AN2135SC Cypress Semiconductor Corp, AN2135SC Datasheet - Page 131

• Manufacturer Part Number: AN2135SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2135SC

• 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: 8
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1308

Get_Status/Interface is easy: the 8051 returns two zero bytes through IN0BUF and clears
the HSNAK bit. The requested bytes are shown as “Reserved (Reset to zero)” in the USB
Specification
7.3.2 Set Feature
Set Feature is used to enable remote wakeup or stall an endpoint. No data stage is
required.
The only Set_Feature/Device request presently defined in the USB specification is to set
the remote wakeup bit. This is the same bit reported back to the host as a result of a Get
Status-Device request (Table 7-3). The host uses this bit to enable or disable remote
wakeup by the device.
Page 7-10
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
Table 7-6. Set Feature-Device (Set Remote Wakeup Bit)
Field
Field
Table 7-5. Get Status-Interface
Value
Value
0x81
0x00
0x02
0x00
0x00
0x03
0x01
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
Chapter 7. EZ-USB CPU
IN, Endpoint
“Get Status”
Two bytes requested
OUT, Device
“Set Feature”
Feature Selector:
Remote Wakeup
Meaning
Meaning
Load two bytes into IN0BUF
Byte 0 : zero
Byte 1 : zero
Set the Remote Wakeup bit
8051 Response
8051 Response
EZ-USB TRM v1.9