
SDM Pins
MSEL Function
Configuration Source Function
Avalon-ST x8
AS x4
SDM_IO14
—
AVSTx8_CLK
—
SDM_IO15
—
AVSTx8_DATA6
—
SDM_IO16
—
—
—
2.5.2. MSEL Settings
After power-on
MSEL[2:0]
pins specify the configuration scheme for Intel Agilex devices. Use 4.7-kΩ resistors to pull the
MSEL[2:0]
pins up to V
CCIO_SDM
or down to ground as required by the
MSEL[2:0]
setting for your configuration scheme.
Figure 8.
MSEL Pull-Up and Pull-Down Circuit Diagram
R
UP
V
CCIO_SDM
MSEL[0]
4.7kΩ
R
DN
MSEL[0]
4.7kΩ
OR
Table 4.
MSEL Settings for Each Configuration Scheme of Intel Agilex Devices
Configuration Scheme
MSEL[2:0]
Avalon-ST (x32)
000
Avalon-ST (x16)
101
Avalon-ST (x8)
110
AS (Fast mode – for CvP)
(2)
001
continued...
(2)
If you use AS Fast mode and are not concerned about 100 ms PCIe linkup, you must still ramp the
V
CCIO_SDM
supply within 18 ms.
This ramp-up requirement ensures that the AS x4 device is within its operating voltage range when the Intel Agilex device begins to
access it.
2. Intel Agilex Configuration Details
UG-20205 | 2019.10.09
Intel
®
Agilex
™
Configuration User Guide
27