mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 285

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Reset
MOTOROLA
12.3.2.18 USB Endpoint 0–7 Data Registers (EPnDR)
Figure 12-22 shows the USB endpoint 0-7 data registers.
Table 12-17 lists field descriptions for the USB endpoint 0–7 data registers.
12.3.2.19 USB Endpoint 0–7 Data Present Registers (EPnDPR)
Figure 12-23 shows the USB endpoint 0-7 data present registers. used to coordinate user
access to FIFO with external devices to prevent data loss (overwrite) says how much free
space is still available. Gives amount of data just received.
Field
Addr
R/W
31–0
Bits
15
Reset
Reset
Field
Figure 12-22. USB Endpoint 0-7 Data Present Registers
Field
Addr
R/W
R/W
Name
DATA
Figure 12-21. USB Endpoint 0-7 Data Registers (EPnDR)
31
15
The EPnDR registers allow data to be written to/from each endpoint’s FIFO. For IN
endpoints, the registers are write-only and writing to a full FIFO is ignored. For OUT
endpoints, the registers are read-only, and reading from an empty FIFO returns
undefined data. These registers can be accessed using 8-, 16-, or 32-bit accesses in
order to read/write 1, 2, or 4 bytes from/to the FIFO at one time.
MBAR + 0x10CE, 0x10D2, 0x10D6, 0x10DA, 0x10DE, 0x10E2, 0x10E6, 0x10EA
MBAR + 0x10AC, 0x10B0, 0x10B4, 0x10B8, 0x10BC, 0x10C0, 0x10C4, 0x10C8
—
Table 12-17. EPnDR Field Descriptions.
Chapter 12. Universal Serial Bus (USB)
0000_0000_0000_0000
0000_0000_0000_0000
0000_0000_0000_0000
9
8
Description
DATA
DATA
Read
R/W
R/W
Register Description and Programming Model
DATA_PRES
(
EP
n
DPR)
16
0
12-25
0