RTI-9
1.4 MIL-STD-1553B Subaddress and Mode Code Definitions
1.5 Remote Terminal Address
Assign the RTI remote terminal address by either a software
or hardware exercise. The host assigns the RTI remote
terminal address by performing a Control Register write;
the Terminal Address bus (TA(4:0)) is strobed into the RTI
Remote Terminal Address Register upon completion of the
Control Register write. To assign the RTI remote terminal
address via hardware, use the TALEN/PARITY input pin
operating in the terminal latch address enable mode. The
Terminal Address bus is latched into the RTI while the
TALEN is asserted (i.e., logic low). Valid remote terminal
addresses (RTA) include decimal 0 through 31 if Broadcast
is disabled, 0 through 30 if Broadcast is enabled
Parity Checker
An address parity check is performed to insure the remote
terminal address applied to TA(4:0) was properly latched
into the Remote Terminal Address Register. To perform a
parity check, enable the RTI parity circuit via EXT TEST
and EXT TST CH SEL A/B input pins. The parity bit is
entered through the TALEN/PARITY input pin operating in
the parity mode. Input pins EXT TEST and EXT TST CH
SEL A/B control dual-function input pin TALEN/PARITY;
see table 2 for description of operation.
If a parity error exists, the Parity Error bit of the System
Register is set to a logic one, biphase Channels A and B are
disabled (set to logic zero), the Message Error bit set to logic
one, and the message error pin is asserted.
Table 1. Subaddress and Mode Code Definitions Per MIL-STD-1553B
Subaddress Field
Binary (Decimal)
Message Format
Receive
Transmit
Description
00000 (00)
1
1
Mode Code Indicator
00001 (01)
User Defined
User Defined
00010 (02)
User Defined
User Defined
00011 (03)
User Defined
User Defined
00100 (04)
User Defined
User Defined
00101 (05)
User Defined
User Defined
00110 (06)
User Defined
User Defined
00111 (07)
User Defined
User Defined
01000 (08)
User Defined
User Defined
01001 (09)
User Defined
User Defined
01010 (10)
User Defined
User Defined
01011 (11)
User Defined
User Defined
01100 (12)
User Defined
User Defined
01101 (13)
User Defined
User Defined
01110 (14)
User Defined
User Defined
01111 (15)
User Defined
User Defined
10000 (16)
User Defined
User Defined
10001 (17)
User Defined
User Defined
10010 (18)
User Defined
User Defined
10011 (19)
User Defined
User Defined
10100 (20)
User Defined
User Defined
10101 (21)
User Defined
User Defined
10110 (22)
User Defined
User Defined
10111 (23)
User Defined
User Defined
11000 (24)
User Defined
User Defined
11001 (25)
User Defined
User Defined
11010 (26)
User Defined
User Defined
11011 (27)
User Defined
User Defined
11100 (28)
User Defined
User Defined
11101 (29)
User Defined
User Defined
11110 (30)
User Defined
User Defined
11111 (31)
1
1
Mode Code Indicator
Note:
1. Refer to mode code assignments per MIL-STD-1553B