參數(shù)資料
型號(hào)： 7643
英文描述： IrDA. protocol handler plus endec for DCE Apps, -40C to +85C, 18-SOIC 300mil, TUBE
中文描述： 7643Group數(shù)據(jù)表數(shù)據(jù)表1369K/JUL.30.03
文件頁數(shù)： 40/120頁
文件大?。?/td> 1369K
代理商： 7643
Rev.1.00 Jul 30, 2003 page 40 of 119
7643 Group
Fig. 33 Timing chart for burst transfer caused by hardware-related transfer request
A5
AD
L
1
85
PC + 2
AD
L
1, 00
PC + 1
PC
PC + 3
LDA $zz
STA $zz
(First cycle)
STA $zz
(Second cycle)
φ
OUT
SYNC
OUT
RD
WR
DMA
OUT
(Port P3
3
)
Address
Data
Transfer request
source (“L” active)
Transfer request source
sampling
Reset of transfer request
source sampling
DMA transfer
Data
DMA destina-
Dadd. 1
DMA destina-
Dadd. 2
DMA
data 1
DMA
data 1
DMA
data 2
DMA
data 2
AD
L
2
(2) Burst Transfer Mode
When the DMAC Channel x Transfer Mode Selection Bit (DxTMS)
is set to “1”, the respective DMAC channel operates in the burst
transfer mode.
In the burst transfer mode, the DMAC continually transfers the
number of bytes of data specified by the Transfer Count Register
for one transfer request. Other than this, the burst transfer mode
operation is the same as the cycle steal mode operation.
Priority
The DMAC places a higher priority on Channel-0 transfer requests
than on Channel-1 transfer requests.
If a Channel-0 transfer request occurs during a Channel-1 burst
transfer operation, the DMAC completes the next transfer source
and destination read/write operation first, and then starts the
Channel-0 transfer operation. As soon as the Channel-0 transfer is
completed, the DMAC resumes the Channel-1 transfer operation.
When an interrupt request occurs during any DMA operation, the
transfer operation is suspended and the interrupt process routine
is initiated. During the interrupt operation, the DMAC automatically
sets the corresponding DMAC Channel x (x = 0, 1) Suspend Flag
(DxSFI) to “1”. As soon as the CPU completes the interrupt opera-
tion, the DMAC clears the flag to “0” and resumes the original
operation from the point where it was suspended.
The suspended transfer due to the interrupt can also be resumed
during its interrupt process routine by writing “1” to the DMAC
Channel x (x = 0,1) Enable Bit (DxCEN).
The timing charts for a burst transfer caused by a hardware-re-
lated transfer request are shown in Figure 33.
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765-11E 8 BIT INPUT/OUTPUT EXPANDER, I2C INTERFACE, -40C to +125C, 20-QFN, TUBE
765-11R 8-bit I/O Expander with I2C Interface., -40C to +125C, 18-SOIC 300mil, TUBE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
764-3"x36yd-Red 功能描述:膠帶 764 RED 3X36 YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
764-3"x36yd-White 功能描述:膠帶 WHITE 3X36YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
764-3"x36yd-Yellow 功能描述:膠帶 764 YELLOW 3X36 YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
7643_06 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER
76430 制造商:Brady Corporation 功能描述:TAPE, BARRICADE, BLACK/PHOSPHORESCENT, 2INX5YD; Tape Type:Safety, Hazard Warning; Tape Backing Material:Polyester Film; Tape Width - Metric:50.8mm; Tape Width - Imperial:2"; Tape Length - Metric:4.572m; Tape Length - Imperial:5yard ;RoHS Compliant: NA
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