ATMEGA88PA-CCU Atmel, ATMEGA88PA-CCU Datasheet - Page 204
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ATMEGA88PA-CCU
Manufacturer Part Number
ATMEGA88PA-CCU
Description
IC MCU AVR 8K FLASH 32VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA88PA-CCU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VFQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
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19.11.5
8271C–AVR–08/10
UBRRnL and UBRRnH – USART Baud Rate Registers
Table 19-11. UCPOLn Bit Settings
• Bit 15:12 – Reserved
These bits are reserved for future use. For compatibility with future devices, these bit must be
written to zero when UBRRnH is written.
• Bit 11:0 – UBRR[11:0]: USART Baud Rate Register
This is a 12-bit register which contains the USART baud rate. The UBRRnH contains the four
most significant bits, and the UBRRnL contains the eight least significant bits of the USART
baud rate. Ongoing transmissions by the Transmitter and Receiver will be corrupted if the baud
rate is changed. Writing UBRRnL will trigger an immediate update of the baud rate prescaler.
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
Bit
Read/Write
Initial Value
UCPOLn
0
1
Transmitted Data Changed (Output of
TxDn Pin)
Rising XCKn Edge
Falling XCKn Edge
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
UBRRn[7:0]
R/W
R/W
11
3
0
0
Received Data Sampled (Input on RxDn
Pin)
Falling XCKn Edge
Rising XCKn Edge
R/W
R/W
10
2
0
0
UBRRn[11:8]
R/W
R/W
9
1
0
0
R/W
R/W
8
0
0
0
UBRRnH
UBRRnL
204
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