ATMEGA103-6AI Atmel, ATMEGA103-6AI Datasheet - Page 44

IC MCU 128K 6MHZ A/D IT 64TQFP

ATMEGA103-6AI

Manufacturer Part Number
ATMEGA103-6AI
Description
IC MCU 128K 6MHZ A/D IT 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA103-6AI

Core Processor
AVR
Core Size
8-Bit
Speed
6MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K 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
64-TQFP, 64-VQFP
For Use With
ATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Asynchronous Status
Register – ASSR
44
ATmega103(L)
Figure 32. Effects on Unsynchronized OCR Latching
During the time between the write and the latch operation, a read from OCR0 or OCR2
will read the contents of the temporary location. This means that the most recently writ-
ten value always will read out of OCR0/2.
When the OCR Register (not the temporary register) is updated to $00 or $FF, the PWM
output changes to low or high immediately according to the settings of COM21/COM20
or COM11/COM10. This is shown in Table 14.
Table 14. PWM Outputs OCRn = $00 or $FF
Note:
In PWM mode, the Timer Overflow Flag, TOV0 or TOV2, is set when the counter
advances from $00. Timer Overflow Interrupts 0 and 2 operate exactly as in normal
Timer/Counter mode, i.e., it is executed when TOV0 or TOV2 is set, provided that Timer
Overflow interrupt and Global Interrupts are enabled. This also applies to the Timer Out-
put Compare Flags and interrupts.
The frequency of the PWM will be Timer Clock Frequency divided by 510.
• Bits 7..4 – Res: Reserved Bits
These bits are reserved bits in the ATmega103(L) and always read as zero.
Bit
$30 ($50)
Read/Write
Initial Value
COMn1
n = 0 or 2
1
1
1
1
Compare Value changes
R
7
0
Compare Value changes
Unsynchronized OCR Latch
R
6
0
Synchronized OCR Latch
COMn0
0
0
1
1
R
5
0
R
4
0
OCRn
R/W
AS0
$FF
$FF
$00
$00
3
0
TCN0UB
R
2
0
Glitch
OCR0UB
R
1
0
Output PWMn
Counter Value
Compare Value
PWM Output
Counter Value
Compare Value
PWM Output
TCR0UB
H
H
L
L
R
0
0
0945I–AVR–02/07
ASSR

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