Alignment and Poison Configuration

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

Document ID
UG1085
Release Date
2022-09-15
Revision
2.3 English

The recommended bit settings for the XMPU alignment and poisoning configurations are listed in Table: XMPU Configuration Table with poison attribute and base settings. The DDR and OCM memory controllers expect attribute poisoning when the AXI transaction is disallowed by an XMPU. The FPD XMPU must poison the transaction so it is steered to the XMPU sink unit.

Table 16-7:      XMPU Configuration Table

Register Bit Field
Bit Field Type
Bit Field Meaning

CTRL [AlignCfg]
Read-only
1 = 1 MB
0 = 4 KB

CTRL [PoisonCfg]
R/W, reset value
0 = attribute
1 = address

POISON [ATTRIB]
R/W, reset value
AxUser bit

POISON [BASE]
Read-only
Address bits [31:12]

6 XMPUs on DDR

1

0

0

~

1 XMPU on OCM

0

0

0

~

1 XMPU on FPD

0

1

~

20’h FD4F0