Philips PM2519 - Page 21

2.2.2.
2.2.3.
Digital section
— The microcomputer MAB 8440 (with internal ROM and RAM)
— The external RAM with battery back-up
~ The function selector
~ The mode switches with their decoding
— The ADC interface (FET switch control)
— The dividing circuits for the frequency measurements
Display section
The display section consists of:
— The display interface circuit
— The 4.5 digit liquid-crystal display
2-3