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參數(shù)資料
| 型號： | LM9830 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | LM9830 36-Bit Color Document Scanner |
| 中文描述： | LM9830 36位彩色文件掃描儀 |
| 文件頁數(shù)： | 36/45頁 |
| 文件大小： | 566K |
| 代理商： | LM9830 |
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An EPP read is shown in Figure 55. The handshaking for the
address cycle of a read is identical to the address cycle for a
write. The data cycle is as follows:
The host takes STROBE high, indicating that the next operation
is a read.
The host tristates D0-D7
The host takes AUTOFEED low to request the first nibble from
the LM9830.
The LM9830 places the first nibble on the ERROR, SELECT,
PE, and ACK pins.
The LM9830 takes BUSY high to indicate the nibble is valid.
The host latches the nibble on or after the rising edge of BUSY.
The host takes AUTOFEED high to request the second nibble
from the LM9830.
The LM9830 places the second nibble on the ERROR,
SELECT, PE, and ACK pins.
The LM9830 takes BUSY low to indicate the nibble is valid.
The host latches the nibble on or after the falling edge of BUSY.
Additional nibble reads will read from the last latched address
(useful for reading pixel data or the DataPort).
7.0 The Microprocessor Compatible Interface
In this interface the part is written to like a standard μP peripheral,
with RD (AUTOFEED), WR (STROBE), CS (INIT), ALE (SELEC-
TIN), and an 8 bit databus (D0-D7). This interface would be used
in a system where another interface (perhaps SCSI or FireWire)
was desired. Using the LM9830 in this application in a DMA
mode is relatively easy and efficient, because large blocks of
image data can easily be read through a series of RDs.
To enter the μP interface mode, the CMODE pin should be tied to
V
D
.
7.1 Writing to the Configuration Register (μP Mode)
The Configuration Register address is latched on the falling edge
of ALE. Data is written to that address on the rising edge of WR.
7.2 Reading From The Configuration Register (μP Mode)
The address is latched as in the previous example. For all modes
except DataPort operations, the LM9830 transmits the data at
that address on the following read. Additional nibble reads will
read from the last latched address (useful for reading pixel data).
7.3 Writing Data to the DataPort (μP Mode)
The DataPort is used to write the gamma table and the off-
set/gain coefficients to the LM9830 in a continuous stream. First,
write to register 3 to set what the data is (gamma or offset/gain)
and what color (red, green, or blue) the data is for. Then write to
registers 4 and 5 to set the initial address (usually 0), and the
R/W mode (W in this example). To write data to the DataPort,
send the Data address (6) to the DataPort followed by a serial
stream of data as shown in Figure 58. The DataPort Address
stored in registers 4 and 5 will be automatically incremented after
every write (if writing gamma data) or every second write (if writ-
ing offset/gain coefficient words).
7.4 Reading Data from the DataPort (μP Mode)
The gamma table and offset/gain coefficients can also be read
STROBE
AUTOFEED
BUSY
Addr
D0 - D7
Figure 55: Reading from the Configuration Register
(Nibble Mode)
SELECT IN
ERROR (D0, D4)
SELECT (D1, D5)
PE (D2, D6)
ACK (D3, D7)
D7-D4
D3-D0
CS (INIT)
RD (AUTO-
FEED)
Addr
D0 - D7
8-Bit Data
WR
(STROBE)
ALE
(SELECTIN)
Figure 56: Writing to the Configuration Register (μP)
CS (INIT)
RD (AUTO-
FEED)
Figure 57: Reading from the Configuration Register
(μP mode, except DataPort)
Addr
D0 - D7
8-Bit Data
WR
(STROBE)
ALE
(SELECTIN)
Figure 58: Writing to the Configuration Register (μP)
Data
n
CS (INIT)
6
D0 - D7
WR
(STROBE)
ALE
(SELECTIN)
RD
(AUTOFEED)
Data
n+1
Data
n+2
D
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM9830VJD | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
| LM9830VJD/NOPB | 功能描述:視頻模擬/數(shù)字化轉(zhuǎn)換器集成電路 RoHS:否 制造商:Texas Instruments 輸入信號類型:Differential 轉(zhuǎn)換器數(shù)量:1 ADC 輸入端數(shù)量:4 轉(zhuǎn)換速率:3 Gbps 分辨率:8 bit 結(jié)構(gòu): 輸入電壓:3.3 V 接口類型:SPI 信噪比: 電壓參考: 電源電壓-最大:3.45 V 電源電壓-最小:3.15 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:TCSP-48 封裝:Reel |
| LM9830VJDX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM9830 36-Bit Color Document Scanner |
| LM9831 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM9831 42-Bit Color, 1200dpi USB Image Scanner |
| LM9831CCVJD | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM9831 42-Bit Color, 1200dpi USB Image Scanner |
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