AN2131QC Cypress Semiconductor Corp, AN2131QC Datasheet - Page 128

• 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

7.3.1 Get Status
The USB Specification version 1.0 defines three USB status requests. A fourth request, to
an interface, is indicated in the spec as “reserved.” The four status requests are:
The EZ-USB core activates the SUDAV interrupt request to tell the 8051 to decode the
SETUP packet and supply the appropriate status information.
EZ-USB TRM v1.9
•
•
•
•
Remote Wakeup (Device request)
Self-Powered (Device request)
Stall (Endpoint request)
Interface request (“reserved”)
Token Packet
Token Packet
Token Packet
S
E
T
U
P
N
O
U
T
I
A
D
D
R
A
D
D
R
A
D
D
R
STATUS Stage
Interrupt
SUTOK
E
N
D
P
E
N
D
P
E
N
D
P
DATA Stage
SETUP Stage
C
R
C
5
C
R
C
5
C
R
C
5
Data Pkt
D
A
T
A
1
D
A
T
A
1
D
A
T
A
0
Data Packet
Data Packet
Figure 7-4. Data Flow for a Get_Status Request
Bytes
C
R
C
1
6
8 bytes
Setup
2
Data
H/S Pkt
C
R
C
1
6
A
C
K
C
R
C
1
6
Chapter 7. EZ-USB CPU
H/S Pkt
H/S Pkt
A
C
K
Interrupt
SUDAV
A
C
K
8 RAM
64-byte
bytes
Buffer
2
SETUPDAT
IN0BUF
IN0BC
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