參數(shù)資料
型號(hào)： ST72P60E2M1
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO24
封裝： 0.300 INCH, LEAD FREE, PLASTIC, SOP-24
文件頁數(shù)： 89/118頁
文件大?。?/td> 2304K
代理商： ST72P60E2M1
ST7260
72/117
11.4 USB INTERFACE (USB)
11.4.1 Introduction
The USB Interface implements a low-speed func-
tion interface between the USB and the ST7 mi-
crocontroller. It is a highly integrated circuit which
includes the transceiver, 3.3 voltage regulator, SIE
and DMA. No external components are needed
apart from the external pull-up on USBDM for low
speed recognition by the USB host. The use of
DMA architecture allows the endpoint definition to
be completely flexible. Endpoints can be config-
ured by software as in or out.
11.4.2 Main Features
■ USB Specification Version 1.1 Compliant
■ Supports Low-Speed USB Protocol
■ Two or Three Endpoints (including default one)
depending on the device (see device feature list
and register map)
■ CRC
generation/checking,
NRZI
encoding/
decoding and bit-stuffing
■ USB Suspend/Resume operations
■ DMA Data transfers
■ On-Chip 3.3V Regulator
■ On-Chip USB Transceiver
11.4.3 Functional Description
The block diagram in Figure 38, gives an overview
of the USB interface hardware.
For general information on the USB, refer to the
“Universal Serial Bus Specifications” document
available at http//:www.usb.org.
Serial Interface Engine
The SIE (Serial Interface Engine) interfaces with
the USB, via the transceiver.
The SIE processes tokens, handles data transmis-
sion/reception, and handshaking as required by
the USB standard. It also performs frame format-
ting, including CRC generation and checking.
Endpoints
The Endpoint registers indicate if the microcontrol-
ler is ready to transmit/receive, and how many
bytes need to be transmitted.
DMA
When a token for a valid Endpoint is recognized by
the USB interface, the related data transfer takes
place, using DMA. At the end of the transaction, an
interrupt is generated.
Interrupts
By reading the Interrupt Status register, applica-
tion software can know which USB event has oc-
curred.
Figure 38. USB Block Diagram
CPU
MEMORY
Transceiver
3.3V
Voltage
Regulator
SIE
ENDPOINT
DMA
INTERRUPT
Address,
and interrupts
USBDM
USBDP
USBVCC
6 MHz
REGISTERS
data buses
USBGND
相關(guān)PDF資料
PDF描述
ST7260E2M1/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO24
ST72T141K2M6XXX 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO34
ST72T141K2M3XXX 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO34
ST72T141K2MARE 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO34
ST7FL09Y0MATRE 8-BIT, FLASH, 16 MHz, MICROCONTROLLER, PDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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ST72T101G2M6 功能描述:8位微控制器 -MCU RO 511-ST72C104G2M6 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
ST72T121J2B6 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
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