AT90S8515-4JI Atmel, AT90S8515-4JI Datasheet - Page 57

• Manufacturer Part Number: AT90S8515-4JI
• Description: IC MCU 8K FLSH 4MHZ LV IT 44PLCC
• Manufacturer: Atmel
• Series: AVR® 90Sr

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: 32
• 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: -

BAUD Rate Generator
0841G–09/01
The baud rate generator is a frequency divider that generates baud rates according to
the following equation:
•
•
•
For standard crystal frequencies, the most commonly used baud rates can be generated
by using the UBRR settings in Table 17. UBRR values that yield an actual baud rate dif-
fering less than 2% from the target baud rate are boldface in the table. However, using
baud rates that have more than 1% error is not recommended. High error ratings give
less noise immunity.
BAUD = Baud rate
f
UBRR = Contents of the UART Baud Rate register, UBRR (0 - 255)
CK
= Crystal Clock frequency
BAUD
=
------------------------------------ -
16(UBRR
f
CK
+
1)
AT90S8515
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