• Low-power CEMOS'·
Military - 90mA
Commercial - 75mA
-IDT39C10B matches 2910A speeds
-IDT39C10C 30% speed upgrade
• 33-Deep stack
-Accommodates highly nested loops and subroutines
• 12-bit address width
• 12-bit internal loop counter
• 16 powerful microinstructions
• 3 enables control branch address sources
• Available in 40-pin DIP and 44-pin LCC
• Military product available 100% screened to MIL-STD-883,
The IDT39C10 microprogram sequencers are designed for use
in high-performance microprogram state machines. These micro-
program sequencers are intended for use in controlling the
sequence of microinstructions executed in the microprogram
memory. The IDT39C10s provide several conditional branch
instructions that allow branching to any microinstruction within
the4K microword address space. A 33-deep last-in, first-out stack
provides for a very powerful microprogram subroutine return
linkage and looping capability. With this depth of a micropro-
gram return stack, the microprogrammer has maximum flexibil-
ity in nesting subroutines and loops. The counter contained in
the IDT39C10s provides for microinstruction loop counts of up to
4096, in terms of total count length.
The IDT39C10s provide a 12-bit address to the microprogram
memory. This microprogram sequencer selects one of four
sources for the address: these are (1) the microprogram address
register, (2) external direct input, (3) internal register counter, and
(4) the 33-deep LIFO stack. The microprogram counter usually
contains an address that is one greater than the microinstruction
currently being executed in the microprogram pipeline register.
The IDT39C10s are fabricated using CEMOS, a single-poly
double metal CMOS technology designed for high-performance
and high-reliability. The devices are pin-compatible, performance-
enhanced, functional replacements for the 2910A.
FUNCTIONAL BLOCK DIAGRAM
RLD 0 - - - - - - - - 1
Pi: MAP VECT
MICROSLICE and CEMOS are trademarks of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
~ 1986 Integrated Device Technology, Inc.
Printed In U.S.A.