at89c5131a ATMEL Corporation, at89c5131a Datasheet - Page 9

no-image

at89c5131a

Manufacturer Part Number
at89c5131a
Description
Usb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
at89c5131a-PUTUM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
at89c5131a-RDTIL
Manufacturer:
Atmel
Quantity:
10 000
Part Number:
at89c5131a-RDTUL
Manufacturer:
Atmel
Quantity:
10 000
Part Number:
at89c5131a-RDTUM
Manufacturer:
ATMEL
Quantity:
5 000
Part Number:
at89c5131a-RDTUM
Manufacturer:
Atmel
Quantity:
10 000
Part Number:
at89c5131a-S3SIM
Manufacturer:
Atmel
Quantity:
10 000
Part Number:
at89c5131a-S3SUL
Manufacturer:
Atmel
Quantity:
10 000
Part Number:
at89c5131a-S3SUM
Manufacturer:
ATMEL
Quantity:
46
Part Number:
at89c5131a-UL
Manufacturer:
TI
Quantity:
12 500
Part Number:
at89c5131a-UL
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
at89c5131a-UM
Manufacturer:
TOSHIBA
Quantity:
1 200
Part Number:
at89c5131a-UM
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
at89c5131a-UM
Quantity:
300
Physical Layer
48 MHz Frequency Auto-
Configuration
4287C–USB–11/04
The USB norm specifies all the transfers over the USB line. The USB specification also
includes several CLASS and SUB-CLASS specifications. These stand-alone documents
are used by the manufacturer to implement a USB link between a PC and a device sup-
porting the In System Programming. Mostly, the USB specification is implemented by
hardware (automatic reply, handshakes, timings, ...) and the USB Classes and Sub-
Classes are implemented by software at a data level.
Figure 4. USB Bus Topography
The USB is used to transmit information that has the following configuration:
The bootloader includes a function which will automatically setup the PLL frequency
(48MHz) versus the different XTAL configuration used on the application.
The table below shows the allowed frequencies compatible with the USB bootloader
48 MHz auto-generation.
X1 or X2
Modes
Clock
PC Driver
PC Application
USB DFU using the Default Control Endpoint only (endpoint 0) with a 32 bytes
length.
48 MHz for USB controller: USB clock configuration performed by the bootloader
6 MHz
OK
PC (Host)
8 MHz
OK
12 MHz
OK
AT89C5131A USB Bootloader
Downstream Transfer: OUT
Upstream Transfer: IN
16 MHz
OK
USB Line
20 MHz
OK
24 MHz
Application (Device)
OK
32 MHz
OK
Device driver/API
Firmware
40 MHz
OK
48 MHz
OK
9

Related parts for at89c5131a