180x

8-bit Microprocessors

180x
Manufacturer	RCA
Category	8-bit microprocessor
Introduction	1974
Max. Clock Frequency	6.4 MHz
History	The CPU was used in the famous COSMAC microcomputer kit as well as in some video games from RCA and Radio Shack. Besides the chip is the heart of the Voyager, Viking and Galileo (along with some AMD 2900 bit slice processors) probes. One reason for this is that a version of the 1802 used silicon on sapphire (SOS) technology, which leads to radiation and static resistance, ideal for space operation.
Technology	One-chip implementation of previous two-chip CPU: CDP1801 and CDP18101; CMOS technology; single +10 V power supply; low power consumption; standard devices operate in full military specification temperature (-55° to + 125 °C)

Examples

Package

Hughes HCMP 1802 D	RCA CDP 1802 CD	RCA CDP 1802 CD	RCA CDP 1802 D	SSS SCP 1802 D

40 pin CERDIP gold top	40 pin CERDIP silver top	40 pin CERDIP silver top	40 pin CERDIP gold top	40 pin CERDIP silver top

Examples

Package

comment

RCA X CDP 1804 A	RCA Z CDP 1805 ACD	RCA X CDP 1806 CE	RCA CDP 1806 ACQ

40 pin CERDIP gold top	40 pin CERDIP silver top	40 pin DIP	44 pin PLCC
engineering sample microcomputer	enhanced version of 1802 with on-chip RAM and counter/timer	functional and performance enhancement of 1802	functional and performance enhancement of 1802

FEATURES	CDP1802AC	CDP1802BC	CDP1805AC	CDP1806AC
Memory Addressing (Bytes)	64K	64K	64K	64K
On-Chip RAM (Bytes)			64K
Maximum Clock Frequency (MHz)	3.2	5	5	5
Instruction Time Min/Max (µs)	5/7.5	3.2/4.8	3.2/16	3.2/16
Time/Counter Bits			8	8
Prescalers			divide by 32	divide by 32
Bus Structure	Multiplexed Address Lines	Multiplexed Address Lines	Multiplexed Address Lines	Multiplexed Address Lines
Interrupts	Yes	Yes	Yes	Yes
Latched I/O Lines	Off-Chip	Off-Chip	Off-Chip	Off-Chip
Maximum Operating Temperature Range (°C)	-55°C to +125°C	-55°C to +125°C	-55°C to +125°C	-55°C to +125°C
Number of Pins/Package	40 D,E, 44 Q	40 D,E, 44Q	40 D,E, 44Q	40 D,E, 44Q
Serial Interface	Q-Line	Q-Line	Q-Line	Q-Line
AnswerFAX	1305	1305	1370	1370

Second source

Hughes Aircraft Inc.; SSS

Peripherals

1801Control Unit (half of 2 device CPU)
1821 1024 x 1 RAM
1822 256 x 4 RAM
1823 128 x 8 RAM
1824 32 x 8 RAM
1825 1024 x 4 RAM
1831 512 x 8 ROM
1832 512 x 8 ROM
1833 1024 x 8 ROM
1834 1024 x 8 ROM
1835 2048 x 8 ROM
1836 2048 x 8 ROM
1842 PROM, electrically erasable
1851 Programmable I/O Interface
1852 8-bit Input/Output Port
1853 N-bit Decoder
1854 UART
1855 Multiply-Devide Circuit
1856 4-bit Buffer/Separator (for memory interface)
1857 4-bit Bus Buffer/Separator (for I/O interface)
1858 4-bit Latch with Dual 1 of 4 Decoders
1859 4-bit Latch with 1 of 4 Decoder
1861 Video Display Controller
1862 Colour Generator Controller
1863 Programmable Tone Generator
1864 TV Interface
1866 Latch / Decoder Memory Interface
1867 Latch / Decoder Memory Interface
1868 Latch / Decoder Memory Interface
1869 Video Interface System
1870 Video Interface System
1873 1 of 8 Binary Decoder
1876 Video Interface System

Evaluation kit RCA COSMAC Micromonitor CDP 18S030


front top	front inside	CPU area	input terminal

Technology

Self-contained, powerful debugging tool for use with any system based on the CDP1802 Microprocessor. It permits in-circuit debugging in real time so that both hardware and software problems can be efficiently screened. The Micromonitor is interposed between the system under test and the system's CDP1802 CPU, giving the user control of both hardware interfaces and execution of the user program. The Micromonitor, although controlled by its own internal microprocessor, uses the microprocessor, power supply, clock, memory, and other components of the system under test to run the user progrm. Thus, it is not an emulator, but a monitor of system performance. It has been designed to induce a minimal effect on the system under test and provides a reliable measure of true system performance.