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參數資料
| 型號： | AT43USB353M-AC |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Low Cost Full-speed USB Microcontroller with Embedded Hub, ADC and PWM |
| 中文描述： | 8-BIT, MROM, 24 MHz, RISC MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, PLASTIC, MS-026BBC, LQFP-48 |
| 文件頁數： | 80/95頁 |
| 文件大?。?/td> | 568K |
| 代理商： | AT43USB353M-AC |
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80
AT43USB353M
3307B–USB–4/04
Set by hardware due to babble, physical disconnect or overcurrent except for Port 1 in which
case it is set by hardware at EOF2 due to hardware events. Cleared by firmware via Host
request ClearPortFeature(PORT_ENABLE).
Bit 0 – PCSC: Port Connect Status Change
0 = No change has occurred on Current Connect Status
1 = Current Connect Status has changed
This bit is set by hardware at EOF2 after it detects a connect or disconnect at a port, except for
Port 1. Hardware sets this bit for Port 5 after a hub reset. Cleared by firmware via Host request
ClearPortFeature(PORT_CONNECTION).
Hub and Port Power
Management
Overcurrent protection and power switching is required for the external downstream ports
only. In the AT43USB353M, these tasks are completely programmable. This means that any
type of hub is achievable with the AT43USB353M: self-powered or bus-powered hubs, per
port or global overcurrent protection, individual or ganged port power switching.
The use of the MCU's GPIO pins are required to interface to the external power supply moni-
toring and switching. The on-chip hardware of the AT43USB353M contains the circuitry to
handle all the possible combinations of port power management tasks. The firmware defines
the exact configuration.
Overcurrent Sensing
The AT43USB353M is capable of detecting overcurrent during active operation only, or during
any condition even when the hub is in the suspended state. When overcurrent in the active
state only is desired, any GPIO pin of the AT43USB353M can be used to sense and the over-
current condition. Control of the condition must be performed by the firmware. If overcurrent
detection under any condition is desired, then specific GPIO pins must be used to sense the
overcurrent and the proper bit(s) of UOVCER set. In Global Overcurrent Protection mode,
overcurrent sensing must be routed to GPIO PD0. In Individual Port Overcurrent Protection
mode Port2 and Port 3 overcurrent sensing must be assigned to GPIO PD0 and PD1. In the
following description, it is assumed that overcurrent protection is required under any condition.
1.
Global Overcurrent Protection
– In this mode, the Port Overcurrent Indicator and
Port Overcurrent Indicator Change should be set to 0's. For the AT43USB353M an
external solid state switch, such as the Micrel MIC2025-2, is required to switch power
to the external USB ports. The FLG output of the switch should be connected to PD0.
When an overcurrent occurs, FLG is asserted and the firmware should set the Hub
Overcurrent Indicator and Hub Overcurrent Indicator Change and switch off power to
all external downstream ports. The hub status change is reported on the next IN token
through the hub's interrupt endpoint, Endpoint1.
2.
Individual Port Overcurrent Protection
– The Hub Overcurrent Indicator and Hub
Overcurrent Indicator Change bits should be set to 0's. One MIC2026-2 is required for
the two USB ports. The FLG output of the MIC2026-2 associated with Port2 should be
connected to GPIO PD0 and the other FLG output to PD1. An overcurrent is indicated
by assertion of FLG. The firmware sets the corresponding port's Overcurrent Indicator
and the Overcurrent Indicator Change bits and switches off power to the port. At the
next IN token from the Host, the AT43USB353M reports the port status change through
the hub's Endpoint1.
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相關代理商/技術參數 |
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| AT43USB355 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
| AT43USB355_02 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Full speed USB Microcontroller with Embedded Hub, ADC and PWM |
| AT43USB355_06 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Full-speed USB Microcontroller with Embedded Hub, ADC and PWM |
| AT43USB355E-AC | 功能描述:8位微控制器 -MCU USB GAME CONTROL w/EMBED HUB-COM TEMP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| AT43USB355E-AU | 功能描述:8位微控制器 -MCU USB GAME CONTROL w/ EMBED HUB RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
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