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BU16501KS2 Datenblatt(PDF) 8 Page - Rohm

Teilenummer BU16501KS2
Bauteilbeschribung  LED Driver with I2C Compatible and 3-wire Serial Interface for 8횞16 LEDs in Dot Matrix
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Hersteller  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BU16501KS2 Datenblatt(HTML) 8 Page - Rohm

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Datasheet
Datasheet
BU16501KS2
© 2013 ROHM Co., Ltd. All rights reserved.
www.rohm.com
TSZ22111・15・001
TSZ02201-0G3G0CZ00250-1-2
01.Oct.2013 Rev.001
Serial Interface
1. SPI format
・When IFMODE is set to “H”, it can interface with SPI format.
・The serial interface is four terminals (serial clock terminal (SCL), serial data input terminal (SDA), and chip selection
input terminal (CE)).
(1)Write operation
・ Data is taken into an internal shift register with rising edge of SCL. (Max of the frequency is 13MHz.)
・ The receive data becomes enable in the “H" section of CE. (Active “H".)
・ The transmit data is forwarded (with MSB-First) in the order of write command “0”(1bit), the control register address
(7bit) and data (8bit).
Figure 2.
Writing format
(2)Timing diagram
Figure 3.
Timing diagram (SPI format)
2. I
2C BUS format
When IFMODE is set to “L”, it can interface with I
2C BUS format.
(1) Slave address
CE
A7
A6
A5
A4
A3
A2
A1
R/W
L
1
1
1
0
1
0
0
0
H
1
1
1
0
1
0
1
(2) Bit Transfer
SCL transfers 1-bit data during H. During H of SCL, SDA cannot be changed at the time of bit transfer. If SDA
changes while SCL is H, START conditions or STOP conditions will occur and it will be interpreted as a control signal.
SDA
SCL
SDA a state of stability
Data are effective
SDA
It can change
Figure 4.
Bit transfer (I
2C format)
CE
SCL
SDA
W
A6
A5
A4
A3
A2
A1
A0
D4
D3
D2
D1
D0
D7
D6
D5
twlc
CE
SCL
SDA
tcsw
twhc
tcss
tscyc
tss
tsh
tcgh


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