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− | The '''GI SBA''' (''' | + | {{gi title|SBA}} |
+ | {{ic family | ||
+ | | title = GIM SBA | ||
+ | | image = <!-- Image representation of the IC family, e.g. "MCS-4.jpg" --> | ||
+ | | caption = <!-- description of the image --> | ||
+ | | developer = General Instrument | ||
+ | | manufacturer = General Instrument | ||
+ | | type = microcontrollers | ||
+ | | production start = November, 1977 | ||
+ | | production end = | ||
+ | | arch = 1-bit | ||
+ | | isa = SBA | ||
+ | | word = 1 bit | ||
+ | | proc = <!-- process, e.g. "8 μm" --> | ||
+ | | tech = nMOS | ||
+ | | clock min = 10 kHz | ||
+ | | clock max = 800 kHz | ||
+ | | package = DIP40 | ||
+ | }} | ||
+ | The '''GI SBA''' ('''Sequential Boolean Analyzer''') was a [[microprocessor family|family]] of {{arch|1}} [[microcontroller]]s developed by [[General Instrument|General Instrument's Microelectronics]] division. These microcontrollers served as cheap [[programmable logic controller]]s, replacing old relay system. | ||
+ | |||
+ | == Members == | ||
+ | {| class="wikitable sortable" | ||
+ | |- | ||
+ | ! Part !! [[RAM]] !! [[ROM]] !! I/O Ports !! Notes | ||
+ | |- | ||
+ | | {{\|SBA}} || 120x1 bits || 1024x8 bits || 31 || | ||
+ | |- | ||
+ | | {{\|SBA-1}} || 120x1 bits || || 31 || external storage | ||
+ | |- | ||
+ | | {{\|SBA-2}} || 120x1 bits || 2048x8 bits || 31 || ?ever released? | ||
+ | |} | ||
+ | |||
+ | == Architecture == | ||
+ | The SBA family had a large number (over 30) of I/O ports that could all be individually accessed programatically. Additionally, it had a relatively complex scheme of data storage. In total there were 120 words (1-bit each). This was broken down into 4 pages of 30 addresses each. The program had to choose which page it was working with currently and once that was done, any address selection was done on that page. | ||
+ | |||
+ | {{expand section}} | ||
+ | === ISA === | ||
+ | {{main|general_instrument/sba/isa|l1=SBA ISA}} | ||
+ | The SBA family had 8-bit instructions consisting of instructions with immediate and without [[immediate value]]s. In total there were 24 instructions used for arithmetic, I/O, and page switching. | ||
{{stub}} | {{stub}} | ||
− |
Latest revision as of 00:33, 19 May 2016
GIM SBA | |
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Developer | General Instrument |
Manufacturer | General Instrument |
Type | microcontrollers |
Production | November, 1977 |
Architecture | 1-bit |
ISA | SBA |
Word size | 1 bit 0.125 octets
0.25 nibbles |
Technology | nMOS |
Clock | 10 kHz-800 kHz |
Package | DIP40 |
The GI SBA (Sequential Boolean Analyzer) was a family of 1-bit microcontrollers developed by General Instrument's Microelectronics division. These microcontrollers served as cheap programmable logic controllers, replacing old relay system.
Members[edit]
Part | RAM | ROM | I/O Ports | Notes |
---|---|---|---|---|
SBA | 120x1 bits | 1024x8 bits | 31 | |
SBA-1 | 120x1 bits | 31 | external storage | |
SBA-2 | 120x1 bits | 2048x8 bits | 31 | ?ever released? |
Architecture[edit]
The SBA family had a large number (over 30) of I/O ports that could all be individually accessed programatically. Additionally, it had a relatively complex scheme of data storage. In total there were 120 words (1-bit each). This was broken down into 4 pages of 30 addresses each. The program had to choose which page it was working with currently and once that was done, any address selection was done on that page.
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This section requires expansion; you can help adding the missing info. |
ISA[edit]
- Main article: SBA ISA
The SBA family had 8-bit instructions consisting of instructions with immediate and without immediate values. In total there were 24 instructions used for arithmetic, I/O, and page switching.
![]() |
This article is still a stub and needs your attention. You can help improve this article by editing this page and adding the missing information. |
designer | General Instrument + |
full page name | general instrument/sba + |
instance of | microcontroller family + |
instruction set architecture | SBA + |
main designer | General Instrument + |
manufacturer | General Instrument + |
name | GIM SBA + |
package | DIP40 + |
technology | nMOS + |
word size | 1 bit (0.125 octets, 0.25 nibbles) + |