PI7C7300D datasheet(39/107 Pages) PERICOM

39 / 107 page

PI7C7300D

3-PORT PCI-TO-PCI BRIDGE

Page 39 of 107

Pericom Semiconductor

November 2005 - Revision 1.01

Normal termination (upon de-assertion of FRAME#)

Target retry

Target disconnect

Target abort

PI7C7300D handles these terminations in different ways, depending on the type of

transaction being performed.

4.9.3.1

DELAYED WRITE TARGET TERMINATION RESPONSE

When PI7C7300D initiates a delayed write transaction, the type of target termination

received from the target can be passed back to the initiator. Table 4-7 shows the response

to each type of target termination that occurs during a delayed write transaction.

PI7C7300D repeats a delayed write transaction until one of the following conditions is

met:

PI7C7300D completes at least one data transfer.

PI7C7300D receives a master abort.

PI7C7300D receives a target abort.

PI7C7300D makes 2

24 (default) or 232 (maximum) write attempts resulting in a response

of target retry.

Table 4-7 DELAYED WRITE TARGET TERMINATION RESPONSE

Target Termination

Response

Normal

Returning disconnect to initiator with first data transfer only if multiple data

phases requested.

Target Retry

Returning target retry to initiator. Continue write attempts to target

Target Disconnect

Returning disconnect to initiator with first data transfer only if multiple data

phases requested.

Target Abort

Returning target abort to initiator. Set received target abort bit in target interface

status register. Set signaled target abort bit in initiator interface status register.

After the PI7C7300D makes 2

24 (default) attempts of the same delayed write trans-action

on the target bus, PI7C7300D asserts P_SERR# if the SERR# enable bit (bit 8 of

command register for secondary bus S1 or S2) is set and the delayed-write-non- delivery

bit is not set. The delayed-write-non-delivery bit is bit 5 of P_SERR# event disable

description of system error conditions.

4.9.3.2

POSTED WRITE TARGET TERMINATION RESPONSE

When PI7C7300D initiates a posted write transaction, the target termination cannot be

passed back to the initiator. Table 4-8 shows the response to each type of target

termination that occurs during a posted write transaction.

Table 4-8 RESPONSE TO POSTED WRITE TARGET TERMINATION

Target Termination

Repsonse

Normal

No additional action.

Target Retry

Repeating write transaction to target.

Target Disconnect

Initiate write transaction for delivering remaining posted write data.

PI7C7300D датащи(PDF) 39 Page - Pericom Semiconductor Corporation

PI7C7300D датащи(HTML) 39 Page - Pericom Semiconductor Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL