= HF8V = / = SP8WJT = / = SP0106RZ =
HF-6423
PROJECT: HF-6423
DESCRIPTION: RAM Loader 64KB with battery backup
STATUS: u
PROJECT START DATE: 2023
LOCALISATION:
DOCUMENTATION: TM, 2 pages
PCB: TPD42612
DIMENSIONS: 50 x 43 mm
HARDWARE VERSION: 3
TECHNICAL PARAMETRES
CHIP: 2 x UPD43256
CAPACITY: 64 KB
MEMORY TYPE: STATIC RAM
ACCSESS TIME: 70 ns
INTERFACE: HF-10064
I/O LINES: 27 (DATA: 8, ADR:15, CTRL:4)
AVR DRIVER: 20234
MINIMUM HOLDING DATA VOLTAGE: 2.0 V
MINIMUM HOLDING DATA TIME: guaranteed 36 hours (at least)
HF-6423 with converter HF-64123
HF-6423 can be used as external RAM memory for HF-6030 (with converter HF-64123) as well as memory program for many experimental digital systems, especially retro systems with external memories.
This device introduced paralell memory standard HF-10064 which can be implemented on various digital systems. Later special converted has been made HF-64123 which allows connect my another paralell standard HF-10031.
Sources:
[1]
Prefix 64
HF Register
Microcontrollers in my constructions and external equipment
UC Database - my CPU collection
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