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3.8 Transmit Address Map Register (XAM)
3.9 Receive Address Map Size 1 Register (RAMS1)
VLYNQ Port Registers
The transmit address map register (XAM) is used to translate transmit packet addresses to remote device
configuration bus addresses. The XAM is shown in Figure 16 and described in Table 14 .
Figure 16. Transmit Address Map Register (XAM)
31 2 1 0
TXADRMAP Reserved
R/W-0 R-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 14. Address Map Register (XAM) Field Descriptions
Bit Field Value Description
31-2 TXADRMAP 0-3FFF FFFFh This field is subtracted from the slave configuration bus address [25:0] to obtain the zero
relative transmit packet address. This field should be programmed with a value of 0 (reset
value).
1-0 Reserved 0 Reserved.
The receive address map size 1 register (RAMS1) is used to identify the intended destination of inbound
serial packets. The RAMS1 is shown in Figure 17 and described in Table 15 .
Figure 17. Receive Address Map Size 1 Register (RAMS1)
31 2 1 0
RXADRSIZE1 Reserved
R/W-0 R-0
LEGEND: R/W = Read/Write; R = Read only; - n = value after reset
Table 15. Receive Address Map Size 1 Register (RAMS1) Field Descriptions
Bit Field Value Description
31-2 RXADRSIZE1 0-3FFF FFFFh The RXADRSIZE1 field is used to determine if receive packets are destined for the first of
four mapped address regions. RXADRSIZE1 is compared with the address contained in the
receive packet. If the received packet address is less than the value in RXADRSIZE1, the
packet address is added to the receive address map offset 1 register (RAMO1) to obtain the
translated address.
1-0 Reserved 0 Reserved.
SPRUF89 – October 2007 VLYNQ Port 33
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