
8
Data Device Corporation
www.ddc-web.com
BU-65170/61580/61585
H1 web-09/02-0
COMMAND STACK POINTER 0
0(LSB)
COMMAND STACK POINTER 15
15(MSB)
DESCRIPTION
BIT
TABLE 7. BC/RT COMMAND STACK POINTER REG. (READ 03H)
RT-RT FORMAT
BROADCAST FORMAT
MODE CODE FORMAT
1553A/B SELECT
0(LSB)
1
2
3
EOM INTERRUPT ENABLE
4
MASK BROADCAST BIT
5
OFF LINE SELF TEST
6
BUS CHANNEL A/B
7
RETRY ENABLED
8
RESERVED BITS MASK
SUBSYS FLAG BIT MASK
TERMINAL FLAG BIT MASK
11
10
SUBSYS BUSY BIT MASK
12
SERVICE REQUEST BIT MASK
13
M.E. MASK
14
RESERVED
15(MSB)
DESCRIPTION
BIT
BCST: MEMORY MANAGEMENT 0 (MM0)
0(LSB)
BCST: MEMORY MANAGEMENT 1 (MM1)
1
BCST:MEMORY MANAGEMENT 2 (MM2)
2
TX: MEMORY MANAGEMENT 1 (MM1)
BCST: CIRC BUF INT
3
BCST: EOM INT
4
RX: MEMORY MANAGEMENT 0 (MM0)
5
RX: MEMORY MANAGEMENT 1 (MM1)
6
RX: MEMORY MANAGEMENT 2 (MM2)
7
RX: CIRC BUF INT
8
RX: EOM INT
9
TX: MEMORY MANAGEMENT 0 (MM0)
10
TX: MEMORY MANAGEMENT 2 (MM2)
12
TX: CIRC BUF INT
13
TX: EOM INT
14
RX: DOUBLE BUFFER ENABLE
15(MSB)
DESCRIPTION
BIT
11
TABLE 9. RT SUBADDRESS CONTROL WORD
(READ/WRITE 04H)
TIME TAG 0
0(LSB)
TIME TAG 15
15(MSB)
DESCRIPTION
BIT
TABLE 10. TIME TAG REGISTER (READ/WRITE 05H)
END OF MESSAGE
0(LSB)
BC STATUS SET/RT MODE CODE/MT PATTERN
TRIGGER
1
FORMAT ERROR
2
MT COMMAND STACK ROLLOVER
BC END OF FRAME
3
BC CONTROL WORD/RT SUBADDRESS CONTROL WORD EOM
4
RT CIRCULAR BUFFER ROLLOVER
5
TIME TAG ROLLOVER
6
RT ADDRESS PARITY ERROR
7
BC RETRY
8
HS FAIL
9
MT DATA STACK ROLLOVER
10
BC/RT COMMAND STACK ROLLOVER
12
BC/RT TRANSMITTER TIMEOUT
13
RAM PARITY ERROR
14
MASTER INTERRUPT
15(MSB)
DESCRIPTION
BIT
11
TABLE 11. INTERRUPT STATUS REGISTER (READ 06H)
ENHANCED MODE CODE HANDLING
0(LSB)
1553A MODE CODES ENABLE
1
RTFAIL-FLAG WRAP ENABLE
2
MT COMMAND STACK SIZE 0
BUSY RX TRANSFER DISABLE
3
ILLEGAL RX TRANSFER DISABLE
4
ALTERNATE STATUS WORD ENABLE
5
OVERRIDE MODE T/R ERROR
6
ILLEGALIZATION DISABLED
7
MT DATA STACK SIZE 0
8
MT DATA STACK SIZE 1
9
MT DATA STACK SIZE 2
10
MT COMMAND STACK SIZE 1
12
BC/RT COMMAND STACK SIZE 0
13
BC/RT COMMAND STACK SIZE 1
14
ENHANCED MODE ENABLE
15(MSB)
DESCRIPTION
BIT
11
TABLE 12. CONFIGURATION REGISTER #3 (READ/WRITE 07H)
TABLE 8. BC CONTROL WORD REGISTER
READ/WRITE 04H, (BU-61580 ONLY)