VLYNQ Port User's Guide

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3.15 Receive Address Map Size 4 Register (RAMS4)
3.16 Receive Address Map Offset 4 Register (RAMO4)
VLYNQ Port Registers
The receive address map size 4 register (RAMS4) is used to identify the intended destination of inbound
serial packets. The RAMS4 is shown in Figure 23 and described in Table 20 .
Figure 23. Receive Address Map Size 4 Register (RAMS4)
31 2 1 0
RXADRSIZE4 Reserved
R/W-0 R-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 20. Receive Address Map Size 4 Register (RAMS4) Field Descriptions
Bit Field Value Description
31-2 RXADRSIZE4 0-3FFF FFFFh The RXADRSIZE4 field is used to determine if receive packets are destined for the fourth of
four mapped address regions. RXADRSIZE4 is compared with the address contained in the
receive packet. If the receive packet address is less than the value in RXADRSIZE4, the
packet address is added to the receive address map offset 4 register (RAMO4) to obtain the
translated address.
1-0 Reserved 0 Reserved. Always read as 0. Writes have no effect.
The receive address map offset 4 register (RAMO4) is used with the receive address map size 4 register
(RAMS4) to translate receive packet addresses to local device configuration bus addresses. The RAMS4
is shown in Figure 24 and described in Table 21 .
Figure 24. Receive Address Map Offset 4 Register (RAMO4)
31 2 1 0
RXADROFFSET4 Reserved
R/W-0 R-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 21. Receive Address Map Offset 4 Register (RAMO4) Field Descriptions
Bit Field Value Description
31-2 RXADROFFSET4 0-3FFF FFFFh The RXADROFFSET4 field is used with the receive address map size 4 register (RAMS4)
to determine the translated address for serial data. If the receive packet address is less
than the value in RAMS4, the packet address is added to the contents of this register to
obtain the translated address.
1-0 Reserved 0 Reserved. Always read as 0. Writes have no effect.
36 VLYNQ Port SPRU938B – September 2007
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