ATMEGA169V-1MC Atmel, ATMEGA169V-1MC Datasheet - Page 223
ATMEGA169V-1MC
Manufacturer Part Number
ATMEGA169V-1MC
Description
IC MCU AVR 16K 1.8V 1MHZ 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169V-1MC
Core Processor
AVR
Core Size
8-Bit
Speed
1MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
53
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
0°C ~ 70°C
Package / Case
64-MLF®, 64-QFN
For Use With
ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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2514H–AVR–05/03
• 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:
This is a very flexible scheme, and users are encouraged to calculate their own table to
investigate the possible frame rates from the formula above. Note when using 1/3 duty
the frame rate is increased with 33% when Frame Rate Register is constant. Example of
frame rate calculation is shown in Table 98.
Table 98. Example of frame rate calculation
LCDCD2
ckl
4 MHz
4 MHz
32.768 kHz
32.768 kHz
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.
LCD
0
0
0
0
1
1
1
1
LCDCD1
duty
1/4
1/3
Static
1/2
0
0
1
1
0
0
1
1
K
8
6
8
8
LCDCD0
LCDPS2:0
6
6
0
0
0
1
0
1
0
1
0
1
f
frame
Output from
Divided by:
Prescaler
=
---------------------------------------------------------
N
2048
2048
16
16
K N
1
2
3
4
5
6
7
8
LCDCS2:0
3
3
0
4
f
1
c lk
+
LCD
clk
LCDCD
LCD
= 1/4, gives a frame rate of:
= 32.768 kHz, N = 16, and Duty
ATmega169V/L
Frame Rate
4000000/(8*2048*(1+3)) =
61 Hz
4000000/(6*2048*(1+3)) =
81 Hz
32768/(8*16*(1+0)) = 256 Hz
32768/(8*16*(1+4)) = 51 Hz
85.3 Hz
51.2 Hz
42.7 Hz
36.6 Hz
256 Hz
128 Hz
64 Hz
32 Hz
223
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