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參數(shù)資料
| 型號(hào)： | MAX6957ANI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | 4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port LED Display Driver and I/O Expander |
| 中文描述： | LED DISPLAY DRIVER, PDIP28 |
| 封裝： | DIP-28 |
| 文件頁數(shù)： | 9/23頁 |
| 文件大?。?/td> | 333K |
| 代理商： | MAX6957ANI |
to multiple MAX6957s, all devices are accessed at the
same time. An access requires (16
n) clock cycles,
where n is the number of MAX6957s connected togeth-
er. To update just one device in a daisy-chain, the user
can send the No-Op command (0x00) to the others.
Writing Device Registers
The MAX6957 contains a 16-bit shift register into which
DIN data are clocked on the rising edge of SCLK, when
CS
is low. When
CS
is high, transitions on SCLK have
no effect. When
CS
goes high, the 16 bits in the Shift
register are parallel loaded into a 16-bit latch. The 16
bits in the latch are then decoded and executed.
The MAX6957 is written to using the following
sequence:
1) Take SCLK low.
2) Take
CS
low. This enables the internal 16-bit shift
register.
3) Clock 16 bits of data into DIN
—
D15 first, D0 last
—
observing the setup and hold times (bit D15 is low,
indicating a write command).
4) Take
CS
high (while SCLK is still high after clocking
in the last data bit).
5) Take SCLK low.
Figure 5 shows a write operation when 16 bits are
transmitted.
It is acceptable to clock more than 16 bits into the
MAX6957 between taking
CS
low and taking
CS
high
again. In this case, only the last 16 bits clocked into the
MAX6957 are retained.
Reading Device Registers
Any register data within the MAX6957 may be read by
sending a logic high to bit D15. The sequence is:
1) Take SCLK low.
2) Take
CS
low (this enables the internal 16-bit shift
register).
3) Clock 16 bits of data into DIN
—
D15 first to D0 last.
D15 is high, indicating a read command and bits
D14 through D8 containing the address of the reg-
ister to be read. Bits D7
–
D0 contain dummy data,
which is discarded.
M
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
28-Port LED Display Driver and I/O Expander
_______________________________________________________________________________________
9
MICROCONTROLLER
SERIAL DATA INPUT
SERIAL DATA OUTPUT
SERIAL CLOCK OUTPUT
DIN
SCLK
CS
DOUT
DIN
SCLK
CS
DOUT
DIN
SCLK
CS
DOUT
SERIAL CS OUTPUT
MAX6957
MAX6957
MAX6957
Figure 4. Daisy-Chain Arrangement for Controlling Multiple MAX6957s
.
D15
= 0
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
D15 = 0
CS
SCLK
DIN
DOUT
Figure 5. 16-Bit Write Transmission to the MAX6957
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6957ANI+ | 功能描述:LED顯示驅(qū)動(dòng)器 2.5-5.5V 20/28Port LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| MAX6957APL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX6957ATL | 功能描述:LED顯示驅(qū)動(dòng)器 RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| MAX6957ATL+ | 功能描述:LED顯示驅(qū)動(dòng)器 2.5-5.5V 20/28Port LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| MAX6957ATL+T | 功能描述:LED顯示驅(qū)動(dòng)器 2.5-5.5V 20/28Port LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
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