参数资料
型号: AT89C51SND2C-7FTUL
厂商: Atmel
文件页数: 81/160页
文件大小: 0K
描述: IC 8051 MCU FLASH 64K MP3 100BGA
标准包装: 260
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: I²C,IDE/ATAPI,MMC,SPI,UART/USART,USB
外围设备: 音频,I²S,MP3,PCM,POR,WDT
输入/输出数: 32
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
RAM 容量: 2.25K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.3 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 100-TFBGA
包装: 托盘
其它名称: AT89C51SND2C7FTUL
7-22
DS785UM1
Copyright 2007 Cirrus Logic
Raster Engine With Analog/LCD Integrated Timing and Interface
EP93xx User’s Guide
7
Assuming the 3 bit input pattern that represents this 50% duty cycle grayscale is 0x3 (or
011b), the values in Table 7-7 should be used to program this pattern into the grayscale look-
up-table.
Since all patterns must be evaluated against their specific use, no more examples for half
intensity will be offered. Instead, another example will be used to make a walking distortion
more obvious.
Take the example of a one-third luminous intensity grayscale pattern. Assume a 3Hx3Vx3F
matrix for this definition. Wanting the intensity to be evenly distributed and given the three
frame interval, any cell in the matrix should only be active for one frame. The matrix could be
filled in as in Figure 7-6.
Figure 7-6. Programming for One-third Luminous Intensity
Table 7-7. Programming 50% Duty Cycle Into Lookup Table
Frame
Vert
Horz
VCNT (lines)
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
GrySclLUT
Address *4
Ctr
HCNT
(pixels)
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Frame
Pixel
D18
D17
D16
Register
Address
D
1
5
D
1
4
D
1
3
D
1
2
D
1
D
1
0
D
9
D
8
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Value
1
base + 0x0C
01
011
10
00
101
00
11
00
011
base + 0x2C
10
100
01
11
010
11
00
01
011
base + 0x4C
11
000
10
011
01
10
011
base + 0x6C
00
111
01
100
10
11
011
Frame 0
H O R Z
Frame 1
V
100
010
E
010
001
R
001
100
T
Frame 2
001
100
010
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