AT90S8515-4JI Atmel, AT90S8515-4JI Datasheet

AT90S8515-4JI

Manufacturer Part Number

AT90S8515-4JI

Description

IC MCU 8K FLSH 4MHZ LV IT 44PLCC

Manufacturer

Atmel

Series

AVR® 90Sr

Datasheets

1.AT90S8515-4AC.pdf (112 pages)

2.AT90S8515-4AC.pdf (4 pages)

3.AT90S8515-4AC.pdf (4 pages)

Specifications of AT90S8515-4JI

Core Processor

AVR

Core Size

8-Bit

Speed

4MHz

Connectivity

SPI, UART/USART

Peripherals

Brown-out Detect/Reset, POR, PWM, WDT

Number Of I /o

Program Memory Size

8KB (4K x 16)

Program Memory Type

FLASH

Eeprom Size

512 x 8

Ram Size

512 x 8

Voltage - Supply (vcc/vdd)

2.7 V ~ 6 V

Oscillator Type

Internal

Operating Temperature

-40°C ~ 85°C

Package / Case

44-PLCC

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Data Converters

Current page: 1 of 4
Download datasheet (65Kb)

Errata

•

11. LDS/STS when Accessing External RAM

10. STS when Accessing EEPROM

9. COM1B Settings Never Disconnects OC1B

8. UART Loses Synchronization if RXD Line is Low when UART Receive is

LDS/STS when Accessing External RAM

STS when Accessing EEPROM

COM1B Settings Never Disconnects OC1B

UART Loses Synchronization if RXD Line is Low when UART Receive is Disabled

Releasing Reset Condition without Clock

Lock Bits at High V

The SPI Can Send Wrong Byte

Reset during EEPROM Write

SPI Interrupt Flag Can be Undefined after Reset

Serial Programming at Voltages below 3.0 Volts

Skip Instructions with Interrupts

Using an LDS instruction for reading external RAM corrupts the source register

used in the LDS instruction when directly followed by NOP. An STS instruction for

writing to external RAM corrupts R0 when directly followed by NOP.

Problem Fix/Workaround

Do not insert a NOP instruction directly after an LDS or STS instruction used for

accessing the external RAM.

If the STS instruction is used to start an EEPROM write (EEWE in EECR), the

following instruction may have an undesired result. In the case of NOP, R0

will be corrupted.

Problem Fix/Workaround

Use the OUT or SBI instruction to start an EEPROM write.

According to the datasheet, Timer/Counter1 should be disconnected from the

O C 1 B p i n w h e n C O M 1 B [ 1 : 0 ] = “ 0 0 ” i n n o n - P W M m o d e , a n d w h e n

COM1B[1:0] = “00” or “01” in PWM mode. This, however, is not the case.

For OC1A, the description in the datasheet is correct; the general digital I/O func-

tion takes over.

Problem Fix/Workaround

As OC1B is an output only pin with no general digital I/O function, the pin cannot

be tri-staded. However, if there is a need to stop the pin from toggling, disable the

PWM mode by setting PWM[1:0] to “00” and set the COM1A[1:0] to anything else

than “01” (which is the toggle mode). Warning: As long as the timer is still running,

the counter can count to a value above the maximum for that PWM mode. As an

alternative, the timer can be stopped by setting CS1[2:0] in TCCR1B to “000”.

Disabled

The UART will detect an UART start bit and start reception even if the UART is not

enabled. If this occurs, the first byte after reenabling the UART will be corrupted.

Problem Fix/Workaround

Make sure that the RX line is high at start-up and when the UART is disabled. An

external RS232-level converter keeps the line high during start-up.

8-bit

Microcontroller

with 8K Bytes

In-System

Programmable

Flash

AT90S8515

Rev. B

Errata Sheet

Rev. 1195E–09/01

Related parts for AT90S8515-4JI

AT90S8515-4JI Summary of contents

Page 1

... If this occurs, the first byte after reenabling the UART will be corrupted. Problem Fix/Workaround Make sure that the RX line is high at start-up and when the UART is disabled. An external RS232-level converter keeps the line high during start-up. 8-bit Microcontroller with 8K Bytes In-System Programmable Flash AT90S8515 Rev. B Errata Sheet Rev. 1195E–09/01 1 ...

Page 2

... Clear the SPI interrupt flag before enabling the interrupt. 2. Serial Programming at Voltages below 3.0 Volts At voltages below 3.0 volts, serial programming might fail. Problem Fix/Workaround Keep V at 3.0 volts or higher during In-System Programming. CC AT90S8515 Errata 2 and temperature. In this situation, it will not be possible 1195E–09/01 ...

Page 3

... In this situation, the address of the second word in the 2-word instruction is stored. This means that on return from interrupt, the second word of the 2-word command will be decoded and executed as an instruction. The AT90S8515 has two 2-word instructions: LDS and STS. Note 1: This can only occur if all of the following conditions are true skip instruction is followed by a 2-word instruction ...

Page 4

... No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. ...

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