Rx Buffer Configuration; Receive Buffer Configuration - NEC uPD98502 User Manual

6.6.2 Rx Buffer configuration

Data received from the USB is stored into a receive pool in system memory.
USB Controller uses three receive pools. The configuration of the receive pools is shown below.
The receive buffer is composed of the Buffer Directory and Data Buffer. The receive buffer is prepared in system
memory by the V 4120A.
R
The formats of the Buffer Directory, Buffer descriptor, and Link Pointer are each described below.
CHAPTER 6 USB CONTROLLER
Figure 6-13. Receive Buffer Configuration
B uffer D irectory
Buffer descriptor
Buffer descriptor
Buffer descriptor
Link pointer
Buffer descriptor
Buffer descriptor
Buffer descriptor
Link pointer
Preliminary User's Manual S15543EJ1V0UM
D ata Size
Buffer 1-64k Bytes
D ata
Buffer
D ata
Buffer
D ata
Buffer
D ata
Buffer
D ata
Buffer
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