Operation
Built-In Test Support
Core1553BRT provides a BIT word. This is used to communicate fail information back to the bus
controller. The BIT word contains the information in Table 5-6 .
Table 5-6 ? BIT Word
Bit(s)
15
14
13
12
11
10
9
8
7
6
5
4:0
Function
BUSINUSE
LPBKERRB
LPBKERRA
SHUTDOWNB
SHUTDOWNA
TFLAGINH
WCNTERR
MANERR
PARERR
RTRTTO
MEMFAIL
VERSION
Description
Indicates on which bus the transmit BIT word command was received:
0: Bus A
1: Bus B
Indicates that the loopback logic detected an error on the transmitted data for
bus B. This bit is cleared by the CLRERR input.
Indicates that the loopback logic detected an error on the transmitted data for
bus A. This bit is cleared by the CLRERR input.
Indicates that bus B is shut down. This occurs after a “transmitter shutdown”
mode code is received or the hardware timer detected that the core
transmitted for longer than 668 μs on bus B.
Indicates that bus A is shut down. This occurs after a “transmitter shutdown”
mode code is received or the hardware timer detected that the core
transmitted for longer than 668 μs on bus A.
Terminal flag inhibit setting
A word count error has occurred. This bit is cleared by the CLRERR input.
A Manchester encoding error has occurred. This bit is cleared by the
CLRERR input.
A parity error has occurred. This bit is cleared by the CLRERR input.
The transmitting RT did not provide data on RT-to-RT transfer. This bit is
cleared by the CLRERR input.
The backend memory interface failed to complete an access within the
required time. This bit is cleared in the CLRERR input.
Indicates the core version:
'00001': version 2.0
'00010': version 2.1
'00011': version 2.12
'00100': version 2.2
'00101': version 2.21
'01000': version 3.0
'01001': version 3.1
'01010': version 3.2
'01011': version 3.3
'01100': version 3.4
'01101': version 4.0
Revision 3
34
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