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| 型號： | 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 |
| 文件頁數(shù)： | 37/134頁 |
| 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
37
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251
1443
240xA legend for the internal hardware (continued)
Table 4. Legend for the 240xA DSP CPU Internal Hardware (Continued)
SYMBOL
NAME
DESCRIPTION
PREG
Product Register
32-bit register holds results of 16
×
16 multiply
0-, 1-, or 4-bit left shift, or 6-bit right shift of multiplier product. The left-shift options are used to manage the
additional sign bits resulting from the 2s-complement multiply. The right-shift option is used to scale down
the number to manage overflow of product accumulation in the CALU. PSCALE resides in the path from the
32-bit product shifter and from either the CALU or the data-write data bus (DWEB), and requires no cycle
overhead.
PSCALE
Product-Scaling
Shifter
STACK
Stack
STACK is a block of memory used for storing return addresses for subroutines and interrupt-service
routines, or for storing data. The C2xx stack is 16 bits wide and 8 levels deep.
TREG
Temporary
Register
16-bit register holds one of the operands for the multiply operations. TREG holds the dynamic shift count
for the LACT, ADDT, and SUBT instructions. TREG holds the dynamic bit position for the BITT instruction.
status and control registers
Two status registers, ST0 and ST1, contain the status of various conditions and modes. These registers can
be stored into data memory and loaded from data memory, thus allowing the status of the machine to be saved
and restored for subroutines.
The load status register (LST) instruction is used to write to ST0 and ST1. The store status register (SST)
instruction is used to read from ST0 and ST1 — except for the INTM bit, which is not affected by the LST
instruction. The individual bits of these registers can be set or cleared when using the SETC and CLRC
instructions. Figure 10 shows the organization of status registers ST0 and ST1, indicating all status bits
contained in each. Several bits in the status registers are reserved and are read as logic 1s. Table 5 lists status
register field definitions.
15
13
12
11
10
9
8
0
ST0
ARP
OV
OVM
1
INTM
DP
15
13
12
11
10
9
8
7
6
5
4
3
2
1
0
ST1
ARB
CNF
TC
SXM
C
1
1
1
1
XF
1
1
PM
Figure 10. Organization of Status Registers ST0 and ST1
Table 5. Status Register Field Definitions
FIELD
FUNCTION
ARB
Auxiliary register pointer buffer. When the ARP is loaded into ST0, the old ARP value is copied to the ARB except during an LST
instruction. When the ARB is loaded by way of an LST #1 instruction, the same value is also copied to the ARP.
ARP
Auxiliary register (AR) pointer. ARP selects the AR to be used in indirect addressing. When the ARP is loaded, the old ARP value
is copied to the ARB register. ARP can be modified by memory-reference instructions when using indirect addressing, and by the
LARP, MAR, and LST instructions. The ARP is also loaded with the same value as ARB when an LST #1 instruction is executed.
C
Carry bit. C is set to 1 if the result of an addition generates a carry, or reset to 0 if the result of a subtraction generates a borrow.
Otherwise, C is reset after an addition or set after a subtraction, except if the instruction is ADD or SUB with a 16-bit shift. In these
cases, ADD can only set and SUB can only reset the carry bit, but cannot affect it otherwise. The single-bit shift and rotate
instructions also affect C, as well as the SETC, CLRC, and LST #1 instructions. Branch instructions have been provided to branch
on the status of C. C is set to 1 on a reset.
CNF
On-chip RAM configuration control bit. If CNF is set to 0, the reconfigurable data dual-access RAM blocks are mapped to data
space; otherwise, they are mapped to program space. The CNF can be modified by the SETC CNF, CLRC CNF, and LST #1
instructions. RS sets the CNF to 0.
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| 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: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: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: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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