_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ CMOS Peripherals CDP1871A,CDP1871AC ~VDD , " t SliiFT J 38 1 CONTROL 4 37t--- ALPHA 3'5f-- DEBOUNCE 06-- 6 " 33 ............. DA f--32f-- BUS 7 31 BUS (; 3O~BUS" 29>-- BUS 4 2Bf-- BlJS 3 ::3::'-"'E"" 26 - BBUUSS2! ~~; 0 19 22 C52 20 21 e5i TOP VIEW TERMINAL ASSIGNMENT CMOS Keyboard Encoder Features: • Dir.
• Directly interfaces with COP1BOO-series microprocessors
• Low power dissipation
• 3-state outputs
• Scans and generates code for 53 key ASCII keyboard plus 32 HEX keys
(SPST mechanical contact switches)
• Shift, control, and alpha lock inputs
• RC-controlled debounce circuitry
• Single 4 to 10.5 V supply (COPIB71A); 4 to 6.5 V (COPIB71AC)
• N-key lockout
The RCA-CDP1871A is a keyboard encoder designed to directly interface between a CDP1800-series microprocessor and a mechanical keyboard array, providing up to 53 ASCII coded keys and 32 HEX coded keys, as shown in the system diagram (Fig. .
The CDP1871A is a keyboard encoder designed to directly interface between a CDP1800-series microprocessor and a mechanic.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | CDP1871A |
GE |
CMOS Keyboard Encoder | |
2 | CDP1871A |
Intersil Corporation |
CMOS Keyboard Encoder | |
3 | CDP1871 |
Intersil Corporation |
CMOS Keyboard Encoder | |
4 | CDP1870C |
ETC |
(CDP1869C - CDP1876C) Video Interface System | |
5 | CDP1872 |
Intersil Corporation |
High-Speed 8-Bit Input and Output Ports | |
6 | CDP1872C |
GE |
High-Speed 8-Bit Input and Output Ports | |
7 | CDP1872C |
Intersil Corporation |
High-Speed 8-Bit Input and Output Ports | |
8 | CDP1874C |
GE |
High-Speed 8-Bit Input and Output Ports | |
9 | CDP1874C |
Intersil Corporation |
High-Speed 8-Bit Input and Output Ports | |
10 | CDP1875C |
GE |
High-Speed 8-Bit Input and Output Ports | |
11 | CDP1875C |
Intersil Corporation |
High-Speed 8-Bit Input and Output Ports | |
12 | CDP1876C |
ETC |
(CDP1869C - CDP1876C) Video Interface System |