The SYSMON provides two different external command interfaces. Although I2C and
PMBus modes leverage
similar
I2C transport structures, PMBus mode leverages the standard PMBus command interface. The
SYSMON I2C and PMBus address and MIO/EMIO pin locations are configurable through the
Control, Interface, and Processing IP (CIPS) and allows access to the SYSMON. Direct
access to the SYSMON registers can be limited for PMBUS interfaces by restricting
manufacturer specific commands in the CIPS IP.
Important: I2C/PMBUS restrictions for designs that use 2.5V or 3.3V on banks
500 and 501 exist for all package and speed grade combinations of VC1902, VC1802,
VM1802, VM1302, VM1402. See
Versal AI Core Series Production Errata (EN313)
and
Versal Prime Series Production Errata (EN314) for more
details.
Several Slave Addresses are reserved by both I2C and SMBUS standards
and should not be configured for I2C or PMBUS control interface. These addresses are
defined in the following table. The SYSMON I2C/PMBus interfaces are not available before
the SYSMON is configured. The SYSMON address can only be configured in the Control,
Interface, and Processing IP.Important: Neither I2C nor PMBus interfaces are active before the SYSMON is
configured to enable the interface.
| Reserved Address | Standard | |
|---|---|---|
| 000 0XXX |
0x00 - 0x07
|
I2C and SM Bus |
| 000 1000 |
0x08
|
SM Bus |
| 000 1001 |
0x09
|
SM Bus |
| 000 1011 |
0x0B
|
SM Bus |
| 000 1100 |
0x0C
|
SM Bus |
| 010 1000 |
0x28
|
SM Bus |
| 010 1100 |
0x2C
|
SM Bus |
| 011 0111 |
0x37
|
SM Bus |
| 100 00XX |
0x40 - 0x43
|
SM Bus |
| 100 0100 |
0x44
|
SM Bus |
| 110 0001 |
0x61
|
SM Bus |
| 111 1XXX |
0x78 - 0x7F
|
I2C and SMBUS |