ADC0804LCN National Semiconductor, ADC0804LCN Datasheet - Page 37
ADC0804LCN
Manufacturer Part Number
ADC0804LCN
Description
IC, ADC, 8BIT, 9708SPS, DIP-20
Manufacturer
National Semiconductor
Datasheet
1.ADC0804LCN.pdf
(41 pages)
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
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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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