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AT89C5132-ROTIL Folha de dados(PDF) 9 Page - ATMEL Corporation

Nome de Peças AT89C5132-ROTIL
Descrição Electrónicos  USB Microcontroller with 64K Bytes Flash Memory
PDF  33 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5132-ROTIL Folha de dados(HTML) 9 Page - ATMEL Corporation

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9
4256B–USB–03/06
AT89C5132
Note:
1. X2B initializes the X2 bit in CKCON during the reset phase.
2. In order to ensure boot loader activation at first power-up, AT89C5132 products are delivered
with BLJB programmed.
3. Bits 0 to 3 (LSN) can only be programmed by hardware mode.
Reset Value = XXXX XXXX, UUUU UUUU after an hardware full chip erase.
Reset Value = XXXX XXXX, UUUU UUUU after an hardware full chip erase.
Physical Layer
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 supporting the In-System
Programming. Mostly, the USB specification is implemented by hardware (automatic reply,
handshakes, timings, …) and the USB Classes and SubClasses are implemented by software at
a data level.
Figure 3. USB Bus Topography
The USB used to transmit information has the following configuration:
•
USB DFU using the Default Control Endpoint only (endpoint 0) with a 32 bytes length.
•
48 MHz for USB controller: frequency auto-detection performed by the bootloader.
Table 6. SBV Byte – Software Boot Vector
7
6
5
4
3
2
1
0
ADD15
ADD14
ADD13
ADD12
ADD11
ADD10
ADD9
ADD8
Bit Number
Bit
Mnemonic
Description
7-0
ADD15:8
MSB of the user’s boot loader 16-bit address location
Refer to the boot loader datasheet for usage information (boot loader dependent)
Table 7. SSB Byte – Software Security Byte
7
6
5
4
3
2
1
0
SSB7
SSB6
SSB5
SSB4
SSB3
SSB2
SSB1
SSB0
Bit Number
Bit
Mnemonic
Description
7-0
SSB7:0
Software Security Byte Data
Refer to the boot loader datasheet for usage information (boot loader dependent)
PC (Host)
Application (Device)
USB line
Downstream Transfer: OUT
Upstream Transfer: IN
PC Driver
PC Application
Device driver/API
Firmware



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