Hitachi HM6116ZP-4 CMOS RAM Datasheet - Electronic Circuits Projects Diagrams Free

**Krumlink** · 15th March 2008, 11:41 PM

Anybody got a datasheet for Hitachi HM6116ZP-4 CMOS RAM

http://www.goldmine-elec-products.co...?number=G14750

Hitachi 2048-word x 8-bit high speed CMOS static RAM. These have been discontinued years ago but there are still many circuits that use them. We have a very limited quantity. Prime Hitachi branded!

Features:
Single 5V supply
High Speed: Fast access time
Directly TTL compatible
Equal access and cycle time
Completely static RAM: No clock or timing strobe required

24 pin DIP.
G14750

I was going to purchase one, but I would like to look at teh datasheet first.

Pommie · 16th March 2008, 03:38 AM

The 6116 is pretty much a generic chip and so any data sheet will do. Googleing 6116 gives this which should tell you everything you need to know.

What are you thinking of using it for?

Mike.

**Krumlink** · 16th March 2008, 04:03 AM

Wow pommie THANK YOU SO MUCH!!!!!

I am using this for the relay computer's memory RAM. It will be easy to interface it.

**Krumlink** · 16th March 2008, 04:58 AM

I am going to need help to understand this. So to program this, how would I do that? Would I send it into the A bus or the I/O bus?

Pommie · 16th March 2008, 06:49 AM

To access the 6116 you need to setup the 11 address lines and the data lines. You then either set /wr and /cs low to write the location or /oe and /cs low to read it. It is ideal for a relay computer as there is no multiplexed busses and 2k is probably more than enough memory. To connect it to a pic would require most of the pic I/O and so would be a bad choice.

Mike.

ericgibbs · 16th March 2008, 07:42 AM

Quote:

Originally Posted by Pommie

To access the 6116 you need to setup the 11 address lines and the data lines. You then either set /wr and /cs low to write the location or /oe and /cs low to read it. It is ideal for a relay computer as there is no multiplexed busses and 2k is probably more than enough memory. To connect it to a pic would require most of the pic I/O and so would be a bad choice.

Mike.

G'Day Mike,
What he could do is to use a 8255 PIO between the PIC and the [static] 6116 RAM.
As the 'relay' computer will be slow, the PIO setup/loading shouldnt slow things down.
Krumlink, Google for a 8255 PIO datasheet.

Pommie · 16th March 2008, 10:00 AM

Quote:

Originally Posted by ericgibbs

G'Day Mike,
What he could do is to use a 8255 PIO between the PIC and the [static] 6116 RAM.
As the 'relay' computer will be slow, the PIO setup/loading shouldnt slow things down.
Krumlink, Google for a 8255 PIO datasheet.

Gday Eric,

Aren't you in effect multiplexing thing by using an 8255. The simplicity of the non multiplexed bus is a definite advantage if your building a relay computer. Also, the fact that you will need ram in order to access the 8255 makes it doubly not a good idea.

Mike.

ericgibbs · 16th March 2008, 10:43 AM

Hi Mike,
I have used the 8255 as an expander in the past with good results.

Ref attached image.

A more elegant way, would be a serial/I2C Ram.

Krumlink.
Any chance of a block diagram of the 'relay' circuit.?

Pommie · 16th March 2008, 11:22 AM

Hi Eric,

Using an 8255 with a pic chip to access a 6116 would be the way to go. For a relay computer I think it would actually complicate matters. Assuming that the Harvard architecture would be the simplest to implement in relays, then having ram and rom on the simplest busses would be the way to do it.

To use any serial eeprom would further complicate matters and again would require other ram in order to implement it. You would require a loadable address counter + a bit counter, not to mention some way to shift the address out.

I'm assuming that a relay computer would have rom/ram for code, ram for variables, no stack and switches/leds for I/O.

Mike.

ericgibbs · 16th March 2008, 11:56 AM

hi Mike,
I thought Krumlink was making a pseudo 'relay' computer by using a PIC, this appears to be an incorrect conclusion.

You are burning the midnight oil again.

Regards

Pommie · 16th March 2008, 12:02 PM

Quote:

Originally Posted by ericgibbs

hi Mike,
I thought Krumlink was making a pseudo 'relay' computer by using a PIC, this appears to be an incorrect conclusion.

He appears to want to build a true relay computer. Good luck I say.
You are burning the midnight oil again.

Regards

Naaarh, only 10pm here.

Mike.

**Nigel Goodwin** · 16th March 2008, 01:01 PM

Quote:

Originally Posted by ericgibbs

Hi Mike,
I have used the 8255 as an expander in the past with good results.

