dp83630sqx National Semiconductor Corporation, dp83630sqx Datasheet - Page 95

• Manufacturer Part Number: dp83630sqx
• Description: Precision Phyter - Ieee 1588 Precision Time Protocol Transceiver
• Manufacturer: National Semiconductor Corporation

15:8
15:0
Bit
7:0
Bit
14.6.7 PTP Receive Configuration Register 1 (PTP_RXCFG1), Page 5
This register provides data and mask fields to filter the first byte in a PTP Message. This function will be disabled if all the mask
bits are set to 0.
14.6.8 PTP Receive Configuration Register 2 (PTP_RXCFG2), Page 5
This register provides for programming an IP address to be used for filtering packets to detect PTP Event Messages. Since the
IPv4 address is 32-bits, to write an IP address, software must write two 16-bit values. The USER_IP_SEL bit in the PTP_RXCFG0
register selects which octects of the IP address are accessible through this register. For example, to write an IP address of
224.0.1.129, software should do the following:
1.
2.
3.
4.
Reading this registerwill return the IP address field selected by USER_IP_SEL.
Set USER_IP_SEL bit in PTP_RXCFG0 register to 0
Write 0xE000 (224.00) to PTP_RXCFG2
Set USER_IP_SEL bit in the PTP_RXCFG0 register to 1
Write 0x0181 (01.129) to PTP_RXCFG2
IP_ADDR_DATA
BYTE0_MASK
BYTE0_DATA
Bit Name
Bit Name
TABLE 69. PTP Receive Configuration Register 1 (PTP_RXCFG1), address 0x1A
TABLE 70. PTP Receive Configuration Register 2 (PTP_RXCFG2), address 0x1B
0000 0000 0000
0000 0000, RW
0000 0000, RW
0000, RW
Default
Default
Byte0 Data:
Bit mask to be used for matching Byte0 of the Receive PTP Message. A one in
any bit enables matching for the associated data bit. If no matching is required,
all bits of the mask should be set to 0.
Byte0 Mask:
Data to be used for matching Byte0 of the Receive PTP Message.
Receive IP Address Data:
16-bits of the IP Address field to be read or written. The USER_IP_SEL bit in the
PTP_RXCFG0 Register selects the portion of the IP address is to be read or
written.
95
Description
Description
www.national.com