CT1611 Datasheet, PDF (12/24 Pages) Aeroflex Circuit Technology – DMA Controller with Buffer Memory,MIL-STD-1750A Compatible

Interface Mode
MODE 1 / MODE 0 → "0" is Motorola/Fairchild 9450 compatibility
"1" is Intel compatibility
M1 / M0
Write Operations
Read Operations
RDSTB / R/W → R/W
WTSTB / STRBD → STRBD
0
R/W = 0
STRBD =
- Same-
R/W = 1
STRBD =
RDSTB / R / W → RDSTB
WTSTB / STRBD → WTSTB
1
RDSTB = 0
WTSTB =
- Same-
RDSTB =
WTSTB = 1
Operational Commands
other than register reads and writes
Operation
Test Triggers - must be in test mode, otherwise no operation results
FIFO Reset
Test trigger (load)
Test trigger (unload)
Operational Triggers
Must be
in poll
mode
START POLL (from offset)
START POLL (from 0)
(resets offset reg.) Reg. Address 000E_H
CONTINUE POLL (from next address)
CONTINUOUS MODE- starts new poll
from beginning after "poll op cmplt" INTERRUPT
Non-CONTINUOUS - "poll op cmplt" INTERRUPT
- then no action
Note: Trigger (does not load new cmd WD (1) or transaction) generally
used for non chained poll, single transaction in polling mode. This
operation will repeat last, then continue.
Op Code (DS = 0)
X10100X XX28_H
X10000X
X10001X
X10010X
XX20_H
XX22_H
XX24_H
Resets Reset I resets interface only
Reset II same as master reset (hardware), also resets chip set
Note: All Operational Codes are Write Operations.
X10111X 2E_H
X10110X _2CH
SCDCT1611 Rev A
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