AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 137

• Manufacturer Part Number: AN2131QC
• Description: IC MCU 8051 8K RAM 24MHZ 80BQFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2131QC

• Applications: USB Microcontroller
• Core Processor: 8051
• Program Memory Type: ROMless
• Controller Series: AN213x
• Ram Size: 8K x 8
• Interface: I²C, USB
• Number Of I /o: 24
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1307

7.3.4.3
Configuration and string descriptors are handled similarly to device descriptors. The 8051
firmware reads byte 2 of the SETUP data to determine which configuration or string is
being requested, loads the corresponding table pointer into SUDPTRH-L, and the EZ-
USB core does the rest.
7.3.5 Set Descriptor
Page 7-16
Get Descriptor-String
Byte
Byte
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
bmRequestType
bRequest
wValueL
wValueH
wIndexL
wIndexH
wLengthL
wLengthH
bmRequestType
bRequest
wValueL
wValueH
wIndexL
wIndexH
wLengthL
wLengthH
Field
Field
Table 7-13. Set Descriptor-Device
Table 7-12. Get Descriptor-String
Value
LenH
Value
LenH
LenL
LenL
0x80
0x06
0x02
0x00
0x07
CFG
0x00
0x00
0x00
0x01
0x00
0x00
Chapter 7. EZ-USB CPU
IN, Device
“Get_Descriptor”
String Number
Descriptor Type:
String
(Language ID L)
(Language ID H)
OUT, Device
“Set_Descriptor”
Descriptor Type:
Device
Meaning
Meaning
Set SUDPTR H-L to start of
Configuration Descriptor table in
RAM
Read device descriptor data over
OUT0BUF
8051 Response
8051 Response
EZ-USB TRM v1.9