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Integrated Device Technology Electronic Components Datasheet

IDT39C10C Datasheet

12-Bit CMOS Microprogram Sequencer

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MICROSLlCpM PRODUCT
FEATURES:
• Low-power CEMOS'·
-Icc (max.)
Military - 90mA
Commercial - 75mA
• Fast
-IDT39C10B matches 2910A speeds
-IDT39C10C 30% speed upgrade
• 33-Deep stack
-Accommodates highly nested loops and subroutines
microcode
• 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,
Class B
DESCRIPTION:
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.
II
FUNCTIONAL BLOCK DIAGRAM
0, CP
RLD 0 - - - - - - - - 1
FUll
DECREMENTI
HDLD/LOAD
CC
CCEN L-r--.....-
R=O
0Ec=>----~-~-~----~
Pi: MAP VECT
v,
MICROSLICE and CEMOS are trademarks of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
~ 1986 Integrated Device Technology, Inc.
3-61
c,
IDT39C10B-001
JUNE 1986
Printed In U.S.A.


Integrated Device Technology Electronic Components Datasheet

IDT39C10C Datasheet

12-Bit CMOS Microprogram Sequencer

No Preview Available !

IDT38C10B/C 12-BIT CMOS MICROPROGRAM SEQUENCER
PIN CONFIGURATIONS
Y4 D3
D4 Y3
Ys D2
VE§f
p[
ir.iP
~~
~
Do
13 YO
12 CI
VCe CP
11 GND
10 OE
CCiN
CC
Y11
D11
iiLD
PUll.
Y10
D10
D, Y,
Y, De
Dr Y,
Yr --"""-_ _~- De
DIP
TOP VIEW
IOT39C1OB-002
PIN FUNCTIONS
PIN NAME
01
Ii
CC
CCEN
CI
RLD
OE
CP
Vee
GND
DESCRIPTION
Direct Input Bit i
Instruction Bit I
Condition Code
Condition Code
Enable
Carry-In
Register Load
Output Enable
Clock Pulse
5 Volts
Ground
FUNCTION
Direct input to register/counter
and multiplexer Do is LSB.
Selects one-ol-sixteen
instructions.
Used as test criterion. Pass test is
a LOW on CC.
Whenever the Signal is HIGH, CC
Is ignored and the part operates
as though CC were true (LOW).
Low order carry input to incre-
menter lor microprogram counter.
When LOW lorces loading 01
register/counter regardless 01
Instruction or condition.
Three-state control 01 Vi outputs.
Triggers all internal state changes
at LOW-to-HIGH edge.
VI
FULL
PL
MAP
VECT
Microprogram
Address Bit i
Full
Pipeline Address
Enable
Map Address
Enable
Vector Address
Enable
Address to microprogram
memory. Vo is LSB, V'1 Is MSB.
Indicates that 33 items are on the
stack.
Can select #1 source (usually
Pipeline Register) as direct input
source.
Can select #2 source (usually
Mapping PROM or PLA) as direct
input source.
Can select #3 source (lor exam-
pie, Interrupt Starting Address) as
direct input source.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
p[
;.ms
13
12
Vee
11
---'.I!
CCEN
CC
RLD
NC
LCC
TOP VIEW
Y1
Do
Yo
NC
CI
CP
GND
NC
OE
Y11
D11
IDT39C10B-003
3-62


Part Number IDT39C10C
Description 12-Bit CMOS Microprogram Sequencer
Maker IDT
Total Page 10 Pages
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