NSC800N-1 National Semiconductor, NSC800N-1 Datasheet - Page 18

• Manufacturer Part Number: NSC800N-1
• Description: IC CPU 8BIT 1MHZ 40-DIP
• Manufacturer: National Semiconductor

Specifications of NSC800N-1

• Processor Type: 8-Bit CMOS
• Speed: 1MHz
• Voltage: 4.5 ~ 5.5V
• Mounting Type: Through Hole
• Package / Case: 40-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Other names: *NSC800N-1; NSC800; NSC800-1

Figure 10 shows the timing for memory read (other than
9 0 Timing and Control
opcode fetchs) and write cycles with and without a wait
state The RD stobe is widened by
state) for memory reads so that the actual latching of the
input data occurs later
WAIT state automatically inserted during IO operation
FIGURE 11a Input and Output Cycles without WAIT States
FIGURE 11b Input and Output Cycles with WAIT States
(Continued)
2
t
(half the machine
18
Figure 11 shows the timing for input and output cycles with
and without wait states The CPU automatically inserts one
wait state into each I O instruction to allow sufficient time
for an I O port to decode the address
TL C 5171 – 19
TL C 5171 – 20