Texas Instruments SPRU938B Receive Address Map Size 4 Register RAMS4, RXADRSIZE4, RXADROFFSET4

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VLYNQ Port Registers

3.15 Receive Address Map Size 4 Register (RAMS4)

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.

3.16 Receive Address Map Offset 4 Register (RAMO4)

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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