Texas Instruments TMS320TCI648x manual Port Response Time-Out Control CSR Sprtctl

Models: TMS320TCI648x

1 256
Download 256 pages 4.34 Kb
Page 198
Image 198

www.ti.com

SRIO Registers

5.67 Port Response Time-Out Control CSR (SP_RT_CTL)

The port response time-out control CSR (SP_RT_CTL) is shown in Figure 130 and described in Table 138 For additional programming information, see Section 2.3.3.3 and Section 2.3.3.

Figure 130. Port Response Time-Out Control CSR (SP_RT_CTL) - Address Offset 1124h

31

TIMEOUT_VALUE

RW-FFFFFFh

8

7

0

TIMEOUT_VALUE

 

Reserved

RW-FFFFFFh

 

R-00h

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

Table 138. Port Response Time-Out Control CSR (SP_RT_CTL) Field Descriptions

Bit

Field

Value

Description

31–8

TIMEOUT_VALUE

000000h

Timeout value for all ports on the device. This timeout is for sending a packet to

 

 

to

receiving the corresponding response packet. Max value represents 3 to 6

 

 

FFFFFFh

seconds. The timeout duration can be expressed as:

 

 

 

Timeout = 15 x ((Prescale Value + 1) x DMA Clock Period x Timeout Value)

 

 

 

where Prescale value is set in PER_SET_CNTL (offset 0020h) and the Timeout

 

 

 

value is the decimal representation of this register value. For example, given a

 

 

 

400-MHz DMA, a Prescale Value of 4, and a Timeout Value of FFFFFFh, the

 

 

 

Timeout duration would be:

 

 

 

Timeout = 15 x ((4 + 1) x 2.5 ns x 16777216) = 3.15 s

7–0

Reserved

00h

These read-only bits return 0s when read.

198

Serial RapidIO (SRIO)

SPRUE13A –September 2006

Submit Documentation Feedback

Page 198
Image 198
Texas Instruments TMS320TCI648x manual Port Response Time-Out Control CSR Sprtctl