Datasheet > ATMEGA161(L)

ATMEGA161(L)

更新时间： 2024-11-23 23:33:11

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描述
ATmega161(L) Rev. E Errata [Updated 5/02. 3 Pages]

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ATMEGA161(L) 数据手册

Errata

• Brown-out Detector may cause the Device to be Stuck in Reset State

• PWM not Phase Correct

• Increased Interrupt Latency

• Interrupt Return Fails when Stack Pointer Addresses the External Memory

• Writing UBBRH Affects both UART0 and UART1

• Store Program Memory Instruction May Fail

6. Brown-out Detecor may cause the Device to be Stuck in Reset State

When the internal Brown-out Detector is enabled, the device may hang in Reset

state regardless of the V_CClevel.

8-bit

Problem Fix/Workaround

Microcontroller

with 16K Bytes

Flash

Use external Brown-out Detector and do not enable internal Brown-out Detector

(leave BODEN Fuse unprogrammed).

5. PWM not Phase Correct

In phase correct PWM mode, a change from OCRx = TOP to anything less than

TOP does not change the OCx output. This gives a phase error in the following

period.

ATmega161(L)

Rev. E

Problem Fix/Workaround

Make sure this issue is not harmful to the application.

4. Increased Interrupt Latency

In this device, some instructions are not interruptable, and will cause the interrupt

latency to increase. The only practical problem concerns a loop followed by a two-

word instruction while waiting for an interrupt. The loop may consist of a branch

instruction or an absolute or relative jump back to itself like this:

Errata Sheet

loop: rjmp loop

<Two-word instruction>

In this case, a dead-lock situation arises.

Problem Fix/Workaround

In assembly, insert a nop instruction immediately after a loop to itself. The prob-

lem will normally be detected during development. In C, the only construct that will

give this problem is an empty “for” loop; “for(;;)”. Use “while(1)” or “do{} while (1)”

to avoid the problem.

3. Interrupt Return Fails when Stack Pointer Addresses the External Memory

When Stack Pointer addresses external memory (SPH:SPL > $45F), returning

from interrupt will fail. The program counter will be updated with a wrong value

and thus the program flow will be corrupted.

Problem Fix/Workaround

Address the stack pointer to internal SRAM or disable interrupts while Stack

Pointer addresses external memory.

Rev. 2473B–AVR–05/02

12 3

中文翻译

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与ATMEGA161(L)相关器件

型号	品牌	获取价格	描述	数据表
ATMEGA161_07	ATMEL	获取价格	8-bit Microcontroller with 16K Bytes of In-System Programmable Flash
ATMEGA161-4AC	ATMEL	获取价格	8-bit Microcontroller with 16K Bytes In-System Programmable Flash
ATMEGA161-4AI	ATMEL	获取价格	8-bit Microcontroller with 16K Bytes In-System Programmable Flash
ATMEGA161-4JC	ATMEL	获取价格	8-bit Microcontroller with 16K Bytes In-System Programmable Flash
ATMEGA161-4JI	ATMEL	获取价格	8-bit Microcontroller with 16K Bytes In-System Programmable Flash
ATMEGA161-4PC	ATMEL	获取价格	8-bit Microcontroller with 16K Bytes In-System Programmable Flash
ATMEGA161-4PI	ATMEL	获取价格	8-bit Microcontroller with 16K Bytes In-System Programmable Flash
ATMEGA16-16AC	ATMEL	获取价格	8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash
ATMEGA16-16AI	ATMEL	获取价格	8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash
ATMEGA16-16AQR	MICROCHIP	获取价格	IC MCU 8BIT 16KB FLASH 44TQFP

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