Lattice Semiconductor L-ASC10, User Manual

Page: 9 / 49

9
ASC Breakout Board
Figure 6. Temperature Monitor Connections
The temperature monitor components and signals are summarized in Table 2 below.
Table 2. Temperature Monitor Components and Signals
LED Outputs
The ASC Breakout Board has 9 LEDs tied to the ASC open-drain outputs. The LEDs are pulled up to 3.3 V and are
lit when GPIO1-GPIO10 are driven to a logic low (GPIO7 is not bonded out of the ASC). The LED circuit is shown
in Figure 7 below (taken from Sheet 8 of the schematic).
Figure 7. ASC GPIO LEDs
Push Button
The breakout board has one push-button (SW2), shown in Figure 8 (taken from Sheet 5 of the schematic). This sig-
nal is routed to GPIO10 of the ASC. This GPIO must be configured as an input in Platform Designer in order to use
the push-button. When the button is pressed, GPIO10 is set to 0. When the button is released, GPIO10 is pulled to
1 by R82 (see the LED outputs section). The input signal can be used in the logic design of the main board FPGA.
GPIO10 is shared with LED10, pressing the push-button (SW2) will cause LED10 to illuminate.
Component / Signals Ref. Des.
Schematic
Sheet
Description
Components Populated on Breakout Board
Temperature Sensor Q3, Q4 5 2N3906 PNP Transistor connected in Beta-Compen-
sated PNP configuration.
Series Resistors C3, C4 2 150 pF input filter capacitors for temperature monitor-
ing signals to reject noise.
Signals
TEMP_SENSE1P /
TEMP_SENSE1N 2, 5 Input from temperature sensor to TMON1 (tempera-
ture monitor input) of L-ASC10
TEMP_SENSE2P /
TEMP_SENSE2N 2, 5 Input from temperature sensor to TMON2 (tempera-
ture monitor input) of L-ASC10
TEMP_SE N SE1P
TEMP_SE N SE1 N
TEMP_SE N SE2P
TEMP_SE N SE2 N
C3
150pF
C4
150pF
TMO N 1P
21
TMO N 1 N
22
TMO N 2P
23
TMO N 2 N
24
LED2 LED3 LED4 LED5 LED6 LED 8 LED9 LED10 LED1
LED[1:10]
+3.3 V
D1
Red
R N 1A
2.2k
10
1
R N 2B
2.2k
2
R N 1C
2.2k
3
D4
Red
R 8 2
2.2k
R N 1G
2.2k
8
R N 1F
2.2k
7
R N 1E
2.2k
5
6
R N 1H
2.2k
9
D2
Red
D6
Red
R N 2A
2.2k
10
1
R N 2D
2.2k
4
D7
Red
R N 1B
2.2k
2
R N 2E
2.2k
5
6
R N 2F
2.2k
7
R N 2C
2.2k
3
D 8
Red
R 8 1
2.2k
R N 1D
2.2k
4
D3
Red
D5
Red
R N 2H
2.2k
9
R N 2G
2.2k
8
D9
Red