HD404318 Datasheet, PDF (22/66 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

HD404318 Series
Oscillator Circuit
Figure 15 shows a block diagram of the clock generation circuit.
OSC₂
OSC₁
System ^fOSC 1/4 ^fcyc Timing
oscillator
division
circuit
t_cyc
generator
circuit
ø_CPU
CPU with ROM,
RAM, registers,
flags, and I/O
ø_PER
Peripheral
function
interrupt
Figure 15 Clock Generation Circuit
TEST
RESET
OSC₁
OSC₂
GND
AV_SS
Figure 16 Typical Layout of Crystal and Ceramic Oscillator
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