AT89C5131A-L

Manufacturer Part NumberAT89C5131A-L
ManufacturerAtmel Corporation
AT89C5131A-L datasheets
 

Specifications of AT89C5131A-L

Flash (kbytes)32 KbytesMax. Operating Frequency48 MHz
Cpu8051-12CMax I/o Pins34
Usb Transceiver1Usb SpeedFull Speed
Usb InterfaceDeviceSpi1
Twi (i2c)1Uart1
Sram (kbytes)1.25Eeprom (bytes)1024
Self Program MemoryAPIOperating Voltage (vcc)3.0 to 3.6
Timers4IspUART/USB
WatchdogYes  
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Functional
The AT89C5131A bootloader facilitates In-System Programming and In-Application
Programming.
Description
In-System
In-System Programming allows the user to program or reprogram a microcontroller on-chip
Flash memory without removing it from the system and without the need of a pre-programmed
Programming
application.
Capability (IAP)
The USB bootloader can manage a communication with a host through the USB bus. It can also
access and perform requested operations on the on-chip Flash memory.
In-Application
In-Application Programming (IAP) allows the reprogramming of a microcontroller on-chip Flash
memory without removing it from the system and while the embedded application is running.
Programming or
Self Programming
The USB bootloader contains some Application Programming Interface routines named API rou-
Capability (ISP)
tines that allow IAP by using the user’s firmware.
Block Diagram
This section describes the different parts of the bootloader. Figure 1 shows the on-chip boot-
loader and IAP processes.
Figure 1. Bootloader Process Description
AT89C5131A USB Bootloader
2
External Host Via the
USB Protocol
Communication
ISP Communication
Management
On-chip
User
Application
IAP
User Call
Management
Flash Memory
Management
Flash
Memory
4287E–USB–04/08