参数资料
型号: AT89C51SND2C-7FTUL
厂商: Atmel
文件页数: 83/160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
7-24
DS785UM1
Copyright 2007 Cirrus Logic
Raster Engine With Analog/LCD Integrated Timing and Interface
EP93xx User’s Guide
7
Figure 7-8. Three and Four Count Axis
Assuming that the 3-bit input pattern that represents this 33% duty cycle grayscale is 0x2 or
010b, the values in Table 7-9 are used to program this pattern into the grayscale look-up-
table. In this mode, the X locations are ignored by the grayscale generation.
7.4.9 Hardware Cursor
The raster engine provides support for a hardware cursor. The hardware cursor has a
separate bus mastering interface that allows it’s image to be stored anywhere in memory.
Software provides a location start, reset, size, X and Y position, and two cursor colors. The
hardware loads a line at a time from memory and multiplexes the video stream data based on
the cursor values. The X and Y locations are compared to the horizontal and vertical counters
and trigger the state machine to enable the cursor output overlay.
Frame 0
H O R Z
Frame 1
V
1000
0100
E
0011
0100
R
0100
0011
T
Frame 2
0011
1001
1000
Table 7-9. Programming 33% Duty Cycle into the 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
0
base + 0x08
X
0
1
0
1
0
1
00
010
base + 0x28
X
1
0
1
0
1
0
01
010
base + 0x48
X
0
1
0
1
0
10
010
base + 0x68
X
11
010
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