ZL50409 Datasheet, PDF (27/135 Pages) Zarlink Semiconductor Inc – Managed 9-Port 10/100M Ethernet Switch

ZL50409
Processor
3-bit Address Bus 8/16-bit Data Bus
Address
I/O Data MUX
Data Sheet
Index Reg 1
(Addr = 1)
Index Reg 0
(Addr = 0)
Config Data
Reg
(Addr = 2)
16-bit Address 8-bit Data Bus
CPU Frame Reg
(Addr = 3)
Command/
Status Reg
(Addr = 4)
8/16-bit Data Bus
Interrupt
Reg
(Addr = 5)
Control
Command 1 Reg
(Addr = 6)
Control
Command 2
Reg
(Addr = 7)
8/16-bit Data Bus
Internal
Registers
Inderect
Access
CPU frame
CPU frameTransmit
Receive ^FIFO
FIFO
Control
Control Command 1
Command 1Transmit
Receive FIFO
FIFO
Control
Command 2
Transmit
FIFO
Interrupt
Figure 3 - Overview of the 8/16-bit Interface
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Zarlink Semiconductor Inc.