KSZ8864RMN Micrel Inc, KSZ8864RMN Datasheet - Page 47

• Manufacturer Part Number: KSZ8864RMN
• Description: IC ETHERNET SW 4PORT 64QFN
• Manufacturer: Micrel Inc

Specifications of KSZ8864RMN

• Controller Type: Ethernet Switch Controller
• Interface: MII, RMII
• Voltage - Supply: 1.8V, 2.5V, 3.3V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Supplier Unconfirmed
• Current - Supply: -
• Lead Free Status / RoHS Status: Supplier Unconfirmed, Lead free / RoHS Compliant
• Other names: 576-3787; KSZ8864RMN

Micrel, Inc.
KSZ8864RMN
SMI register Read access is selected when OP Code is set to “10” and bits [2:1] of the PHY address is set to ‘11’.
SMI register Write access is selected when OP Code is set to “01” and bits [2:1] of the PHY address is set to ‘11’.
The 8-bit register address is the concatenation of {PHY address bits [4:3], PHY address bits [0], REG address
bit[4:0]}. Since the switch configuration registers are 8-bit wide, only the lower 8 bits of Data Bits [15:0] are used.
To access the KSZ8864RMN registers 0-255 (0x00 – 0xFF), the following applies:
PHYAD [4, 3, 0] and REGAD [4:0] are concatenated to form the 8-bit address; that is, {PHYAD [4,3,0], REGAD[4:0]}
= bits [7:0] of the 8-bit address.
Registers are eight data bits wide. For read operation, data bits [15:8] are read back as 0’s. For write operation, data
bits [15:8] are not defined, and hence can be set to either 0s or 1s.
SMI register access is the same as the MIIM register access, except for the register access requirements presented
in this section.
47
January 2011
M9999-012011-1.2