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LAN89730 датащи(PDF) 34 Page - Microchip Technology

номер детали LAN89730
подробное описание детали  Implements Reduced Power Operating Modes
PDF  218 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN89730 датащи(HTML) 34 Page - Microchip Technology

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LAN89730
DS60001348A-page 34
 2013-2015 Microchip Technology Inc.
4.3.1.3
Endpoint 3 (Interrupt)
The Interrupt Endpoint is responsible for indicating device status at each polling interval. The Interrupt Endpoint is imple-
mented via the CTL module. When the Endpoint is accessed, the Interrupt packet specified in Table 4-2 is presented to
the host.
If there is no interrupt status to report, the device responds with a NACK.
The interrupt status can be cleared by writing to Interrupt Status Register (INT_STS).
4.3.1.4
Endpoint 0 (Control)
The Control Endpoint is handled by the CTL (USB Control) module. The CTL module is responsible for handling USB
standard commands, as well as USB vendor commands. In order to support these commands, the CTL must compile
a variety of statistics and store the programmable portions of the USB descriptors. The supported USB commands can
be found in Section 4.3.2, "USB Standard Commands".
TABLE 4-2:
INTERRUPT PACKET FORMAT
Bits
Description
31:20
RESERVED
19
MACRTO_INT
18
RX FIFO Has Frame. The RX FIFO has at least one complete Ethernet frame.
17
TXSTOP_INT
16
RXSTOP_INT
15
PHY_INT
14
TXE
13
TDFU
12
TDFO
11
RXDF_INT
10:0
GPIO_INT
Note:
The polling interval is static and set through the EEPROM. The host can change the polling interval by
updating the contents of the EEPROM and resetting the part.



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