AN2131-DK001 Cypress Semiconductor Corp, AN2131-DK001 Datasheet - Page 222

• Manufacturer Part Number: AN2131-DK001
• Description: KIT EZ-USB DEVELOPMENT BOARD
• Manufacturer: Cypress Semiconductor Corp

Specifications of AN2131-DK001

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1333

These registers control EZ-USB CONTROL endpoint zero. Because endpoint zero is a bi-
directional endpoint, the IN and OUT functionality is controlled by a single control and
status (CS) register, unlike endpoints 1-7, which have separate INCS and OUTCS regis-
ters.
Bit 3:
OUTBSY is a read-only bit that is automatically cleared when a SETUP token arrives.
The 8051 sets the OUTBSY bit by writing a byte count to EPOUTBC.
EZ-USB TRM v1.9
EP0CS
IN0BC
OUT0BC
12.12 Endpoint 0 Control and Status Registers
R/W
R/W
b7
b7
b7
R
0
0
0
-
-
-
OUTBSY
BC6
BC6
R/W
R/W
b6
b6
b6
R
-
0
0
0
BC5
BC5
R/W
R/W
Endpoint Zero Control and Status
Figure 12-25. Port Configuration Registers
b5
b5
b5
R
0
0
Endpoint Zero OUT Byte Count
0
-
Endpoint Zero IN Byte Count
OUT Endpoint Busy
Chapter 12. EZ-USB Registers
BC4
BC4
R/W
R/W
b4
b4
b4
R
0
0
0
-
OUTBSY
BC3
BC3
R/W
R/W
b3
b3
b3
R
1
0
0
INBSY
BC2
BC2
R/W
R/W
b2
b2
b2
R
0
0
0
HSNAK
BC1
BC1
R/W
R/W
R/W
b1
b1
b1
0
0
0
EP0STALL
Page 12-29
BC0
BC0
R/W
R/W
R/W
b0
b0
b0
0
0
7FC5
0
7FB4
7FB5