AN2136SC Cypress Semiconductor Corp, AN2136SC Datasheet - Page 136

• Manufacturer Part Number: AN2136SC
• Description: IC MCU 8051 8K RAM 24MHZ 44QFP
• Manufacturer: Cypress Semiconductor Corp
• Series: EZ-USB®r

Specifications of AN2136SC

• 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: 428-1309

The Setup Data Pointer can be used for any Get_Descriptor request; for example,
Get_Descriptor-String. It can also be used for vendor-specific requests (that you define),
as long as bytes 6-7 contain the number of bytes in the transfer (for step 1).
It is possible for the 8051 to do manual CONTROL transfers, directly loading the
IN0BUF buffer with the various packets and keeping track of which SETUP phase is in
effect. This would be a good USB training exercise, but not necessary due to the hardware
support built into the EZ-USB core for CONTROL transfers.
For DATA stage transfers of fewer than 64 bytes, moving the data into the IN0BUF buffer
and then loading the EP0INBC register with the byte count would be equivalent to loading
the Setup Data Pointer. However, this would waste 8051 overhead because the Setup Data
Pointer requires no byte transfers into the IN0BUF buffer.
7.3.4.2
EZ-USB TRM v1.9
4. Automatically checks for errors and re-transmits data packets if necessary.
5. Responds to the third (handshake) phase of the CONTROL transfer to terminate
index. This constitutes the second phase of the three-phase CONTROL transfer.
The core Packetizes the data into multiple data transfers as necessary.
the operation.
Get Descriptor-Configuration
Byte
0
1
2
3
4
5
6
7
bmRequestType
bRequest
wValueL
wValueH
wIndexL
wIndexH
wLengthL
wLengthH
Field
Table 7-11. Get Descriptor-Configuration
Value
LenL
LenH
0x80
0x06
0x02
CFG
0x00
0x00
Chapter 7. EZ-USB CPU
IN, Device
“Get_Descriptor”
Config Number
Descriptor Type:
Configuration
Meaning
Set SUDPTR H-L to start of
Configuration Descriptor table in
RAM
8051 Response
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