Welcome to the Parallax Discussion Forums, sign-up to participate.

# How many transistors does the Prop have?

Posts: 3,880
edited 2009-11-29 - 17:40:52
The Penryn chip has 820,000,000 transistors. That's a lot!

How many are in the Propeller chip?

How many will be in the Prop II?

Rich H

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
The Simple Servo Tester, a kit from Gadget Gangster.

• Posts: 6,416
edited 2009-11-29 - 00:59:41
W9GFO,

I'm not at my desk right now to check, but I know the average transistor density for the Propeller II is about 1 transistor for every·2 square microns, so at 7mm square that works out to about 12,250,000 transistors.· Now, that's a little biased, since the last time I looked at the transistor density I was looking at the Propeller memories.

It really depends on the die size of the IC that you are refering to and what the average transistor density is.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
[url=mailto:bschwabe@parallax.com]Beau Schwabe[/url]

IC Layout Engineer
Parallax, Inc.

Beau Schwabe --- Robotics applications- PCB design, embedded software, and mechanical
Oklahoma Robotics -

www.Kit-Start.com - bschwabe@Kit-Start.com ෴෴ www.BScircuitDesigns.com - icbeau@bscircuitdesigns.com ෴෴

• Posts: 11,711
edited 2009-11-29 - 01:26:35
The current Propeller chip has around 3,000,000 transistors.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔

Chip Gracey
Parallax, Inc.
• Posts: 6,416
edited 2009-11-29 - 06:21:08
Here is a breakdown of the Prop II.· This does not take into account how many times each instance of the layout block will be used.

```Memories:
----------------------
MEM_COG:
Transistors = 344266
Area = 619008 um^2
MEM_DUALPORT:
Transistors = 44724
Area = 113005 um^2
MEM_RAM:
Transistors = 1673104
Area = 1736650 um^2
MEM_ROM:
Transistors = 303876
Area = 572428 um^2

Digital:
----------------------
FUNC_MUL_16x16:
Transistors = 11424
Area = 45260 um^2
FUNC_CORDIC:
Transistors = 16764
Area = 52650 um^2

Analog:
----------------------
FUSE_BIT:
Transistors = 49
Area = 953 um^2
PLL_MUL:
Transistors = 489
Area = 6988 um^2
OSC_SHELL:
Transistors = 158
Area = 32076 um^2
BOD_SHELL:
Transistors = 200
Area = 71703 um^2
PUD_SHELL:
Transistors = 152
Area = 106372 um^2

```

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
[url=mailto:bschwabe@parallax.com]Beau Schwabe[/url]

IC Layout Engineer
Parallax, Inc.

Beau Schwabe --- Robotics applications- PCB design, embedded software, and mechanical
Oklahoma Robotics -

www.Kit-Start.com - bschwabe@Kit-Start.com ෴෴ www.BScircuitDesigns.com - icbeau@bscircuitdesigns.com ෴෴

• Posts: 11,711
edited 2009-11-29 - 06:46:23
From Beau's data, it is evident that a 256Kb hub ROM is smaller than a 16Kb 4-port cog RAM. The ROM is over 16 times denser per bit of storage.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔

Chip Gracey
Parallax, Inc.
• Posts: 655
edited 2009-11-29 - 17:40:52
I'm not sure if this concept is implied, but in the time of transistor radios, sometimes they were labeled
as having a certain number, some of which had no active role in performance gain. And hypothetically,
if a subsection of the circuit could be made with less transistors, then the power consumed by more is a loss.

Imagine using 8 MPUs, 9 SRAMs, a PROM, and 2 PIO/PIA ... 20 chips as 1 Propeller.
You'd need more voltage and current, and run slow and Hot, and have a lot more transistors.