LAN8810 Datasheet, PDF (24/83 Pages) Microchip Technology – GMII 10/100/1000 Ethernet Transceiver

LAN8810/LAN8810I
3.8.1.2.1
Configuring the SMI Address (CONFIG[1:0])
The SMI address may be configured via hardware to any value between 0 and 7. If an address greater than 7 is required,
the user can configure the PHY address using Software Configuration via the PHYADD[4:0] field of the 10/100 Special
Modes Register (after SMI communication at an address is established).
The CONFIG1 pin is used to configure both the SMI address and the value of the Pause Operation (PAUSE) bit in the
Auto Negotiation Advertisement Register. The user must first determine the desired PAUSE value. The configuration
pin values for CONFIG1 and CONFIG0 should then be selected using Table 3-6 (PAUSE=0) or Table 3-7 (PAUSE=1),
respectively.
TABLE 3-7: SMI ADDRESS CONFIGURATION WITH PAUSE=0
PHYADD[2:0]
000
001
010
011
100
101
110
111
CONFIG1
CPV(0)
CPV(0)
CPV(0)
CPV(0)
CPV(1)
CPV(1)
CPV(1)
CPV(1)
CONFIG0
CPV(0)
CPV(1)
CPV(2)
CPV(3)
CPV(0)
CPV(1)
CPV(2)
CPV(3)
TABLE 3-8: SMI ADDRESS CONFIGURATION WITH PAUSE=1
PHYADD[2:0]
000
001
010
011
100
101
110
111
CONFIG1
CPV(2)
CPV(2)
CPV(2)
CPV(2)
CPV(3)
CPV(3)
CPV(3)
CPV(3)
CONFIG0
CPV(0)
CPV(1)
CPV(2)
CPV(3)
CPV(0)
CPV(1)
CPV(2)
CPV(3)
3.8.1.2.2
Configuring the Mode of Operation (CONFIG[3:2])
This section describes the initial modes of operation that are available using the CONFIG[3:2] configuration pins. The
user may configure additional modes using Software Configuration when the CONFIG[3:2] options do not include the
desired mode.
The CONFIG3 pin is used to configure the values of the MOD field (19.15:11) The configuration pin values for CONFIG3
and CONFIG2 should be selected using Table 3-8. These tables also detail how the MOD field of the Extended Mode
Control/Status Register will be configured.
DS00001870B-page 24
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