參數(shù)資料
型號(hào): ST72651AR6T1E/XXX
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PQFP64
封裝: 10 X 10 MM, ROHS COMPLIANT, TQFP-64
文件頁(yè)數(shù): 96/161頁(yè)
文件大?。?/td> 2656K
代理商: ST72651AR6T1E/XXX
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ST72651AR6
4/161
Doc ID 7215 Rev 4
1 INTRODUCTION
The ST7265x MCU supports volume data ex-
change with a host (computer or kiosk) via a full
speed USB interface. The MCU is capable of han-
dling various transfer protocols, with a particular
emphasis on mass storage applications.
ST7265x is compliant with the USB Mass Storage
Class specifications, and supports related proto-
cols such as BOT (Bulk Only Transfer) and CBI
(Control, Bulk, Interrupt).
It is based on the ST7 standard 8-bit core, with
specific peripherals for managing USB full speed
data transfer between the host and most types of
FLASH media card:
– A full speed USB interface with Serial Interface
Engine, and on-chip 3.3V regulator and trans-
ceivers.
– A dedicated 24 MHz Data Buffer Manager state
machine for handling 512-byte data blocks (this
size corresponds to a sector both on computers
and FLASH media cards).
– A Data Transfer Coprocessor (DTC), able to
handle fast data transfer with external devices.
This DTC also computes the CRC or ECC re-
quired to handle Mass storage media.
– An Arbitration block gives the ST7 core priority
over the USB and DTC when accessing the Data
Buffer. In USB mode, the USB interface is serv-
iced before the DTC.
– A FLASH Supply Block able to provide program-
mable supply voltage and I/O electrical levels to
the FLASH media.
Related Documentation
AN1475: Developing an ST7265x Mass Storage
Application
Figure 1. USB Data Transfer Block Diagram
512-byte RAM
Buffer
512-byte RAM
Buffer
DATA
COPROCESSOR
DATA TRANSFER
BUFFER
LEVEL
SHIFTERS
MASS
DEVICE
USB
SIE
ST7 CORE
STORAGE
TRANSFER
(DTC)
ARBITRATION
USB DATA
TRANSFER
BUFFER ACCESS
1
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