L-Series support

The USB Device Library has been designed primarily for use with xCORE-USB (U-Series) devices. However, it does also support L-Series devices. This section describe the resource usage on the L-Series and changes required to build for L-Series devices.

Resource requirements

The resources used by the USB device and XUD libraries combined on an L-Series device are shown below:

Resource

Requirements

Logical Cores

2 plus one per endpoint

Channels

2 for Endpoint0 and 1 additional per IN and OUT endpoint

Timers

4 timers

Clock blocks

Clock block 0

Note: On the L-Series the XUD library uses clock block 0 and configures it to be clocked by the 60MHz clock from the ULPI transceiver. The ports it uses are in turn clocked from the clock block. Since clock block 0 is the default for all ports when enabled it is important that if a port is not required to be clocked from this 60MHz clock, then it is configured to use another clock block.

Ports and pins

The ports used for the physical connection to the external ULPI transceiver must be connected as shown in the table below.

L-Series required pin/port connections

Pin 1b

Port 4b

Signal 8b

X0D12

P1E0

 

ULPI_STP

X0D13

P1F0

 

ULPI_NXT

X0D14

 

P4C0

P8B0

ULPI_DATA[7:0]

X0D15

P4C1

P8B1

X0D16

P4D0

P8B2

X0D17

P4D1

P8B3

X0D18

P4D2

P8B4

X0D19

P4D3

P8B5

X0D20

P4C2

P8B6

X0D21

P4C3

P8B7

X0D22

P1G0

 

ULPI_DIR

X0D23

P1H0

 

ULPI_CLK

X0D24

P1I0

 

ULPI_RST_N

In addition some ports are used internally when the XUD library is in operation. For example pins X0D2-X0D9, X0D26-X0D33 and X0D37-X0D43 on an XS1-L8-128 device should not be used.

Please refer to the device datasheet for further information on which ports are available.

Reset requirements

On the L-Series the XUD_Manager requires a reset port and a reset clock block to be given.

Building for L-Series

Note: module_usb_device and module_xud upon which it depends both support both U-Series and L-Series devices, but the xSOFTip Explorer will only perform resource estimation with the U-Series library.

Note: Also, tools before the 13.0 release do not support automatically changing a target library. Therefore, if using xTIMEcomposer pre-13.0 the Makefile generated will have to be modified in order to compile for an L-Series device. Open the Makefile and add the line MODULE_LIBRARIES = xud_l.

See Also