MCU AVR 16K FLASH 16MHZ 40-PDIP

ATMEGA16A-PU

Manufacturer Part NumberATMEGA16A-PU
DescriptionMCU AVR 16K FLASH 16MHZ 40-PDIP
ManufacturerAtmel
SeriesAVR® ATmega
ATMEGA16A-PU datasheets
 


Specifications of ATMEGA16A-PU

Core ProcessorAVRCore Size8-Bit
Speed16MHzConnectivityI²C, SPI, UART/USART
PeripheralsBrown-out Detect/Reset, POR, PWM, WDTNumber Of I /o32
Program Memory Size16KB (8K x 16)Program Memory TypeFLASH
Eeprom Size512 x 8Ram Size1K x 8
Voltage - Supply (vcc/vdd)2.7 V ~ 5.5 VData ConvertersA/D 8x10b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case40-DIP (0.600", 15.24mm)Processor SeriesATMEGA16x
CoreAVR8Data Bus Width8 bit
Data Ram Size1 KBInterface Type2-Wire/SPI/USART
Maximum Clock Frequency16 MHzNumber Of Programmable I/os32
Number Of Timers3Maximum Operating Temperature+ 85 C
Mounting StyleThrough Hole3rd Party Development ToolsEWAVR, EWAVR-BL
Development Tools By SupplierATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKITMinimum Operating Temperature- 40 C
On-chip Adc8-ch x 10-bitPackage40PDIP
Device CoreAVRFamily NameATmega
Maximum Speed16 MHzOperating Supply Voltage3.3|5 V
Controller Family/seriesAVR MEGANo. Of I/o's32
Eeprom Memory Size512ByteRam Memory Size1KB
Cpu Speed16MHzRohs CompliantYes
For Use WithATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KITLead Free Status / RoHS StatusLead free / RoHS Compliant
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Page 94/352

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Figure 16-2. Counter Unit Block Diagram
Signal description (internal signals):
Count
Direction
Clear
clk
TOP
BOTTOM
The 16-bit counter is mapped into two 8-bit I/O memory locations: Counter High (TCNT1H) con-
taining the upper eight bits of the counter, and Counter Low (TCNT1L) containing the lower 8
bits. The TCNT1H Register can only be indirectly accessed by the CPU. When the CPU does an
access to the TCNT1H I/O location, the CPU accesses the High byte temporary register
(TEMP). The temporary register is updated with the TCNT1H value when the TCNT1L is read,
and TCNT1H is updated with the temporary register value when TCNT1L is written. This allows
the CPU to read or write the entire 16-bit counter value within one clock cycle via the 8-bit data
bus. It is important to notice that there are special cases of writing to the TCNT1 Register when
the counter is counting that will give unpredictable results. The special cases are described in
the sections where they are of importance.
Depending on the mode of operation used, the counter is cleared, incremented, or decremented
at each timer clock (clk
selected by the Clock Select bits (CS12:0). When no clock source is selected (CS12:0 = 0) the
timer is stopped. However, the TCNT1 value can be accessed by the CPU, independent of
whether clk
count operations.
The counting sequence is determined by the setting of the Waveform Generation Mode bits
(WGM13:0) located in the Timer/Counter Control Registers A and B (TCCR1A and TCCR1B).
There are close connections between how the counter behaves (counts) and how waveforms
are generated on the Output Compare outputs OC1x. For more details about advanced counting
sequences and waveform generation, see
The Timer/Counter Overflow (TOV1) Flag is set according to the mode of operation selected by
the WGM13:0 bits. TOV1 can be used for generating a CPU interrupt.
ATmega16A
94
DATA BUS
(8-bit)
TEMP (8-bit)
Count
TCNTnH (8-bit)
TCNTnL (8-bit)
Clear
Direction
TCNTn (16-bit Counter)
Increment or decrement TCNT1 by 1.
Select between increment and decrement.
Clear TCNT1 (set all bits to zero).
Timer/Counter clock.
T
1
Signalize that TCNT1 has reached maximum value.
Signalize that TCNT1 has reached minimum value (zero).
). The clk
can be generated from an external or internal clock source,
T
1
T
1
is present or not. A CPU write overrides (has priority over) all counter clear or
T
1
“Modes of Operation” on page
TOVn
(Int.Req.)
Clock Select
Edge
Detector
clk
Tn
Control Logic
( From Prescaler )
TOP
BOTTOM
99.
Tn
8154B–AVR–07/09