ST72651AR6 STMicroelectronics, ST72651AR6 Datasheet - Page 57

• Manufacturer Part Number: ST72651AR6
• Description: LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI
• Manufacturer: STMicroelectronics

Specifications of ST72651AR6

• Dual Supply Management: analog voltage detector on the USB power line to enable smart power switching from USB power to battery (on E suffix devices).
• Programmable Internal Voltage Regulator For Memory Cards (2.8v To 3.5v) Supplying: Flash Card I/O lines (voltage shifting)
• 5 Usb Endpoints: 1 control endpoint
• Dtc (data Transfer Coprocessor): Universal Serial/Parallel communications interface, with software plug-ins for current and future protocol standards

11.2 DATA TRANSFER COPROCESSOR (DTC)
11.2.1 Introduction
The Data Transfer Coprocessor is a Universal Se-
rial/Parallel Communications Interface. By means
of software plug-ins provided by STMicroelectron-
ics, the user can configure the ST7 to handle a
wide range of protocols and physical interfaces
such as:
Support for different devices or future protocol
standards does not require changing the micro-
controller hardware, but only installing a different
software plug-in.
Once the plug-in (up to 256 bytes) stored in the
FLASH memory of the ST7 device is loaded in the
DTC RAM, and that the DTC operation is started,
Figure 34. DTC Block Diagram
– 8 or 16-bit IDE mode Compact Flash
– Multimedia Card (MMC protocol)
– SmartMediaCard
– Secure Digital Card
I/O PORTS
DTCCR
0
0
0
MSB
DTCPR
ERR
EN
STOP
EN
LOAD INIT
DTCSR
COPROCESSOR
0
TRANSFER
DTC RAM
DATA
0
Doc ID 7215 Rev 4
RUN
0
0
the I/O ports mapped to the DTC assume specific
alternate functions.
Main Features
■
■
■
■
11.2.2 Functional Description
The block diagram is shown in
main function of the DTC is to quickly transfer data
between:
■
■
The protocol used to read or write from the I/O port
is defined by the S/W plug-in in the DTC RAM.
0
Full-Speed data transfer from USB to I/O ports
without ST7 core intervention
Protocol-independency
Support for serial and parallel devices
Maskable Interrupts
USB and ST7 I/O ports
in between ST7 I/O ports
ST7 DATA/ADDRESS BUS
LSB
0
ERRORSTOP
TRANSFER
BUFFER
DATA
INTERRUPT REQUEST
Figure
ST72651AR6
TO USB
INTERFACE
34. The
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