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LAN9500AI データシート(PDF) 41 Page - Microchip Technology |
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LAN9500AI データシート(HTML) 41 Page - Microchip Technology |
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41 / 213 page  2010 - 2015 Microchip Technology Inc. DS00001875A-page 41 LAN950x 5.3.2.5.7 Set Configuration The device supports only one configuration. An occurrence of this command places the device into the Configured state. Since only one configuration is supported, 01h is the only supported configuration value. 5.3.2.5.8 Set Interface Only one interface is supported by the device. Therefore, this command is of marginal use. If the command is issued with an alternative setting of 00h and interface setting of 00h, as shown in Table 5-32, the device responds with an ACK. Otherwise it responds with a STALL handshake. 5.3.3 USB VENDOR COMMANDS The device implements several vendor specific commands in order to access CSRs and efficiently gather statistics. The vendor commands allow direct access to Systems CSRs and MAC CSRs. 5.3.3.1 Register Write Command The commands allows the Host to write a single register. Burst writes are not supported. All writes are 32-bits. TABLE 5-31: FORMAT OF SET CONFIGURATION SETUP STAGE Offset Field Value 0h bmRequestType 00h 1h bRequest 09h 2h wValue Configuration Value 4h wIndex 00h 6h wLength 00h TABLE 5-32: FORMAT OF SET INTERFACE SETUP STAGE Offset Field Value 0h bmRequestType 01h 1h bRequest 0Bh 2h wValue 00h 4h wIndex 00h 6h wLength 00h Note: When in the Normal state, accesses to the MAC CSRs are stalled. TABLE 5-33: FORMAT OF REGISTER WRITE SETUP STAGE Offset Field Value 0h bmRequestType 40h 1h bRequest A0h 2h wValue 00h 4h wIndex {0h, CSR Address[11:0]} 6h wLength 04h TABLE 5-34: FORMAT OF REGISTER WRITE DATA STAGE Offset Field 0h Register Write Data [31:0] |
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