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MCS-48 (8048) class ICs
MCS-48 (8048) information
The Intel 8048 microcontroller, Intel's first µC introduced in 1979, was used in the Magnavox Odyssey² video game console (as a 100KHz 8021) and (in its 8042 variant) in the original IBM PC keyboard. The 8048 is probably the most prominent member of Intel's MCS-48 familiy of microcontrollers. It was inspired by, and is somewhat similar to, the Fairchild F8 microprocessor.
The MCS-48 has over 90 instructions with 90% of them being single byte.
The 8048 has a modified Harvard architecture, with internal or external program ROM and 64–256 bytes of internal (on-chip) RAM. The I/O is mapped into its own address space, separate from programs and data. Though the 8048 was eventually replaced by the very popular Intel 8051, even at the turn of the millennium it remains quite popular, due to its low cost, wide availability, memory efficient one-byte instruction set, and mature development tools. Because of this it is much used in high-volume consumer electronics devices such as TV sets, TV remotes, toys, and other gadgets where cost-cutting is essential.
Device RAM (bytes) ROM Speed Timers Ports
64 1024 100-400KHz 2 2x8, 1x4
128 2048 100-400KHz 2 3x8
8035 64 - 11MHz
8038 64 - 3x8
8039 128 - 11MHz 3x8
8040 256 - 11MHz
8048 64 1024 11MHz 2 3x8
8049 128 2048 11MHz 2 3x8
8050 256 4096 11MHz
**2 pins are High Current Driving outputs
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   MCS-48 P8048H