LAN9353 Datasheet, PDF (421/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
Bits
Description
11 GPIO 1588 Timer Interrupt A Clear Enable
(GPIO_1588_TIMER_INT_A_CLEAR_EN)
This bit enables the selected GPIO to clear the 1588 Timer Interrupt A
(1588_TIMER_INT_A) bit of the 1588 Interrupt Status Register
(1588_INT_STS).
The GPIO input is selected using the GPIO 1588 Timer Interrupt A Clear
Select (GPIO_1588_TIMER_INT_A_CLEAR_SEL[2:0]) bits in this register.
The polarity of the GPIO input is determined by GPIO Interrupt/1588 Polarity
7-0 (GPIO_POL[7:0]) in the General Purpose I/O Configuration Register
(GPIO_CFG).
Note:
The GPIO must be configured as an input for this function to
operate. For the clear function, GPIO inputs are edge sensitive and
must be active for greater than 40 ns to be recognized.
10:8 GPIO 1588 Timer Interrupt A Clear Select
(GPIO_1588_TIMER_INT_A_CLEAR_SEL[2:0])
These bits determine which GPIO is used to clear the 1588_TIMER_INT_A
bit of the 1588 Interrupt Status Register (1588_INT_STS).
Note: The IEEE 1588 Unit supports 8 GPIO signals.
7:6 RESERVED
5:4 Clock Event Channel B Mode (CLOCK_EVENT_B)
These bits determine the output on Clock Event Channel B when a Clock Tar-
get compare event occurs.
00: 100ns pulse output
01: Toggle output
10: 1588_TIMER_INT_B bit value in 1588_INT_STS_EN register output
11: RESERVED
Note:
The General Purpose I/O Configuration Register (GPIO_CFG) is
used to enable the clock event onto the GPIO pins as well as to
set the polarity and output buffer type.
3:2 Clock Event Channel A Mode (CLOCK_EVENT_A)
These bits determine the output on Clock Event Channel A when a Clock Tar-
get compare event occurs.
00: 100ns pulse output
01: Toggle output
10: 1588_TIMER_INT_A bit value in 1588_INT_STS_EN register output
11: RESERVED
Note:
The General Purpose I/O Configuration Register (GPIO_CFG) is
used to enable the clock event onto the GPIO pins as well as to
set the polarity and output buffer type.
Type
R/W
R/W
RO
R/W
R/W
Default
0b
000b
-
00b
00b
 2015 Microchip Technology Inc.
DS00001925A-page 421