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XR22804 데이터시트(PDF) 39 Page - Exar Corporation

부품명 XR22804
상세설명  Hi-Speed USB to 10/100 Ethernet Bridge with 4 UARTs
PDF  47 Pages
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제조업체  EXAR [Exar Corporation]
홈페이지  http://www.exar.com
Logo EXAR - Exar Corporation

XR22804 데이터시트(HTML) 39 Page - Exar Corporation

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XR22804
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exar.com/XR22804
Rev 1B
EDGE_SET_0 (0x3C2) - Write Only
EDGE_CLEAR_0 (0x3C3) - Write Only
EDGE_STATE_0 (0x3C4) - Read/Write
EDGE_TRI_STATE_0 (0x3C5) - Read/Write
EDGE_OPEN_DRAIN_0 (0x3C6) - Read/Write
Bit
Default
Description
15:0
0x0000
E[15:0]
0: No effect
1: Set IO pin assigned to EDGE function and configured as an output to a logic ‘1’
Bit
Default
Description
15:0
0x0000
E[15:0]
0: No effect
1: Clear IO pin assigned to EDGE function and configured as an output to a logic ‘0’
Bit
Default
Description
15:0
0x0000
E[15:0]
Writing in this register sets or clears the EDGE IO pin(s) configured as an output. Writing to an EDGE pin con-
figured as an input has no effect. Reading this register returns the state of each IO pin configured as an EDGE
pin irrespective of whether it is configured as an input or output. Note that output transitions across multiple IO
pins may be slightly staggered. Refer to EDGE section on page 17.
0: Write clears the corresponding bit to a ‘0’. Read returns the current state.
1: Write sets the corresponding bit to a ‘1’. Read returns the current state.
Bit
Default
Description
15:0
0x0000
E[15:0]
0: IO pin assigned to EDGE function and configured as an output is actively driven
1: IO pin assigned to EDGE function and configured as an output is tri-stated
Bit
Default
Description
15:0
0x0000
E[15:0]
Note that XR22804 open drain outputs have a weak internal pull-up.
0: IO pin assigned to EDGE function and configured as an output is a push-pull output
1: IO pin assigned to EDGE function and configured as an output is an open drain output



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