AT90S4433-8PC Atmel, AT90S4433-8PC Datasheet - Page 59
AT90S4433-8PC
Manufacturer Part Number
AT90S4433-8PC
Description
IC MCU 4K FLSH 8MHZ A/D 28DIP
Manufacturer
Atmel
Series
AVR® 90Sr
Datasheet
1.AT90S4433-8AC.pdf
(126 pages)
Specifications of AT90S4433-8PC
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
20
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 6 V
Data Converters
A/D 6x10b
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
28-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT90S4433-8PC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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Baud Rate Generator
1042H–AVR–04/03
• Bit 3 – TXEN: Transmitter Enable
This bit enables the UART Transmitter when set (one). When disabling the Transmitter
while transmitting a character, the Transmitter is not disabled before the character in the
Shift Register plus any following character in UDR has been completely transmitted.
• Bit 2 – CHR9: 9-bit Characters
When this bit is set (one), transmitted and received characters are nine bits long, plus
start and stop bits. The ninth bit is read and written by using the RXB8 and TXB8 bits in
UCSRB, respectively. The ninth data bit can be used as an extra stop bit or a parity bit.
• Bit 1 – RXB8: Receive Data Bit 8
When CHR9 is set (one), RXB8 is the ninth data bit of the received character.
• Bit 0 – TXB8: Transmit Data Bit 8
When CHR9 is set (one), TXB8 is the ninth data bit in the character to be transmitted.
The Baud Rate Generator is a frequency divider, which generates baud rates according
to the following equation:
•
•
•
For standard crystal frequencies, the most commonly used baud rates can be generated
by using the UBR settings in Table 19. UBR values that yield an actual baud rate differ-
ing 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 resistance.
BAUD = Baud Rate
f
UBR = Contents of the UBRRHI and UBRR Registers, (0 - 4095)
CK
= Crystal Clock frequency
BAUD
=
--------------------------------- -
16(UBR
f
CK
+
1 )
AT90S/LS4433
59
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