Motorola 6800 microprocessor family
| Previous Generation | Related Family | Next Generation | |
|---|---|---|---|
6800
40-pin DIP |
680x
|
6809
|
Motorola 6800 is a 8-bit microprocessor which was released at about the
same time as Intel 8080. The 6800 had 16-bit address bus and could address up
to 64 KB of memory. From common registers the CPU had only two accumulators
and one index register. The 6800 didn't have I/O instructions and therefore
6800-based systems had to use memory-mapped I/O for input/output capabilities.
Motorola 6800 started the big family of 680x
microcontrolers and microprocessors, some of which are still produced today.
Second-source manufacturers
AMI, Fairchild, Thomson
Die pictures:
Picture of: AMI S6800
AMI became second-source supplier for 6800 microprocessors in 1974. The second-source agreement was extended in December 1975 - January 1976, which allowed AMI to manufacture wider range of devices from 6800 family. AMI microprocessors were fabricated in plastic and ceramic packages in 4 different speed grades, from 1 MHz to 2.5 MHz.
Picture of: Fairchild F68A00S
1.5 MHz
40-pin ceramic DIP
40-pin ceramic DIP
Picture of: Motorola XC6800B
1 MHz
40-pin ceramic DIP
Gray ceramic/gold top/gold pins
Engineering sample of Motorola 6800. In the early days Motorola used XC prefix for engineering prototypes, this prefix was changed to "PC" for more recent processor families. It seems that the speed designation of the XC processors was different from production processors - production parts had speed designation in the middle of the part number, for example, 68B00 for 2 MHz parts, while the engineering samples had it at the end of the part number.
40-pin ceramic DIP
Gray ceramic/gold top/gold pins
Engineering sample of Motorola 6800. In the early days Motorola used XC prefix for engineering prototypes, this prefix was changed to "PC" for more recent processor families. It seems that the speed designation of the XC processors was different from production processors - production parts had speed designation in the middle of the part number, for example, 68B00 for 2 MHz parts, while the engineering samples had it at the end of the part number.
Picture of: Thomson EF6800CM
40-pin side-brazed ceramic DIP
Purple ceramic/gold top/gold pins
Purple ceramic/gold top/gold pins
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At a glance
Type:
8-bit microprocessor
Introduction:
1974
Frequency (MHz):
1 - 2