參數(shù)資料
型號(hào)： TUSB3410VF
英文描述： BUS CONTROLLER
中文描述： 總線控制器
文件頁(yè)數(shù)： 42/92頁(yè)
文件大?。?/td> 317K
代理商： TUSB3410VF
6
–
2
6.1.1
DMACDR1: DMA Channel Definition Register (UART Transmit Channel) (Addr:FFE0)
These registers are used to define the EDB number that the DMA uses for data transfer to the UARTS. In addition,
these registers define the data transfer direction and selects X or Y as the transaction buffer.
7
6
5
4
3
2
1
0
EN
R/W
INE
R/W
CNT
R/W
XY
R/W
T/R
R/O
E2
R/W
E1
R/W
E0
R/W
BIT
2
–
0
3
NAME
E[2:0]
T/R
RESET
0
0
FUNCTION
Endpoint descriptor pointer. This field points to a set of EDB registers that is to be used for a given transfer.
This bit is always zero, indicating that the DMA data transfer is from SRAM to the UART TDR register. (The MCU
cannot change this bit.)
X/Y buffer select bit. Valid only when CNT = 0
XY = 0
XY = 1
Next buffer to transmit/receive is the Y buffer
DMA continuous transfer control bit. This bit defines the mode of the DMA transfer.
CNT = 0
Burst mode:
The DMA stops the transfer when the byte count is zero or when a partial packet has been
received (byte count < 64). At the end of transfer, the high-to-low transition of EN interrupts the MCU (if
enabled). In this mode, the X/Y bit is set by the MCU to define the current buffer (X or Y).
CNT = 1
Continuous mode:
In this mode, the DMA and UBM alternate between the X- and Y-buffers. The DMA
sets the X/Y bit and the UBM uses it for the transfer. The DMA alternates between the X-/Y-buffers and
continues transmitting (from X-/Y-buffer) without MCU intervention. The DMA terminates, and interrupts
the MCU, under the following conditions:
1. When the UBM byte count < buffer size (in EDB), the DMA transfers the partial packet and interrupt
the MCU on completion.
2. Transaction timer expires. The DMA interrupts the MCU.
DMA Interrupt enable/disable bit. This bit is used to enable/disable the interrupt on transfer completion.
INE = 0
Interrupt is disabled. In addition, PPKT and TXFT do not clear the EN-bit and the DMAC is not disabled.
INE = 1
Enables the EN interrupt. When this bit is set, the DMA interrupts the MCU on a 1 to 0 transition of the
EN bit. (When transfer is completed, EN = 0)
DMA channel enable bit. The MCU sets this bit to start the DMA transfer. When the transfer completes, or when it
is terminated due to error, this bit is cleared. The 1 to 0 transition of this bit generates an interrupt (if interrupt is
enabled).
EN = 0
DMA is halted. The DMA is halted when the byte count reaches zero or transaction time-out occurs. When
halted, the DMA updates the byte count, sets NAK = 0 in OEDB, and interrupts the MCU (if INE = 1).
EN = 1
Setting this bit starts the DMA transfer.
4
XY
0
Next buffer to transmit/receive is the X buffer
5
CNT
0
6
INE
0
7
EN
0
相關(guān)PDF資料
PDF描述
TV2050MK5 TV_ICs:
TVGA9000 LOW COST VGA CONTROLLER
TVP3020-200PCE Video DAC with Color Palette (RAMDAC)
TVP3025-220PCE Video DAC with Color Palette (RAMDAC)
TVR1B TOSHIBA Fast Recovery Diode Silicon Diffused Type
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TUSB3410VFG4 功能描述:USB 接口集成電路 RS232/IrDA Ser-to-USB Converter RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
TUSB4020BIPHP 功能描述:USB Hub Controller USB 2.0 USB Interface 48-HTQFP (7x7) 制造商:texas instruments 系列:- 包裝:管件 零件狀態(tài):有效 協(xié)議:USB 功能:集線器控制器 接口:USB 標(biāo)準(zhǔn):USB 2.0 電壓 - 電源:1.1V，3.3V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 封裝/外殼:48-TQFP 裸露焊盤 供應(yīng)商器件封裝:48-HTQFP（7x7） 標(biāo)準(zhǔn)包裝:250
TUSB4020BIPHPR 功能描述:IC USB 2.0 2PORT HUB IND 48HTQFP 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 協(xié)議:USB 功能:集線器控制器 接口:USB 標(biāo)準(zhǔn):USB 2.0 電壓 - 電源:1.1V，3.3V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 封裝/外殼:48-TQFP 裸露焊盤 供應(yīng)商器件封裝:48-HTQFP（7x7） 標(biāo)準(zhǔn)包裝:1
TUSB4020BIPHPRQ1 功能描述:USB Hub Controller USB 2.0 USB Interface 48-HTQFP (7x7) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 協(xié)議:USB 功能:集線器控制器 接口:USB 標(biāo)準(zhǔn):USB 2.0 電壓 - 電源:1.1V，3.3V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 封裝/外殼:48-TQFP 裸露焊盤 供應(yīng)商器件封裝:48-HTQFP（7x7） 標(biāo)準(zhǔn)包裝:1
TUSB4020BPHPEVM 功能描述:TUSB4020B - Interface, USB 2.0 Hub Evaluation Board 制造商:texas instruments 系列:- 零件狀態(tài):有效 主要用途:接口，USB 2.0 集線器 嵌入式:- 使用的 IC/零件:TUSB4020B 主要屬性:2 通道（雙路） 輔助屬性:LED 狀態(tài)指示器 所含物品:板 標(biāo)準(zhǔn)包裝:1
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*