ATMEGA169 ATMEL [ATMEL Corporation], ATMEGA169 Datasheet - Page 126
ATMEGA169
Manufacturer Part Number
ATMEGA169
Description
8-bit Microcontroller with 16K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATMEGA169.pdf
(365 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA169P-15AT
Manufacturer:
PANASONIC
Quantity:
301
Part Number:
ATMEGA169P-15AT
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
ATMEGA169P-16AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATMEGA169PA-MU
Manufacturer:
ATMEL
Quantity:
31
Company:
Part Number:
ATMEGA169PAAU
Manufacturer:
INF
Quantity:
4 275
- Current page: 126 of 365
- Download datasheet (4Mb)
Output Compare Unit
126
ATmega169/V
Depending on the mode of operation used, the counter is cleared, incremented, or dec-
remented at each timer clock (clk
clock source, selected by the Clock Select bits (CS22:0). When no clock source is
selected (CS22:0 = 0) the timer is stopped. However, the TCNT2 value can be accessed
by the CPU, regardless of whether clk
priority over) all counter clear or count operations.
The counting sequence is determined by the setting of the WGM21 and WGM20 bits
located in the Timer/Counter Control Register (TCCR2A). There are close connections
between how the counter behaves (counts) and how waveforms are generated on the
Output Compare output OC2A. For more details about advanced counting sequences
and waveform generation, see “Modes of Operation” on page 129.
The Timer/Counter Overflow Flag (TOV2) is set according to the mode of operation
selected by the WGM21:0 bits. TOV2 can be used for generating a CPU interrupt.
The 8-bit comparator continuously compares TCNT2 with the Output Compare Register
(OCR2A). Whenever TCNT2 equals OCR2A, the comparator signals a match. A match
will set the Output Compare Flag (OCF2A) at the next timer clock cycle. If enabled
(OCIE2A = 1), the Output Compare Flag generates an Output Compare interrupt. The
OCF2A Flag is automatically cleared when the interrupt is executed. Alternatively, the
OCF2A Flag can be cleared by software by writing a logical one to its I/O bit location.
The Waveform Generator uses the match signal to generate an output according to
operating mode set by the WGM21:0 bits and Compare Output mode (COM2A1:0) bits.
The max and bottom signals are used by the Waveform Generator for handling the spe-
cial cases of the extreme values in some modes of operation (“Modes of Operation” on
page 129).
Figure 55 shows a block diagram of the Output Compare unit.
Figure 55. Output Compare Unit, Block Diagram
top
bottom
bottom
FOCn
top
Signalizes that TCNT2 has reached maximum value.
Signalizes that TCNT2 has reached minimum value (zero).
OCRnx
T2
Waveform Generator
WGMn1:0
). clk
=
(8-bit Comparator )
DATA BUS
T2
T2
is present or not. A CPU write overrides (has
can be generated from an external or internal
COMnx1:0
TCNTn
OCFnx (Int.Req.)
OCnx
2514P–AVR–07/06
Related parts for ATMEGA169
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Atmel CryptoMemory
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
Atmel CryptoMemory
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
Atmel CryptoMemory, 16Kbit
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontrollers
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontroller with 16/32/64/128K Bytes In-System Programmable Flash
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontroller with 16/32/64K Bytes In-System Programmable Programmable
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet: