ATmega16A Atmel Corporation, ATmega16A Datasheet - Page 169

• Manufacturer Part Number: ATmega16A
• Manufacturer: Atmel Corporation

Specifications of ATmega16A

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

19.10.7
8154B–AVR–07/09
UCSRC – USART Control and Status Register C
• Bit 0 – TXB8: Transmit Data Bit 8
TXB8 is the ninth data bit in the character to be transmitted when operating with serial frames
with nine data bits. Must be written before writing the low bits to UDR.
The UCSRC Register shares the same I/O location as the UBRRH Register. See the
UBRRH/ UCSRC Registers” on page 164
• Bit 7 – URSEL: Register Select
This bit selects between accessing the UCSRC or the UBRRH Register. It is read as one when
reading UCSRC. The URSEL must be one when writing the UCSRC.
• Bit 6 – UMSEL: USART Mode Select
This bit selects between Asynchronous and Synchronous mode of operation.
Table 19-4.
• Bit 5:4 – UPM1:0: Parity Mode
These bits enable and set type of parity generation and check. If enabled, the transmitter will
automatically generate and send the parity of the transmitted data bits within each frame. The
Receiver will generate a parity value for the incoming data and compare it to the UPM0 setting.
If a mismatch is detected, the PE Flag in UCSRA will be set.
Table 19-5.
• Bit 3 – USBS: Stop Bit Select
This bit selects the number of Stop Bits to be inserted by the Transmitter. The Receiver ignores
this setting.
Table 19-6.
Bit
Read/Write
Initial Value
UPM1
0
0
1
1
UMSEL
0
1
UMSEL Bit Settings
UPM Bits Settings
USBS Bit Settings
URSEL
USBS
R/W
7
1
0
1
UMSEL
R/W
6
0
Mode
UPM0
Asynchronous Operation
Synchronous Operation
0
1
0
1
UPM1
R/W
5
0
section which describes how to access this register.
UPM0
Parity Mode
Disabled
Reserved
Enabled, Even Parity
Enabled, Odd Parity
R/W
4
0
USBS
R/W
3
0
UCSZ1
Stop Bit(s)
R/W
2
1
1-bit
2-bit
UCSZ0
R/W
1
1
ATmega16A
UCPOL
R/W
0
0
“Accessing
UCSRC
169