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BU1850MUV 데이터시트(PDF) 9 Page - Rohm

부품명 BU1850MUV
상세설명  GPIO Expander IC
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제조업체  ROHM [Rohm]
홈페이지  http://www.rohm.com
Logo ROHM - Rohm

BU1850MUV 데이터시트(HTML) 9 Page - Rohm

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Technical Note
9/17
BU1850MUV
www.rohm.com
2009.09 - Rev.A
© 2009 ROHM Co., Ltd. All rights reserved.
3.
Register configuration
The address is increased one by one when data is continuously written.
When the final address is set to 13h, then the next address 00h will be written.
By making XRST “Low”, the setting register value will be initialed shown in following register map.
3-1 Register map
Addr
Init
Type
D7
D6
D5
D4
D3
D2
D1
D0
00h
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
01h
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
02h
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
03h
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
04h
00h
R/W
RESET
reserved
reserved
reserved
reserved
reserved
reserved
reserved
05h
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
06h
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
07h
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
08h
00h
R/W
INTEN7
INTEN6
INTEN5
INTEN4
INTEN3
INTEN2
INTEN1
INTEN0
09h
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
0Ah
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
0Bh
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
0Ch
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
0Dh
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
0Eh
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
0Fh
-
-
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
10h
00h
R
GPI7
GPI6
GPI5
GPI4
GPI3
GPI2
GPI1
GPI0
11h
00h
R/W
GPO7
GPO6
GPO5
GPO4
GPO3
GPO2
GPO1
GPO0
12h
00h
R/W
WRSEL7
WRSEL6
WRSEL5
WRSEL4
WRSEL3
WRSEL2
WRSEL1
WRSEL0
13h
00h
R/W
XPD7
XPD6
XPD5
XPD4
XPD3
XPD2
XPD1
XPD0
Do not write reserved resisters excluding "0". 10h address register is disregarded even if it is written.
3-2
Resister function
n is the number of GPIO[7:0] ports.
Symbol
Addr
Description
RESET
04h
The register is returned to an initial value by writing "1". This register value is returned to "0".
GPIn register is not initialized.
INTENn
08h
Interrupt of GPIOn port is enabled by "1". It is masked by "0".
GPIn
10h
Read GPIOn port. Writing is disregarded.
GPOn
11h
Output value of GPIOn port.
WRSELn
12h
GPIOn port is input by "0" and output by "1".
XPDn
13h
Pull-down of GPIOn port is on by "0" and off by "1". GPIOn should be input.


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