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ATMEGA162-16PU 其他数据使用手册 - Microchip(微芯)
制造商:
Microchip(微芯)
分类:
8位微控制器
封装:
DIP-40
描述:
ATmega 系列 16 MHz 16 KB 闪存 1 KB SRAM 8 位 微控制器 - DIP-40
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ATMEGA162-16PU数据手册
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AVR082: Replacing ATmega161 by ATmega162
Features
• ATmega161 Errata Corrected in ATmega162
• Improvements to Timer/Counters
• Improvements to External Memory Interface
• Improvements to UART
• Changes in EEPROM Write Timing
• Changes in Programming Interface
• Fuse Settings
• Oscillators and Selecting Start-up Delays
• Changes to Watchdog Timer
• JTAG Interface
• Other Concerns
• Features not Available in ATmega161 Compatibility Mode
Introduction
This application note is a guide to assist current ATmega161 users in converting exist-
ing designs to the ATmega162. The ATmega162 has two operating modes selected
through the fuse settings. The M161C Fuse selects whether the ATmega161 compati-
bility mode should be used or not. By default, the M161C Fuse is unprogrammed and
the ATmega162 operates in Normal mode. When the compatibility mode is used, only
non-conflicting enhancements make the part different from the ATmega161. Addition-
ally, the electrical characteristics of the ATmega162 are different including an increase
in operating frequency because of a change in process technology. Check the data
sheet for detailed information. When the M161C Fuse is unprogrammed, all new fea-
tures are supported, but porting the code may require more work.
ATmega161 Errata Corrected in ATmega162
The following items from the Errata Sheets of the ATmega161 do not apply to the
ATmega162. Refer to the ATmega161 Errata Sheet for a more detailed description of
the Errata.
PWM not Phase Correct
All Timers in ATmega162 have been redesigned to generate phase correct PWM.
Increased Interrupt Latency
In ATmega162, all instructions are interruptable, and no dead-lock situation exists if a
loop is followed by a two-word instruction for the purpose of looping until an interrupt
goes active.
8-bit
Microcontroller
Application
Note
Rev. 2516D–AVR–01/04
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