AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 140

• 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

7.3.6 Set Configuration
When the host issues the Set_Configuration request, the 8051 saves the configuration
number (byte 2 in Table Table 7-16), performs any internal operations necessary to sup-
port the configuration, and finally clears the HSNAK bit (by writing “1” to it) to terminate
the Set_Configuration CONTROL transfer.
7.3.7 Get Configuration
The 8051 returns the current configuration number. It loads the configuration number into
EP0IN, loads a byte count of one into EP0INBC, and finally clears the HSHAK bit (by
writing “1” to it) to terminate the Set_Configuration CONTROL transfer.
EZ-USB TRM v1.9
Note
After setting a configuration, the host issues Set_Interface commands to set up the vari-
ous interfaces contained in the configuration.
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 7-17. Get Configuration
Table 7-16. Set Configuration
Value
Value
0x00
0x09
0x80
0x08
CFG
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
1
0
Chapter 7. EZ-USB CPU
OUT, Device
“Set_Configuration”
Config Number
IN, Device
“Get_Configuration”
LenL
LenH
Meaning
Meaning
Read and stash byte 2, change
configurations in firmware
Send CFG over IN0BUF after
re-configuring
8051 Response
8051 Response
Page 7-19