Frame Number Register (Frame); Index Register For Selecting The Endpoint Status And Control Registers (Index); Frame Number Register (Frame) Field Descriptions; Index Register For Selecting The Endpoint Status And Control Registers (Index) Field Descriptions - Texas Instruments TMS320DM357 User Manual

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4.53 Frame Number Register (FRAME)

The Frame Number Register (FRAME) is shown in
15
Reserved
R-0
LEGEND: R = Read only; -n = value after reset
Bit Field
15-11 Reserved
10-0 FRAMENUMBER

4.54 Index Register for Selecting the Endpoint Status and Control Registers (INDEX)

The Index Register for Selecting the Endpoint Status and Control Registers (INDEX) is shown in
and described in Table
Figure 69. Index Register for Selecting the Endpoint Status and Control Registers (INDEX)
7
Reserved
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 70. Index Register for Selecting the Endpoint Status and Control Registers (INDEX)
Bit Field Value
7-4 Reserved 0
3-0 EPSEL 0-Fh
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Figure 68. Frame Number Register (FRAME)
11 10
Table 69. Frame Number Register (FRAME) Field Descriptions
Value Description
0 Reserved
0-7FFh Last received frame number
70.
4
R-0
Field Descriptions
Description
Reserved
Each transmit endpoint and each receive endpoint have their own set of control/status registers. EPSEL
determines which endpoint control/status registers are accessed.
Before accessing an endpoint's control/status registers, the endpoint number should be written to the
Index register to ensure that the correct control/status registers appear in the memory map.
Figure 68 and described in
FRAMENUMBER
R-0
3
EPSEL
R/W-0
Universal Serial Bus (USB) Controller
Registers
Table 69.
0
Figure 69
0
117