2
SP338/SP339/XR34350 EVALUATION BOARD USER’S MANUAL
REV. 2.0.1
1.0 INTRODUCTION
This user’s manual is for the SP338/SP339/XR34350 evaluation board. The SP338, SP339 and XR34350 are
pin compatible devices and are all offered in the 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.
T
ABLE
1: P
ACKAGE
L
IST
D
EVICE
O
RDERING
P
ART
N
UMBER
E
VALUATION
B
OARD
O
RDERING
P
ART
N
UMBER
D
EVICE
P
ACKAGE
D
EVICE
L
OCATION
XR34350IL
XR34350ILEVB
40-pin QFN
U3
SP338EER1-L
SP338EER1-0A-EB
40-pin QFN
U3
SP339EER1-L
SP339EER1-0A-EB
40-pin QFN
U3
2.0 EVALUATION BOARD OVERVIEW
A block diagram of the evaluation board is shown in
Figure 1
below..
F
IGURE
1. E
VALUATION
B
OARD
B
LOCK
D
IAGRAM
XR21B1411
SP338
SP339
XR34350
SW3
SW4
USB
Connector
DB9
Connector
In addition to the DUT (SP338/SP339/XR34350), there is an Exar XR21B1411 1-ch USB UART on this
evaluation board. When shipped from the factory, the SW3 and SW4 switches are off. Therefore, the SP338/
339/XR34350 is isolated from both the XR21B1411 and the DB9 connector. To enable the connections
between the XR21B1411 and the SP338/339/XR34350, place all switches on SW3 in the ON position. To
enable the connections between the SP338/339/XR34350 and the DB9 connector, place all switches on SW4
to the ON position. All SP338/339/XR34350 signals are accessible from the test points on the board. The test
points are shown in each figure showing the modes.
2.1
Mode Selection
The modes of the SP338 are selected using the following pins at J23:
?
Pins 7 & 8 - labeled MODE0 on the board
?
Pins 9 & 10 - labeled MODE1 on the board
?
Pins 11 & 12 - labeled MODE2 on the board
Note that the SP339 does not have a MODE2 pin, so the SP339 modes are only controlled via the MODE1 and
MODE0 pins.
