Core1553BRT-EBR Enhanced Bit Rate 1553 Remote Terminal
Built-In Test Support
The Core1553BRT-EBR provides a BIT word. This is used to communicate fail information back to the bus controller. The
BIT word contains the information in Table 12.
Table 12 • BIT Word
Bit(s)
Function
Description
15
BUSINUSE
Indicates on which bus the transmit BIT word command was received
'0': Bus A '1': Bus B
14
13
12
11
LPBKERRB
LPBKERRA
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.
SHUTDOWNB Indicates that Bus B is shutdown. This occurs after a transmitter shutdown mode code is received or the
hardware timer detected that the core transmitted for greater than 668 µs on Bus B.
SHUTDOWNA Indicates that Bus A is shutdown. This occurs after a transmitter shutdown mode code is received or the
hardware timer detected that the core transmitted for greater than 668 µs on Bus A.
10
9
TFLAGINH
WCNTERR
MANERR
PARERR
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.
Set to '0'
8
7
6
Reserved
MEMFAIL
5
The backend memory interface failed to complete an access within the required time. This bit is cleared in the
CLRERR input.
4:0
VERSION
Indicates the core version
'01000': EBR version 1.0 (pre-production)
'01001': EBR version 2.0
Advanced v1.1
17
ACTEL [ Actel Corporation ]
