Hitachi 902 - EMIO100 Board (271-3786); Explanation of Circuit Board; External View

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10.3 EMIO100 Board
(1) Explanation of Circuit Board
This circuit board is connected to the VME bus and has the following functions.
• EEPROM (4 Mbytes)
• 16-bit ADC (4 channels for photometry (main/sub), ISE, temperature)
• Temperature control
• Serial communication (RS-232C × 4 channels)
• Printer control (IPRNT95)
• Buzzer control (programmable oscillator)
(2) External View
EEPROM
Programmable
oscillator
VR2
VR1
AD converting section
VR4
VR3
IPRNT95
LED