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ATmega169P датащи(PDF) 247 Page - ATMEL Corporation

номер детали ATmega169P
подробное описание детали  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  393 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega169P датащи(HTML) 247 Page - ATMEL Corporation

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247
8018N–AVR–08/09
ATmega169P
23.5.3
LCDFRR – LCD Frame Rate Register
• Bit 7 – Res: Reserved Bit
This bit is reserved and will always read as zero.
• Bits 6:4 – LCDPS2:0: LCD Prescaler Select
The LCDPS2:0 bits selects tap point from a prescaler. The prescaled output can be further
divided by setting the clock divide bits (LCDCD2:0). The different selections are shown in Table
23-4 on page 247. Together they determine the prescaled LCD clock (clk
LCD_PS), which is clock-
ing the LCD module.
Table 23-3.
LCD Port Mask
LCDPM2
LCDPM1
LCDPM0
I/O Port in Use as Segment
Driver
Maximum Number of
Segments
0
0
0
SEG0:12
13
0
0
1
SEG0:14
15
0
1
0
SEG0:16
17
0
1
1
SEG0:18
19
1
0
0
SEG0:20
21
1
0
1
SEG0:22
23
1
1
0
SEG0:23
24
1
1
1
SEG0:24
25
Bit
7
654
3
2
1
0
(0xE6)
–
LCDPS2
LCDPS1
LCDPS0
–
LCDCD2
LCDCD1
LCDCD0
LCDFRR
Read/Write
R
R/W
R/W
R/W
R
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Table 23-4.
LCD Prescaler Select
LCDPS2
LCDPS1
LCDPS0
Output from
Prescaler
clk
LCD/N
Applied Prescaled LCD Clock Frequency
when LCDCD2:0 = 0, Duty = 1/4, and
Frame Rate = 64 Hz
000
clk
LCD/16
8.1 kHz
001
clkLCD/64
33 kHz
010
clk
LCD/128
66 kHz
011
clk
LCD/256
130 kHz
100
clkLCD/512
260 kHz
101
clk
LCD/1024
520 kHz
110
clk
LCD/2048
1 MHz
111
clkLCD/4096
2 MHz



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