UPSD3312D-40U6 datasheet(18/231 Pages) STMICROELECTRONICS

18 / 231 page

uPSD33xx

18/231

Figure 7. Comparison of uPSD33xx with Standard 8032 Performance

Figure 8. Instruction Pre-Fetch Queue and Branch Cache

MCU Clock

Standard 8032

Fetch Byte for Instruction A

Execute Instruction A

and Fetch a Second Dummy Byte

Turbo uPSD33XX

Execute Instruction and

Pre-Fetch Next Instruction

4 clocks (one machine cycle)

12 clocks (one machine cycle)

1-byte, 1-Cycle Instructions

Dummy Byte is Ignored (wasted bus access)

Execute Instruction and

Pre-Fetch Next Instruction

Execute Instruction and

Pre-Fetch Next Instruction

Instruction A

Instruction B

Instruction C

Instruction A

Turbo uPSD33XX executes instructions A, B, and C in the same

amount of time that a standard 8032 executes only instruction A.

one machine cycle

AI08808

Branch 4

Code

Branch 4

Code

Branch 4

Code

Branch 4

Code

Branch 4

Code

Branch 4

Code

Branch 4

8032

MCU

Program

Memory on

PSD Module

Instruction Pre-Fetch Queue (PFQ)

6 Bytes of Instruction

Instruction

Byte

Wait

Stall

Instruction

Byte

Current

Branch

Address

Compare

Branch

Cache

(BC)

AI08809

Address

Load on Branch Address Match

Branch 3

Code

Branch 3

Code

Branch 3

Code

Branch 3

Code

Branch 3

Code

Branch 3

Code

Branch 3

Branch 2

Code

Branch 2

Code

Branch 2

Code

Branch 2

Code

Branch 2

Code

Branch 2

Code

Branch 2

Branch 1

Code

Branch 1

Code

Branch 1

Code

Branch 1

Code

Branch 1

Code

Branch 1

Code

Branch 1

Address

UPSD3312D-40U6 Datasheet(PDF) 18 Page - STMicroelectronics

UPSD3312D-40U6 Datasheet(HTML) 18 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Descarga

Enlace URL