ATMEGA169V-8MI SL709 Atmel, ATMEGA169V-8MI SL709 Datasheet - Page 218
ATMEGA169V-8MI SL709
Manufacturer Part Number
ATMEGA169V-8MI SL709
Description
IC AVR MCU 16K 8MHZ 1.8V 64QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169V-8MI SL709
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
Contains lead / RoHS non-compliant
Other names
ATMEGA169V8MSL709
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Disabling the LCD
218
ATmega169/V
In the example below we assume SEG10 and COM1 and SEG4 in COM0 are the only
segments changed from frame to frame. Data are stored in r20 and r21 for simplicity
Note:
In some application it may be necessary to disable the LCD. This is the case if the MCU
enters Power-down mode where no clock source is present.
The LCD should be completely discharged before being disabled. No DC voltage should
be left across any segment. The best way to achieve this is to use the LCD Blanking fea-
ture that drives all segment pins and common pins to GND.
When the LCD is disabled, port function is activated again. Therefore, the user must
check that port pins connected to a LCD terminal are either tri-state or output low (sink).
Assembly Code Example
C Code Example
LCD_update:
Void LCD_update(unsigned char data1, data2);
{
}
; LCD Blanking and Low power waveform are unchanged.
; Update Display memory.
sts
sts
ret
/* LCD Blanking and Low power waveform are unchanged. */
/* Update Display memory. */
LCDDR0 = data1;
LCDDR6 = data2;
1. See “About Code Examples” on page 6.
LCDDR0, r20
LCDDR6, r21
(1)
(1)
2514P–AVR–07/06
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