Texas Instruments TMS320TCI648x manual Port Local AckID Status CSR n SPnACKIDSTAT

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SRIO Registers

5.71 Port Local AckID Status CSR n (SPn_ACKID_STAT)

Each of the four ports is supported by a register of this type (see Table 144). The port local ackID status CSR n (SPn_ACKID_STAT) is shown in Figure 134 and described in Table 145.

Table 144. SPn_ACKID_STAT Registers and the Associated Ports

Register	Address Offset	Associated Port
SP0_ACKID_STAT	1148h	Port 0
SP1_ACKID_STAT	1168h	Port 1
SP2_ACKID_STAT	1188h	Port 2
SP3_ACKID_STAT	11A8h	Port 3

Figure 134. Port Local AckID Status CSR n (SPn_ACKID_STAT)

31	29	28	24	23			16
	Reserved		INBOUND_ACKID				Reserved
	R-0		R/W-0				R-0
15	13	12	8	7	3	4	0
	Reserved		OUTSTANDING_ACKID		Reserved		OUTBOUND_ACKID
	R-0		R/W-0		R-0		R/W-0

LEGEND: R/W = Read/Write; R = Read only; -n= Value after reset

Table 145. Port Local AckID Status CSR n (SPn_ACKID_STAT) Field Descriptions

Bit	Field	Value	Description
31–29	Reserved	0	These read-only bits return 0s when read.
28–24	INBOUND_ACKID	00000b–11111b	Input port next expected ackID value
23–13	Reserved	0	These read-only bits return 0s when read.
12–8	OUTSTANDING_ACKID	00000b–11111b	Output port unacknowledged ackID status. Next expected acknowledge
			control symbol ackID field that indicates the ackID value expected in the
			next received acknowledge control symbol.
7–5	Reserved	0	These read-only bits return 0s when read.
4–0	OUTBOUND_ACKID	00000b–11111b	Output port next transmitted ackID value. Software writing this value can
			force retransmission of outstanding unacknowledged packets in order to
			manually implement error recovery.

202 Serial RapidIO (SRIO) SPRUE13A –September 2006

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