ATMEGA163-8AI Atmel, ATMEGA163-8AI Datasheet - Page 50

• Manufacturer Part Number: ATMEGA163-8AI
• Description: IC AVR MCU 16K A/D 8MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA163-8AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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ATmega163(L)
Figure 35. Effects of Unsynchronized OCR1 Latching.
Figure 36. Effects of Unsynchronized OCR1 Latching in Overflow Mode.
During the time between the write and the latch operation, a read from OCR1A or
OCR1B will read the contents of the temporary location. This means that the most
recently written value always will read out of OCR1A/B.
When the OCR1X contains $0000 or TOP, and the up/down PWM mode is selected, the
output OC1A/OC1B is updated to low or high on the next Compare Match according to
the settings of COM1A1/COM1A0 or COM1B1/COM1B0. This is shown in Table 18. In
overflow PWM mode, the output OC1A/OC1B is held low or high only when the Output
Compare Register contains TOP.
Table 18. PWM Outputs OCR1X = $0000 or TOP
Note:
COM1X1
Note: x = A or B
1. X = A or B
1
1
1
1
Note: X = A or B
Unsynchronized OC1x Latch
Synchronized OC1x Latch
Synchronized OC1x Latch
Unsynchronized OC1x Latch
COM1X0
0
0
1
1
OCR1X
$0000
$0000
TOP
TOP
(1)
PWM Output OC1x
PWM Output OC1x
PWM Output OC1x
PWM Output OC1x
Output OC1X
H
H
L
L
1142E–AVR–02/03