ATMEGA162-16AI Atmel, ATMEGA162-16AI Datasheet - Page 110

• Manufacturer Part Number: ATMEGA162-16AI
• Description: IC MCU AVR 16K 5V 16MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA162-16AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

110
ATmega162/V
The following code examples show how to do an atomic read of the TCNTn Register contents.
Reading any of the OCRnA/B or ICRn Registers can be done by using the same principle.
Note:
The assembly code example returns the TCNTn value in the r17:r16 register pair.
Assembly Code Example
C Code Example
TIM16_ReadTCNTn:
unsigned int TIM16_ReadTCNTn( void )
{
}
; Save Global Inter?upt Flag
in
; Disable interrupt?
cli
; Read TCNTn into r17:r16
in
in
; Restore Global In?errupt Flag
out SREG,r18
ret
unsigned char sreg;
unsigned int i;
/* Save Global Inte?rupt Flag */
sreg = SREG;
/* Disable interrup?s */
_CLI();
/* Read TCNTn into i */
i = TCNTn;
/* Restore Global I?terrupt Flag */
SREG = sreg;
return i;
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”.
r18,SREG
r16,TCNTnL
r17,TCNTnH
(1)
(1)
2513K–AVR–07/09