ATMEGA16HVA-4TU Atmel, ATMEGA16HVA-4TU Datasheet - Page 89
ATMEGA16HVA-4TU
Manufacturer Part Number
ATMEGA16HVA-4TU
Description
MCU AVR 16K FLASH 4MHZ 28-TSOP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16HVA-4CKU.pdf
(196 pages)
Specifications of ATMEGA16HVA-4TU
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
7
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 9 V
Data Converters
A/D 5x12b
Oscillator Type
External
Operating Temperature
-20°C ~ 85°C
Package / Case
28-TSOP
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
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Part Number:
ATMEGA16HVA-4TU
Manufacturer:
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17.9.1
8024A–AVR–04/08
Reusing the temporary high byte register
The following code examples show how to do an atomic write of the TCNTnH/L register con-
tents. Writing any of the OCRnB/A registers can be done by using the same principle.
Note:
The assembly code example requires that the r17:r16 register pair contains the value to be writ-
ten to TCNTnH/L.
If writing to more than one 16-bit register where the high byte is the same for all registers written,
then the high byte only needs to be written once. However, note that the same rule of atomic
operation described previously also applies in this case.
Assembly Code Example
TIMn_WriteTCNTn:
C Code Example
void TIMn_WriteTCNTn( unsigned int i )
{
}
; Save global interrupt flag
in r18,SREG
; Disable interrupts
cli
; Set TCNTn to r17:r16
out TCNTnH,r17
out TCNTnL,r16
; Restore global interrupt flag
out SREG,r18
ret
unsigned char sreg;
unsigned int i;
/* Save global interrupt flag */
sreg = SREG;
/* Disable interrupts */
_CLI();
/* Set TCNTn to i */
TCNTn = i;
/* Restore global interrupt flag */
SREG = sreg;
See “About Code Examples” on page 7.
ATmega8HVA/16HVA
89
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