KSZ8851-16MLL TR Micrel Inc, KSZ8851-16MLL TR Datasheet - Page 40

• Manufacturer Part Number: KSZ8851-16MLL TR
• Description: Single Ethernet Port + Generic (16-bit) Bus Interface( )
• Manufacturer: Micrel Inc

Specifications of KSZ8851-16MLL TR

• Operating Supply Voltage (typ): 3.3V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / RoHS Status: Compliant

Register Map: MAC, PHY and QMU
Do not write to bit values or to registers defined as Reserved. Manipulating reserved bits or registers causes
unpredictable and often fatal results. If the user wants to write to these reserved bits, the user has to read back these
reserved bits (RO or RW) first, then “OR” with the read value of the reserved bits and write back to these reserved bits.
Bit Type Definition
RO = Read only.
WO = Write only.
RW = Read/Write.
W1C = Write 1 to Clear (writing an “1” to clear this bit).
0x00 – 0x07: Reserved
Chip Configuration Register (0x08 – 0x09): CCR
This register indicates the chip configuration mode based on strapping and bonding options
0x0A – 0x0F: Reserved
Host MAC Address Registers: MARL, MARM and MARH
These Host MAC address registers are loaded starting at word location 0x1 of the EEPROM upon hardware reset. The
software driver can read or write these registers value, but it will not modify the original Host MAC address value in the
EEPROM. These six bytes of Host MAC address in external EEPROM are loaded to these three registers as mapping
below:
MARL[15:0] = EEPROM 0x1(MAC Byte 2 and 1)
MARM[15:0] = EEPROM 0x2(MAC Byte 4 and 3)
August 2009
Micrel, Inc.
Bit
15-11
10
9
8
7
6
5
4
3
2
1
0
-
-
-
0
-
-
0
-
0
0
-
0
Default Value
R/W
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Description
Reserved.
Bus Endian mode
The EESK (pin 10) value is latched into this bit druing power-up/reset.
0: Bus in Big Endian mode, 1: Bus in Little Endian mode.
EEPROM presence
The EED_IO (pin 9) value is latched into this bit druing power-up/reset.
0: No external EEPROM, 1: Use external EEPROM.
Reserved.
8-Bit data bus width
This bit value is loaded from P1LED1 (pin 1)
0: Not in 8-bit bus mode operation, 1: In 8-bit bus mode operation.
16-Bit data bus width
This bit value is loaded from P1LED1 (pin 1)
0: Not in 16-bit bus mode operation, 1: In 16-bit bus mode operation.
Reserved.
Shared data bus mode for data and address
0: Data and address bus are seperated.
1: Data and address bus are shared.
Reserved.
Reserved.
48-Pin Chip Package
To indicate chip package is 48-pin.
0: No, 1: Yes.
Reserved.
40
KSZ8851-16MLL/MLLI
M9999-083109-2.0