ADC0804LCN National Semiconductor, ADC0804LCN Datasheet - Page 37

• Manufacturer Part Number: ADC0804LCN
• Description: IC, ADC, 8BIT, 9708SPS, DIP-20
• Manufacturer: National Semiconductor

Specifications of ADC0804LCN

• Resolution (bits): 8bit
• Sampling Rate: 9.708kSPS
• Input Channel Type: Differential
• Data Interface: CMOS, Parallel, TTL
• Supply Current: 1.9mA
• Digital Ic Case Style: DIP
• No. Of Pins: 20
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Functional Description
Note 29: All numerical values are hexadecimal representations.
5.3 Multiple A/D Converters in a Z-80 Interrupt Driven
Mode (Continued)
The following notes apply:
• It is assumed that the CPU automatically performs a RST
• The address bus from the Z-80 and the data bus to the
• A/D data and identifying words will be stored in sequen-
7 instruction when a valid interrupt is acknowledged
(CPU is in interrupt mode 1). Hence, the subroutine
starting address of X0038.
Z-80 are assumed to be inverted by bus drivers.
tial memory locations starting at the arbitrarily chosen
address X 3E00.
FIGURE 21. Software for Auto-Zeroed Differential A/D
(Continued)
37
• The stack pointer must be dimensioned in the main pro-
• The peripherals of concern are mapped into I/O space
gram as the RST 7 instruction automatically pushes the
PC onto the stack and the subroutine uses an additional
6 stack addresses.
with the following port assignments:
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