 顯示器和配件 Red CA LDP 7 Segment RoHS:否 制造商:Avago Technologies 顯示器類(lèi)型:7 Segment 數(shù)位數(shù)量:2 字符大小:7.8 mm x 14.22 mm 照明顏色:Red 波長(zhǎng):628 nm 共用管腳:Common Anode 工作電壓:2.05 V 工作電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 35 C 封裝:Tube |
| 5082-7650 | 制造商:Avago Technologies 功能描述:LED DISPLAY 0.43" HE RED |
| 5082-7650 | 制造商:Avago Technologies 功能描述:LED DISPLAY 0.43" HE RED |
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