ATMEGA169-16MI Atmel, ATMEGA169-16MI Datasheet - Page 19
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ATMEGA169-16MI
Manufacturer Part Number
ATMEGA169-16MI
Description
IC AVR MCU 16K 16MHZ IND 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169-16MI
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
54
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)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-MLF®, 64-QFN
For Use With
ATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
ATmega169 Rev B
2514PS–AVR–07/06
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8. Interrupts may be lost when writing the timer registers in the asynchronous
7. Internal Oscillator Runs at 4 MHz
6. LCD Contrast Voltage is not Correct
5. External Oscillator is Non-functional
Interrupts may be lost when writing the timer registers in the asynchronous timer
Internal Oscillator Runs at 4 MHz
LCD Contrast Voltage is not Correct
External Oscillator is Non-functional
USART
ADC Measures with Lower Accuracy than Specified
Serial Downloading
IDCODE masks data from TDI input
Problem Fix / Workaround
–
–
–
timer
If one of the timer registers which is synchronized to the asynchronous timer2 clock
is written in the cycle before a overflow interrupt occurs, the interrupt may be lost.
Problem Fix/Workaround
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the
value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare
Register, OCR2.
The Internal Oscillator runs at 4 MHz instead of the specified 8 MHz. Therefore, all
Flash/EEPROM programming times are twice as long as specified. This includes
Chip Erase, Byte programming, Page programming, Fuse programming, Lock bit
programming, EEPROM write from the CPU, and Flash Self-Programming.
For this reason, rev-B samples are shipped with the CKDIV8 Fuse unprogrammed.
Problem Fix/Workaround
If 8 MHz operation is required, apply an external clock (this will be fixed in rev. C).
The LCD contrast voltage between 1.8V and 3.1V is incorrect. When the V
between 1.8V and 3.1V, the LCD contrast voltage drops approx. 0.5V. The current
consumption in this interval is higher than expected.
Problem Fix/Workaround
Contrast will be wrong, but display will still be readable, can be partly compensated
for using the contrast control register (this will be fixed in rev. C).
The external oscillator does not run with the setup described in the datasheet.
Problem Fix/Workaround
Use other clock source (this will be fixed in rev. C).
If ATmega169 is the only device in the scan chain, the problem is not visible.
Select the Device ID Register of the ATmega169 by issuing the IDCODE
instruction or by entering the Test-Logic-Reset state of the TAP controller to
read out the contents of its Device ID Register and possibly data from
succeeding devices of the scan chain. Issue the BYPASS instruction to the
ATmega169 while reading the Device ID Registers of preceding devices of
the boundary scan chain.
If the Device IDs of all devices in the boundary scan chain must be captured
simultaneously, the ATmega169 must be the first device in the chain.
ATmega169/V
CC
19
is