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參數(shù)資料
| 型號： | IA2910A-PLC44C |
| 廠商： | Innovasic Semiconductor |
| 英文描述： | Microprogram Controller |
| 中文描述： | 微程序控制器 |
| 文件頁數(shù)： | 2/19頁 |
| 文件大?。?/td> | 162K |
| 代理商： | IA2910A-PLC44C |
Page 2 of 19
I
A2910A
Microprogram Controller
The IA2910A is a form, fit and function compatible part to the AMD 2910A microprogram
controller. The IA2910A is an address controller which will sequence through a series of
microinstructions contained in a ROM or PROM. There are four sources of addresses from which
the IA2910A may select. The first is a direct data bus (DIN) input, which is straightforward. The
second is an internal address register. This register contains data loaded during a previous
microinstruction. The third source is a program counter register, which generally contains the
previous address incremented by one. The final source of addresses is a nine word deep stack
register which gives the capability to execute nested subroutine linkages. All internal registers are
clocked on the rising edge of the clock input (CLK). An OEn input enables the YOUT output bus
to be tri-stated. A
block diagram is shown in Figure 1.
Preliminary
Data Sheet
Copyright
1999, InnovASIC Inc.
Customer SpecficIC Soutions
Functional Block Diagram
Figure 1
Register/Counter
Instruction
PLA
Zero
Detector
Microprogram
counter-register
Mux
Incrementer
9 word X 12 Bit
Stack
Stack Pointer
12
YOUT
RLDn
DIN
CCn
CCENn
I(3:0)
P
M
V
CIN
CLK
FULLn
S
R
D
H
PUSH/POP/
HOLD/CLEAR
CLEAR/COUNT
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