But the 8255 is a really limited 'horrible' device, there are MUCH better PIO chips available (like the 6522 for a start).

But considering this is supposed to be for a 'relay computer', isn't the memory supposed to made of relays? - isn't that the point?.

Pommie · 16th March 2008, 01:08 PM

Quote:

Originally Posted by Nigel Goodwin

But considering this is supposed to be for a 'relay computer', isn't the memory supposed to made of relays? - isn't that the point?.

That should indeed be the point. However, if you look at the link I posted on the other relay computer thread then the relay computer is the ALU and associated address/data busses. The actual memory used was silicon. Even with silicon memory the thing was still huge and not something I would like to attempt building. If you did do relay memory then you are going to be pushing the envelope at 256 bytes.

Mike.

**Nigel Goodwin** · 16th March 2008, 01:59 PM

Quote:

Originally Posted by Pommie

That should indeed be the point. However, if you look at the link I posted on the other relay computer thread then the relay computer is the ALU and associated address/data busses. The actual memory used was silicon. Even with silicon memory the thing was still huge and not something I would like to attempt building. If you did do relay memory then you are going to be pushing the envelope at 256 bytes.

Well based on past experience, I don't think there's a chance he's going to build it anyway!

Pommie · 16th March 2008, 02:18 PM

We were all that enthusiastic once and shouldn't knock it. However, your probably right.

Mike.

15th March 2008, 11:41 PM	(permalink)
Krumlink Moderator Blog Entries: 1	Hitachi HM6116ZP-4 CMOS RAM Datasheet Anybody got a datasheet for Hitachi HM6116ZP-4 CMOS RAM http://www.goldmine-elec-products.co...?number=G14750 Hitachi 2048-word x 8-bit high speed CMOS static RAM. These have been discontinued years ago but there are still many circuits that use them. We have a very limited quantity. Prime Hitachi branded! Features: Single 5V supply High Speed: Fast access time Directly TTL compatible Equal access and cycle time Completely static RAM: No clock or timing strobe required 24 pin DIP. G14750 I was going to purchase one, but I would like to look at teh datasheet first. __________________ MechTronics

16th March 2008, 04:03 AM	(permalink)
Krumlink Moderator Blog Entries: 1	Wow pommie THANK YOU SO MUCH!!!!! I am using this for the relay computer's memory RAM. It will be easy to interface it. __________________ MechTronics

16th March 2008, 04:58 AM	(permalink)
Krumlink Moderator Blog Entries: 1	I am going to need help to understand this. So to program this, how would I do that? Would I send it into the A bus or the I/O bus? __________________ MechTronics

16th March 2008, 11:56 AM	(permalink)
ericgibbs Experienced Member	hi Mike, I thought Krumlink was making a pseudo 'relay' computer by using a PIC, this appears to be an incorrect conclusion. You are burning the midnight oil again. Regards __________________ Eric "Good enough is Perfect" PIC tutorials: Nigel's: www.winpicprog.co.uk/ Gramo's: www.digital-diy.net/ Bill's: www.blueroomelectronics.com/

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16th March 2008, 03:38 AM	(permalink)
Pommie Experienced Member	The 6116 is pretty much a generic chip and so any data sheet will do. Googleing 6116 gives this which should tell you everything you need to know. What are you thinking of using it for? Mike.

16th March 2008, 06:49 AM	(permalink)
Pommie Experienced Member	To access the 6116 you need to setup the 11 address lines and the data lines. You then either set /wr and /cs low to write the location or /oe and /cs low to read it. It is ideal for a relay computer as there is no multiplexed busses and 2k is probably more than enough memory. To connect it to a pic would require most of the pic I/O and so would be a bad choice. Mike.

16th March 2008, 11:22 AM	(permalink)
Pommie Experienced Member	Hi Eric, Using an 8255 with a pic chip to access a 6116 would be the way to go. For a relay computer I think it would actually complicate matters. Assuming that the Harvard architecture would be the simplest to implement in relays, then having ram and rom on the simplest busses would be the way to do it. To use any serial eeprom would further complicate matters and again would require other ram in order to implement it. You would require a loadable address counter + a bit counter, not to mention some way to shift the address out. I'm assuming that a relay computer would have rom/ram for code, ram for variables, no stack and switches/leds for I/O. Mike.

16th March 2008, 02:18 PM	(permalink)
Pommie Experienced Member	We were all that enthusiastic once and shouldn't knock it. However, your probably right. Mike.

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