WM8510-EV1M
w
Rev 1.1 April 2006
48
SOFTWARE INTERFACE
When using the WM8510-EV1B evaluation board with a DSP platform, the registers may be set
using the supplied software with a PC and USB port cable as shown in Figure 36.
If the DSP is being used to write to the WM8510 registers as well as supplying/receiving the audio
interface timing and data signals, then it is recommended that twisted pair or shielded wires are
used to connect the DSP platform to the WM8510-EV1B. If the DSP supplies are set to the same
voltage as the DBVDD supplies of the WM8510; a direct connection can be made to pins 4
(DUT_SCLK), pin 3 (DUT_CSB) and pin 5 (DUT_SDIN) of header H6 for 3-wire software mode as
shown in Figure 37. To select the correct control interface type, mode pin 7 (DUT_MODE) of
header H6 must also be connected.
If the DSP is running at a higher voltage (e.g. +5V) than the WM8510, then the signals from the
DSP platform should be connected to test points TP5 (USB_CSB), TP8 (USB_SCLK), TP11
(USB_SDIN), and TP12 (USB_MODE). Connecting the higher voltage signals from the DSP to the
test points will level shift them through the transistors down to the same level as the DBVDD supply
as shown in Figure 38. This will ensure that the WM8510 input CMOS thresholds (i.e. Logic High
(min) = DBVDD * 0.7; Logic Low (max) = DBVDD * 0.3) are met and no damage is done to the
device.
Similar connections apply for controlling the WM8510 via 2-wire software mode (i.e. only pins 4
(DUT_SCLK), pin 5 (DUT_SDIN) and pin 7 (DUT_MODE) of header H6 are used).
CONNECTION DIAGRAMS
Figure 36 DSP Connection with PC Control Using Wolfson Software
Содержание WM8510-EV1M
Страница 1: ...WM8510 EV1M Evaluation Board User Handbook Rev 1 1...
Страница 8: ...WM8510 EV1M w Rev 1 1 April 2006 8 INTERFACES Figure 1 Interfaces...
Страница 14: ...WM8510 EV1M w Rev 1 1 April 2006 14 WM8510 BLOCK DIAGRAM Figure 4 WM8510 Block Diagram...
Страница 29: ...WM8510 EV1M w Rev 1 1 April 2006 29 Figure 21 USB Controller Figure 22 Control Interface Level Shift...
Страница 30: ...WM8510 EV1M w Rev 1 1 April 2006 30 Figure 23 Audio Interface Level Shift Figure 24 Analogue Input...
Страница 31: ...WM8510 EV1M w Rev 1 1 April 2006 31 Figure 25 Analogue Output...
Страница 32: ...WM8510 EV1M w Rev 1 1 April 2006 32 Figure 26 WM8510...
Страница 33: ...WM8510 EV1M w Rev 1 1 April 2006 33 Figure 27 USB Power Supply Figure 28 External Power Supplies...
Страница 34: ...WM8510 EV1M w Rev 1 1 April 2006 34 PCB LAYOUT Figure 29 Silkscreen Top...
Страница 35: ...WM8510 EV1M w Rev 1 1 April 2006 35 Figure 30 Top Layer...
Страница 36: ...WM8510 EV1M w Rev 1 1 April 2006 36 Figure 31 Bottom Layer...
