MAX6966/MAX6967
10-Port Constant-Current LED Drivers and I/O
Expanders with PWM Intensity Control
The MAX6966/MAX6967 are written to using the follow-
ing sequence ( Figure 11):
1) Take SCLK low.
2) Take CS low. This enables the internal 16-bit shift reg-
ister.
3) Clock 16 bits of data into DIN, D15 first to D0 last,
observing the setup and hold times. Bit D15 is low,
indicating a write command.
4) Take CS high (either while SCLK is still high after
clocking in the last data bit, or after taking SCLK
low).
5) Take SCLK low (if not already low).
If fewer or greater than 16 bits are clocked into the
MAX6966/MAX6967 between taking CS low and taking
CS high again, the MAX6966/MAX6967 store the last 16
bits received, including the previous transmission(s).
The general case is when n bits (where n > 16) are
transmitted to the MAX6966/MAX6967. The last bits
comprising bits {n-15} to {n}, are retained, and are par-
allel loaded into the 16-bit latch as bits D15 to D0,
respectively ( Figure 12).
CS
SCLK
Reading Device Registers
Any register data within the MAX6966/MAX6967 can 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 contain the address of the register
to read. Bits D7 to D0 contain dummy data, which is
discarded.
4) Take CS high (either while SCLK is still high after
clocking in the last data bit, or after taking SCLK
low). Positions D7 through D0 in the shift register are
now loaded with the register data addressed by bits
D15 through D8.
5) Take SCLK low (if not already low).
6) Issue another read or write command, and examine
the bit stream at DOUT; the second 8 bits are the
contents of the register addressed by bits D14
through D8 in step 3).
DIN
D15
=0
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
DOUT
Figure 11. 16-Bit Write Transmission to the MAX6966/MAX6967
CS
SCLK
D15 = 0
DIN
DOUT
BIT
1
BIT
2
N-15
N-31
N-14
N-30
N-13
N-29
N-12
N-28
N-11
N-27
N-10
N-26
N-9
N-25
N-8
N-24
N-7
N-23
N-6
N-22
N-5
N-21
N-4
N-20
N-3
N-19
N-2
N-18
N-1
N-17
N
N-16
Figure 12. Transmission of More than 16 Bits to the MAX6966/MAX6967
Maxim Integrated
23
相关PDF资料
MAX6968AAE+ IC LED DRIVER LINEAR 16-SSOP
MAX6970AUE+ IC LED DRIVER LINEAR 16-TSSOP
MAX6971AUG+T IC LED DRIVER LINEAR 24-TSSOP
MAX6974ATL+ IC LED DRIVER LINEAR 40-TQFN
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相关代理商/技术参数
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MAX6967ATE-T 功能描述:LED显示驱动器 10-Port Constant Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube
MAX6968AAE 功能描述:LED显示驱动器 8-Port 5.5V Constant Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube
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MAX6968AAE-T 功能描述:LED显示驱动器 8-Port 5.5V Constant Current LED Driver RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube
MAX6968AEE 制造商:Maxim Integrated Products 功能描述:8-PORT, 5.5V CONSTANT-CURRENT LED DRIVER - Rail/Tube
MAX6968AEE+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube