11
ASC Breakout Board
ASC Interface Connector
The ASC Interface Connector (shown in Figure 11 from Schematic Sheet 2) is used to connect the ASC Breakout
Board to the main FPGA Board. The connector has been designed to pair with other available Lattice Evaluation
Boards, including the Platform Manager 2 Evaluation Board (see the related literature section for more details).
The connector includes all the mandatory signals for connecting the ASC device to the hardware management
controller as described in the system connections section of the ASC datasheet. This includes the ASC-Interface
Signals, the I2C signals, and the Clock and Reset signals. The connector also includes a set of power rails as
described in Table 3. Additionally, the connector provides the 5 V and 12 V Hot Swap signals.
Figure 11. ASC Interface Connector
Table 3. ASC Interface Connector Pin Description
Pin #
Signal Name
Description
1
GND
Shared ground signal with main FPGA Board
2
ASC_WDAT
ASC-Interface Signal – must be connected to FPGA PIO and assigned
in Diamond
3
ASC_RDAT
ASC-Interface Signal – must be connected to FPGA PIO and assigned
in Diamond
4
ASC_WRCLK
ASC-Interface Signal – must be connected to FPGA PIO and assigned
in Diamond
5
MANDATORY_RESET
RESETb signal if ASC device is declared as mandatory in Platform
Designer. Must match J12 setting (Reset Configuration). Must be con-
nected to FPGA PIO and assigned in Diamond.
6
GND
Shared ground signal with main FPGA Board
7
I2C_WRITE_EN
Connected to GPIO1 through R4. Used with optional ASC Write Protect
feature. Connect to FPGA PIO and assign in Diamond if this feature is
used.
8
ASC_CLK
8-MHz Clock Output by ASC0 in ASC hardware management controller
systems. This signal is NC for all non-ASC0 ASC devices. ASC0
devices should connect to FPGA PCLK input and assign to ASCCLK
signal in Diamond
ASC Interface Connector
ASC_
W
DAT
ASC_RDAT
ASC_
W
RCLK
MA
N
DATORY_RESET
ASC_RESET
I2C_
W
RITE_E
N
+5
V
_HS
+12
V
_HS
I2C_SCL
I2C_SDA
5
V
_OC_SE
N
SE
12
V
_OC_SE
N
SE
LED2
LED3
ASC_CLK
+3.3
V
ASC_12
V
_OC_SHUTDO
WN
+5
V
_HS
+12
V
_HS
+3.3
V
+11.3
V
ASC_5
V
_OC_SHUTDO
WN
J10
CO
NN
DSUB 25-P
1
14
2
15
3
16
4
17
5
1
8
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
R7
0
R
8
0
