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LAN9250 bảng dữ liệu(PDF) 68 Page - Microchip Technology

tên linh kiện LAN9250
Giải thích chi tiết về linh kiện  Integrated Ethernet PHY with HP Auto-MDIX
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nhà sản xuất  MICROCHIP [Microchip Technology]
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LAN9250 bảng dữ liệu(HTML) 68 Page - Microchip Technology

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LAN9250
DS00001913A-page 68
 2015 Microchip Technology Inc.
Note 1:
Register bits designated as NASR are not reset when the DIGITAL_RST bit in the Reset Control Register
(RESET_CTL) is set.
4
IRQ Polarity (IRQ_POL)
When cleared, this bit enables the IRQ line to function as an active low out-
put. When set, the IRQ output is active high. When the IRQ is configured as
an open-drain output (via the IRQ_TYPE bit), this bit is ignored and the inter-
rupt is always active low.
0: IRQ active low output
1: IRQ active high output
R/W
NASR
Note 1
0b
3:2
RESERVED
RO
-
1
IRQ Clock Select (IRQ_CLK_SELECT)
When this bit is set, the crystal clock may be output on the IRQ pin. This is
intended to be used for system debug purposes in order to observe the clock
and not for any functional purpose.
Note:
When using this bit, the IRQ pin should be set to a push-pull driver.
R/W
0b
0
IRQ Buffer Type (IRQ_TYPE)
When this bit is cleared, the IRQ pin functions as an open-drain output for
use in a wired-or interrupt configuration. When set, the IRQ is a push-pull
driver.
Note:
When configured as an open-drain output, the IRQ_POL bit is
ignored and the interrupt output is always active low.
0: IRQ pin open-drain output
1: IRQ pin push-pull driver
R/W
NASR
Note 1
0b
Bits
Description
Type
Default



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