AT90S4433-8AC Atmel, AT90S4433-8AC Datasheet - Page 61

• Manufacturer Part Number: AT90S4433-8AC
• Description: IC MCU 4K FLSH 8MHZ A/D 32TQFP
• Manufacturer: Atmel
• Series: AVR® 90Sr

Specifications of AT90S4433-8AC

• 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: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

UART Baud Rate Register –
UBRR
1042H–AVR–04/03
This is a 12-bit register that contains the UART Baud Rate according to the equation on
the previous page. The UBRRHI contains the four most significant bits, and the UBRR
contains the eight least significant bits of the UART Baud Rate.
Bit
$03 ($23)
$09 ($29)
Read/Write
Initial Value
MSB
R/W
15
R
–
7
0
0
R/W
14
R
–
6
0
0
R/W
13
R
–
5
0
0
R/W
12
R
–
4
0
0
MSB
R/W
R/W
11
3
0
0
R/W
R/W
10
2
0
0
AT90S/LS4433
R/W
R/W
9
1
0
0
LSB
LSB
R/W
R/W
8
0
0
0
UBRRHI
UBRR
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