KSZ8841-16MBLI Micrel Inc, KSZ8841-16MBLI Datasheet - Page 43

• Manufacturer Part Number: KSZ8841-16MBLI
• Description: IC MAC CTRLR 8/16BIT 128LQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8841-16MBLI

• Controller Type: Ethernet Controller, MAC
• Interface: Bus
• Voltage - Supply: 3.1 V ~ 3.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

Micrel, Inc.
KSZ8841-16/32 MQL/MVL/MBL
CPU Interface I/O Registers
The KSZ8841M provides an EISA-like, ISA-like, or VLBUS-like bus interface for the CPU to access its internal I/O
registers. I/O registers serve as the address that the microprocessor uses when communicating with the device. This is
used for configuring operational settings, reading or writing control, status information, and transferring packets by reading
and writing through the packet data registers.
I/O Registers
Input/Output (I/O) registers are limited to 16 locations as required by most ISA bus-based systems; therefore, registers
are assigned to different banks. The last word of the I/O register locations (0xE - 0xF) is shared by all banks and can be
used to change the bank in use.
The following I/O Space Mapping Tables apply to 8, 16 or 32-bit bus products. Depending upon the bus interface used
and byte enable signals (BE[3:0]N control byte access), each I/O access can be performed as an 8-bit, 16-bit, or 32-bit
operation. (The KSZ8841M is not limited to 8/16-bit performance and 32-bit read/write are also supported).
October 2007
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M9999-102207-1.6