ATMEGA16HVA-4CKU Atmel, ATMEGA16HVA-4CKU Datasheet - Page 86
![MCU AVR 16K FLASH 4MHZ 36-LGA](/photos/12/32/123221/36ck1-lga_sml.jpg)
ATMEGA16HVA-4CKU
Manufacturer Part Number
ATMEGA16HVA-4CKU
Description
MCU AVR 16K FLASH 4MHZ 36-LGA
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16HVA-4CKU.pdf
(196 pages)
Specifications of ATMEGA16HVA-4CKU
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
36-LGA
Processor Series
ATMEGA16x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SPI
Maximum Clock Frequency
4 MHz
Number Of Programmable I/os
6
Number Of Timers
2
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRSB200, ATAVRSB201
Minimum Operating Temperature
- 20 C
On-chip Adc
12 bit, 5 Channel
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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17.9
86
Accessing Registers in 16-bit Mode
ATmega8HVA/16HVA
Figure 17-8. Timer/Counter Timing Diagram, Setting of OCFnx, with Prescaler (f
shows the setting of OCFnA and the clearing of TCNTn in CTC mode.
Figure 17-9. Timer/Counter Timing Diagram, CTC mode, with Prescaler (f
In 16-bit mode (the TCWn bit is set to one) the TCNTnH/L and OCRnB/A are 16-bit registers that
can be accessed by the AVR CPU via the 8-bit data bus. The 16-bit register must be byte
accessed using two read or write operations. The 16-bit Timer/Counter has a single 8-bit register
for temporary storing of the high byte of the 16-bit access. The same temporary register is
shared between all 16-bit registers. Accessing the low byte triggers the 16-bit read or write oper-
ation. When the low byte of a 16-bit register is written by the CPU, the high byte stored in the
temporary register, and the low byte written, are both copied into the 16-bit register in the same
clock cycle. When the low byte of a 16-bit register is read by the CPU, the high byte of the 16-bit
register is copied into the temporary register in the same clock cycle as the low byte is read.
There is one exception in the temporary register usage. In the Output Compare mode the 16-bit
Output Compare Register OCRnB/A is read without the temporary register, because the Output
Compare Register contains a fixed value that is only changed by CPU access. However, in 16-
bit Input Capture mode the ICRn register formed by the OCRnA and OCRnB registers must be
accessed with the temporary register.
To do a 16-bit write, the high byte must be written before the low byte. For a 16-bit read, the low
byte must be read before the high byte.
TCNTn
TCNTn
(clk
(clk
OCRnx
OCFnx
(CTC)
OCRnx
OCFnx
clk
clk
clk
clk
I/O
PCK
I/O
Tn
PCK
Tn
/8)
/8)
OCRnx - 1
TOP - 1
OCRnx
TOP
OCRnx Value
TOP
OCRnx + 1
BOTTOM
clk_I/O
BOTTOM + 1
OCRnx + 2
/8)
clk_I/O
8024A–AVR–04/08
/8)
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