Related Manuals for Exar SP338
Summary of Contents for Exar SP338
- Page 1 SP338/SP339/XR34350 EVALUATION BOARD USER’S MANUAL REV. 2.0.1 Evaluation Board User’s Manual SP338/SP339/XR34350EVB...
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Page 2: Package List
40-pin QFN package. The primary difference is that the SP339 and XR34350 only have 4 modes of operation (2 mode control pins) while the SP338 has 8 modes of operation (3 mode control pins). Table 1 shows the different devices and packages that this evaluation board supports, and the corresponding ordering part numbers for each. -
Page 3: Loopback Mode
SP338/SP339/XR34350 EVALUATION BOARD USER’S MANUAL REV. 2.0.1 The SP338/339/XR34350 have internal pull-down resistors on these pins. So the corresponding MODE pins will be ’0’ unless a jumper is installed on the J23 pins listed above to change the MODE bit to ’1’. - Page 4 SP338/SP339/XR34350 EVALUATION BOARD USER’S MANUAL REV. 2.0.1 2.1.2 RS-232 Mode below shows the SP338/339/XR34350 configured in the RS-232 mode. Figure 3 J23 Pins 7 & 8 (MODE0) - ’1’ (jumper installed between these pins) J23 Pins 9 & 10 (MODE1) - ’0’...
- Page 5 REV. 2.0.1 2.1.3 Half-Duplex RS-485 Mode #1 below shows the SP338/339/XR34350 configured in the half-duplex RS-485 mode #1. Figure 4 J23 Pins 7 & 8 (MODE0) - ’0’ J23 Pins 9 & 10 (MODE1) - ’1’ (jumper installed between these pins) J23 Pins 11 &...
- Page 6 REV. 2.0.1 2.1.4 Full-Duplex RS-485/422 Mode #1 below shows the SP338/339/XR34350 configured in the full-duplex RS-485/422 mode #1. Figure 5 J23 Pins 7 & 8 (MODE0) - ’1’ (jumper installed between these pins) J23 Pins 9 & 10 (MODE1) - ’1’ (jumper installed between these pins) J23 Pins 11 &...
- Page 7 SP338/SP339/XR34350 EVALUATION BOARD USER’S MANUAL REV. 2.0.1 2.1.5 Full-Duplex RS-485/422 Mode #2 (SP338 only) below shows the SP338 configured in the full-duplex RS-485/422 mode #2. Figure 6 J23 Pins 7 & 8 (MODE0) - ’0’ J23 Pins 9 & 10 (MODE1) - ’0’...
- Page 8 REV. 2.0.1 2.1.6 Full-Duplex RS-485/422 Mode #3 (SP338 Only) below shows the SP338 configured in the full-duplex RS-485/422 mode #3. Figure 7 J23 Pins 7 & 8 (MODE0) - ’1’ (jumper installed between these pins) J23 Pins 9 & 10 (MODE1) - ’0’ (jumper installed between these pins) J23 Pins 11 &...
- Page 9 REV. 2.0.1 2.1.7 Half-Duplex RS-485 Mode #2 (SP338 Only) below shows the SP338/339/XR34350 configured in the half-duplex RS-485/422 mode #2. Figure 8 J23 Pins 7 & 8 (MODE0) - ’0’ J23 Pins 9 & 10 (MODE1) - ’1’ (jumper installed between these pins) J23 Pins 11 &...
- Page 10 REV. 2.0.1 2.1.8 RS-485/422 Mixed Duplex Mode (SP338 Only) below shows the SP338 configured in the full-duplex RS-485/422 mode. Figure 9 J23 Pins 7 & 8 (MODE0) - ’1’ (jumper installed between these pins) J23 Pins 9 & 10 (MODE1) - ’1’ (jumper installed between these pins) J23 Pins 11 &...
- Page 11 J23 pins 15 & 16. 2.2.6 ENABLE This pin enables/disables the SP338/339/XR34350. This pin has an internal pull-down. When shipped from the factory, there will be a jumper installed across J23 pins 17 & 18 to enable the SP338/339/XR34350.
- Page 12 USB bus, as described above. A jumper should also be installed across J2 pins 1 & 2 (or 3 & 4) to ensure that there’s a common ground between the XR21B1411 and SP338/ 339/XR34350.
- Page 13 NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement.
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