AT90PWM3-16MQ Atmel, AT90PWM3-16MQ Datasheet - Page 189
![IC AVR MCU FLASH 8K 32QFN](/photos/12/13/121309/313-32-qfn_sml.jpg)
AT90PWM3-16MQ
Manufacturer Part Number
AT90PWM3-16MQ
Description
IC AVR MCU FLASH 8K 32QFN
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM3B-16SU.pdf
(361 pages)
Specifications of AT90PWM3-16MQ
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
27
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 11x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
32-QFN
Processor Series
AT90PWMx
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SPI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
27
Number Of Timers
2
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRFBKIT, ATAVRISP2
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 11 Channel
On-chip Dac
10 bit, 1 Channel
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOICATAVRMC200 - KIT EVAL FOR AT90PWM3 ASYNCATAVRFBKIT - KIT DEMO BALLAST FOR AT90PWM2ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK520 - ADAPTER KIT FOR 90PWM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90PWM3-16MQT
Manufacturer:
Atmel
Quantity:
1 325
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18.6
4317J–AVR–08/10
Data Transmission – USART Transmitter
that there are no unread data in the receive buffer. Note that the TXC flag must be cleared
before each transmission (before UDR is written) if it is used for this purpose.
The following simple USART initialization code examples show one assembly and one C func-
tion that are equal in functionality. The examples assume asynchronous operation using polling
(no interrupts enabled) and a fixed frame format. The baud rate is given as a function parameter.
For the assembly code, the baud rate parameter is assumed to be stored in the r17:r16
Registers.
Note:
More advanced initialization routines can be made that include frame format as parameters, dis-
able interrupts and so on. However, many applications use a fixed setting of the baud and
control registers, and for these types of applications the initialization code can be placed directly
in the main routine, or be combined with initialization code for other I/O modules.
The USART Transmitter is enabled by setting the Transmit Enable (TXEN) bit in the UCSRB
Register. When the Transmitter is enabled, the normal port operation of the TxDn pin is overrid-
den by the USART and given the function as the Transmitter’s serial output. The baud rate,
mode of operation and frame format must be set up once before doing any transmissions. If syn-
Assembly Code Example
C Code Example
TABLE 2.
USART_Init:
void USART_Init( unsigned int baud )
{
}
; Set baud rate
sts
sts
; Set frame format: 8data, no parity & 2 stop bits
ldi
sts
; Enable receiver and transmitter
ldi
sts
ret
/* Set baud rate */
UBRRH = (unsigned char)(baud>>8);
UBRRL = (unsigned char)baud;
/* Set frame format: 8data, no parity & 2 stop bits */
UCSRC = (0<<UMSEL)|(0<<UPM0)|(1<<USBS)|(3<<UCSZ0);
/* Enable receiver and transmitter */
UCSRB = (1<<RXEN0)|(1<<TXEN0);
1. The example code assumes that the part specific header file is included.
For I/O Registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI”
instructions must be replaced with instructions that allow access to extended I/O. Typically
“LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.
UBRRH, r17
UBRRL, r16
r16, (0<<UMSEL)|(0<<UPM0)|(1<<USBS)|(3<<UCSZ0)
UCSRC,r16
r16, (1<<RXEN0)|(1<<TXEN0)
UCSRB,r16
(1)
(1)
AT90PWM2/3/2B/3B
189
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