High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
BITS
DESCRIPTION
Lock Enable GPIO 8 (LOCK_GPIO_8)
TYPE
DEFAULT
5
R/W
1b
This bit enables/disables the GPIO 8 lock. This lock prevents a 1588 capture
from overwriting the Clock value if the 1588_GPIO8 interrupt in the 1588
Interrupt Status and Enable Register (1588_INT_STS_EN) is already set
due to a previous capture.
0: Disables GPIO 8 Lock
1: Enables GPIO 8 Lock
4:3
2:1
0
GPIO 9 Clock Event Mode (GPIO_EVENT_9)
These bits determine the output on GPIO 9 when a clock target compare
event occurs.
R/W
R/W
R/W
00b
00b
0b
00: 100ns pulse output
01: Toggle output
10: 1588_TIMER_INT bit value in the 1588_INT_STS_EN register output
11: RESERVED
Note:
The 1588_GPIO_OE[9] bit in the General Purpose I/O
Configuration Register (GPIO_CFG) must be set in order for the
GPIO output to be controlled by the 1588 block.
Note:
The polarity of the pulse or level is set by the
GPIO_EVENT_POL_9 bit in the General Purpose I/O Configuration
Register (GPIO_CFG). The GPIOBUF[9] bit still determines the
GPIO buffer type.
GPIO 8 Clock Event Mode (GPIO_EVENT_8)
These bits determine the output on GPIO 8 when a clock target compare
event occurs.
00: 100ns pulse output
01: Toggle output
10: 1588_TIMER_INT bit value in the 1588_INT_STS_EN register output
11: RESERVED
Note:
The 1588_GPIO_OE[8] bit in the General Purpose I/O
Configuration Register (GPIO_CFG) must be set in order for the
GPIO output to be controlled by the 1588 block.
Note:
The polarity of the pulse or level is set by the
GPIO_EVENT_POL_8 bit in the General Purpose I/O Configuration
Register (GPIO_CFG). The GPIOBUF[8] bit still determines the
GPIO buffer type.
Reload/Add (RELOAD_ADD)
This bit determines the course of action when a clock target compare event
occurs. When set, the 1588 Clock Target High-DWORD Register
(1588_CLOCK_TARGET_HI) and 1588 Clock Target Low-DWORD Register
(1588_CLOCK_TARGET_LO) are loaded from the 1588 Clock Target
Reload High-DWORD Register (1588_CLOCK_TARGET_RELOAD_HI) and
1588 Clock Target Reload/Add Low-DWORD Register
(1588_CLOCK_TARGET_RELOAD_LO) when a clock target compare event
occurs. When low, the Clock Target Low and High Registers are
incremented by the Clock Target Reload Low Register when a clock target
compare event occurs.
0: Reload upon a clock target compare event
1: Increment upon a clock target compare event
SMSC LAN9312
225
Revision 1.2 (04-08-08)
DATASHEET
SMSC [ SMSC CORPORATION ]
