ATMEGA169L-8MI Atmel, ATMEGA169L-8MI Datasheet - Page 221

• Manufacturer Part Number: ATMEGA169L-8MI
• Description: IC MCU AVR 16K LV 8MHZ IND 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA169L-8MI

• 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: 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): 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: ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: ATMEGA169L-4MI; ATMEGA169L-4MI

LCD Control and Status
Register B – LCDCRB
2514H–AVR–05/03
• Bit 7 – LCDCS: LCD Clock Select
When this bit is written to zero, the system clock is used. When this bit is written to one,
the external asynchronous clock source is used. The asynchronous clock source is
either Timer/Counter Oscillator or external clock, depending on EXCLK in ASSR. See
“Asynchronous operation of the Timer/Counter” on page 138 for futher details.
• Bit 6 – LCD2B: LCD 1/2 Bias Select
When this bit is written to zero, 1/3 bias is used. When this bit is written to one, ½ bias is
used. Refer to the LCD Manufacture for recommended bias selection.
• Bit 5:4 – LCDMUX1:0: LCD Mux Select
The LCDMUX1:0 bits determine the duty cycle. Common pins that are not used are ordi-
nary port pins. The different duty selections are shown in Table 94.
Table 94. LCD Duty Select
Note:
• Bit 3 – Res: Reserved Bit
This bit is reserved bit in the ATmega169 and will always read as zero.
Bit
Read/Write
Initial Value
LCDMUX1
0
0
1
1
1. 1/2 bias when LCD2B is written to one and 1/3 otherwise.
LCDCS
R/W
7
0
LCDMUX0
LCD2B
R/W
6
0
0
1
0
1
LCDMUX1
R/W
5
0
Static
Duty
1/2
1/3
1/4
LCDMUX0
R/W
4
0
1/2 or 1/3
1/2 or 1/3
1/2 or 1/3
Static
Bias
3
R
0
–
(1)
(1)
(1)
LCDPM2
R/W
2
0
ATmega169V/L
COM Pin
COM0:1
COM0:2
COM0:3
COM0
LCDPM1
R/W
1
0
LCDPM0
I/O Port Pin
R/W
0
0
COM1:3
COM2:3
COM3
None
LCDCRB
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