lan9312 Standard Microsystems Corp., lan9312 Datasheet - Page 173
lan9312
Manufacturer Part Number
lan9312
Description
Lan9312 High Performance Two Port 10/100 Managed Ethernet Switch With 32-bit Non-pci Cpu Interface
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9312.pdf
(458 pages)
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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312
BITS
3:1
4
0
IRQ Polarity (IRQ_POL)
When cleared, this bit enables the IRQ line to function as an active low
output. 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
interrupt is always active low.
0: IRQ active low output
1: IRQ active high output
RESERVED
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:
0: IRQ pin open-drain output
1: IRQ pin push-pull driver
Note 14.1 Register bits designated as NASR are not reset when either the SRST bit in the
When configured as an open-drain output, the IRQ_POL bit is
ignored and the interrupt output is always active low.
Configuration Register (HW_CFG)
Register (RESET_CTL)
DESCRIPTION
DATASHEET
is set.
173
register or the DIGITAL_RST bit in the
Note 14.1
Note 14.1
NASR
NASR
TYPE
R/W
R/W
RO
Revision 1.2 (04-08-08)
Reset Control
DEFAULT
Hardware
0b
0b
-
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