TNETX15AEPGE Datasheet, PDF (31/79 Pages) Texas Instruments – ADDRESS-LOOKUP DEVICE

aged-address port assignment, agedport at 0x46 (DIO), byte 2
BIT
7
6
5
4
3
Reserved
Initial values after reset
0
0
0
0
0
TNETX15AE
ADDRESS-LOOKUP DEVICE
SPWS041A – AUGUST 1997 – REVISED OCTOBER 1997
2
1
0
PORTCODE
0
0
0
BIT
NAME
FUNCTION
7–4 Reserved Writes to this location are ignored and read as 0.
3–0
PORTCODE
Agednode port assignment. PORTCODE displays the assigned port for the aged-out address contained in the
agednode register.
management add/edit address interface group at 0x2C and 0x38–0x3F (DIO)
BYTE 3
BYTE 2
BYTE 1
BYTE 0
Adddelcontrol
Addnode23–Addnode16 Addnode31–Addnode24
Addport
Addnode39–Addnode32
Addnode7–Addnode0
Addnode47–Addnode40
Addnode15–Addnode8
DIO
ADDRESS
0x2C
0x30
0x34
0x38
0x3C
The management add/edit address registers are used with the ADD bit in the adddelcontrol register to perform
CPU adds and edits to the lookup table. These registers are normally readable/writeable. As long as the ADD
bit in the addelcontrol register is high, writes to these bytes are ignored.
lookup table add/delete command register, adddelcontrol at 0x2C (DIO), byte 0
BYTE 0
BIT
7
6
5
4
3
2
1
0
Reserved
ADD
DEL
Initial values after reset
0
0
0
0
0
0
0
0
BIT NAME
FUNCTION
7–2 Reserved Writes to this location are ignored and are read as 0.
1
ADD
Address add. When ADD is asserted, the TNETX15AE uses the information contained in the management add/edit
address interface to add or edit an address in the lookup table. ADD remains asserted until the add process is complete.
0
DEL
See the delete command bit description and the description of the delnode registers (0x48–0x4f).
The adddelcontrol register can be read at any time. If the ADD or DEL bit is being written and that bit is already
set, the DIO interface will stall and SRDY will be delayed until the current cycle completes. If neither of these
two bits is already set during a write, a normal cycle results.
add address register, addnode at 0x38–0x3D (DIO)
The unicast or multicast address in this register (written in Ethernet native data format) is added to the lookup
table when the ADD bit in the adddelcontrol register is set to 1, along with the data in the addport register. The
default value of this register after reset is 0x00.00.00.00.00.00.
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