ATMEGA169V-8MU Atmel, ATMEGA169V-8MU Datasheet - Page 222
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ATMEGA169V-8MU
Manufacturer Part Number
ATMEGA169V-8MU
Description
IC AVR MCU 16K 8MHZ 1.8V 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169V-8MU
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
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)
1.8 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
Lead free / RoHS Compliant
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ATmega169/V
Table 96. LCD Prescaler Select
• Bit 3 – Res: Reserved Bit
This bit is reserved bit in the ATmega169 and will always read as zero.
• Bits 2:0 – LCDCD2:0: LCD Clock Divide 2, 1, and 0
The LCDCD2:0 bits determine division ratio in the clock divider. The various selections
are shown in Table 97. This Clock Divider gives extra flexibility in frame rate selection.
Table 97. LCD Clock Divide
The frame frequency can be calculated by the following equation:
Where:
LCDCD2
LCDPS2
N = prescaler divider (16, 64, 128, 256, 512, 1024, 2048, or 4096).
K = 8 for duty = 1/4, 1/2, and static.
K = 6 for duty = 1/3.
D = Division factor (see Table 97).
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
LCDCD1
LCDPS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
LCDCD0
LCDPS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Prescaler divided by
Output from
clk
clk
clk
f
Prescaler
clk
clk
clk
frame
clk
clk
clk
LCD
LCD
LCD
LCD
LCD
LCD
Output from
LCD
LCD
LCD
/1024
/2048
/4096
/128
/256
/512
/16
/64
=
/N
(D):
1
2
3
4
5
6
7
8
------------------------- -
(
K N D
f
clk
⋅
LCD
⋅
Duty = 1/4, and Frame Rate = 64 Hz
Frequency when LCDCD2:0 = 0,
Applied Prescaled LCD Clock
)
and Duty = 1/4, gives a frame
clk
LCD
130 kHz
260 kHz
520 kHz
8.1 kHz
66 kHz
33 kHz
1 MHz
2 MHz
= 32.768 kHz, N = 16,
rate of:
85.3 Hz
51.2 Hz
42.7 Hz
36.6 Hz
256 Hz
128 Hz
64 Hz
32 Hz
2514P–AVR–07/06
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