ATMEGA32HVB-8X3 Atmel, ATMEGA32HVB-8X3 Datasheet - Page 89

• Manufacturer Part Number: ATMEGA32HVB-8X3
• Description: MCU AVR 32KB FLASH 8MHZ 44TSSOP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32HVB-8X3

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SPI
• Peripherals: POR, WDT
• Number Of I /o: 17
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 25 V
• Data Converters: A/D 7x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TSSOP
• Processor Series: ATMEGA32x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SPI, TWI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRSB200
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 7 Channel
• Package: 44TSSOP
• Device Core: AVR
• Family Name: ATmega
• Maximum Speed: 8 MHz
• Operating Supply Voltage: 5|9|12|15|18|24 V
• For Use With: ATSTK524 - KIT STARTER ATMEGA32M1/MEGA32C1ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

17.7.1
17.7.2
17.8
8042B–AVR–06/10
Timer/Counter Timing Diagrams
Compare Match Blocking by TCNT0 Write
Using the Output Compare Unit
All CPU write operations to the TCNTnH/L Register will block any Compare Match that occur in
the next timer clock cycle, even when the timer is stopped. This feature allows OCRnA/B to be
initialized to the same value as TCNTn without triggering an interrupt when the Timer/Counter
clock is enabled.
Since writing TCNTnH/L will block all Compare Matches for one timer clock cycle, there are risks
involved when changing TCNTnH/L when using the Output Compare Unit, independently of
whether the Timer/Counter is running or not. If the value written to TCNTnH/L equals the
OCRnA/B value, the Compare Match will be missed.
The Timer/Counter is a synchronous design and the timer clock (clk
clock enable signal in the following figures. The figures include information on when Interrupt
Flags are set.
The figure shows the count sequence close to the MAX value.
Figure 17-6. Timer/Counter Timing Diagram, no Prescaling
Figure 17-7 on page 89
Figure 17-7. Timer/Counter Timing Diagram, with Prescaler (f
Figure 17-8 on page 90
TCNTn
TCNTn
(clk
(clk
TOVn
TOVn
clk
clk
clk
clk
I/O
I/O
I/O
Tn
I/O
Tn
/1)
/8)
Figure 17-6 on page 89
shows the same timing data, but with the prescaler enabled.
shows the setting of OCFnA and OCFnB in Normal mode.
MAX - 1
MAX - 1
contains timing data for basic Timer/Counter operation.
MAX
MAX
ATmega16HVB/32HVB
BOTTOM
BOTTOM
clk_I/O
/8)
Tn
) is therefore shown as a
BOTTOM + 1
BOTTOM + 1
89