SJA1105 power suppply

[haiyang]

hi,

i use the sja1105 to designed a ethernet switch.

i reference the SJA1105UM and MPC-LS-VNP-RDB board (SCH-45700).
int the SJA1105UM refer to:

so,i think the VDDIO_MIIX  pin only can be supply 2.5V or 3.3V .

But in the MPC-LS-VNP-RDB board (SCH-45700), it show :

the VDDIO_MII4  supply 1.2V.

so , whether have some err in the different doc?

haiyang

best wish. 

[guoweisun · Accepted solution]

The SGMII port on SJA1105R/S has two supply domains: 1.2V and 2.5V for analog IO.