Nec Network Controller uPD98502 Manual de usuario descargar pdf (Pagina 300)

CHAPTER 5 ETHERNET CONTROLLER

Preliminary User’s Manual S15543EJ1V0UM

5.3 Operation

5.3.1 Initialization

After a power on reset or a software reset, V

4120A has to set the following registers:

i) Interrupt Mask Registers

ii) Configuration Registers

iii) MII Management Registers

iv) Pool/Buffer Descriptor Registers

5.3.2 Buffer structure for Ethernet Controller block

The data buffer structure for Ethernet Controller is shown in Figure 5-4.

Figure 5-4. Buffer Structure for Ethernet Block

Buffer Descriptor

Link Pointer

Buffer Descriptor

Link Pointer (null)

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Nec Network Controller uPD98502 Manual de usuario Pagina 300