MC68HC901 Datasheet, PDF (57/73 Pages) Motorola, Inc – Multi-Function Peripheral

Electrical Characteristics
8.6 CLOCK TIMING
(See Figure 8-1)
NUM
CHARACTERISTIC
— Frequency of Operation
1 Cycle Time
2, 3 Clock Pulse Width
4, 5 Rise and Fall Times
SYMBOL
MIN
f
1.0
t_cyc
250
t_CL, t_CH
110
t_Cr, t_Cf
—
MAX
4.0
1000
485
15
UNIT
MHz
ns
ns
ns
2.0 V
0.8 V
1
2
3
4
5
Figure 8-1. Clock Input Timing Diagram
10 pF
5 pF
FIGURE - CLOCK INPUT TIMING DIAGRAM
XTAL1MC68HC901UM ^{/ AD}
Crystal Parameters:
Parallel resonance fundamental mode AT cut
Y1
MC68HC901
RS _-<- 150 Ω (f = 2.8 - 4.0 MHz)
RS _-<- 300 Ω (f = 2.0 - 2.7 MHz)
CL = 18 pF, CM = 0.02 pF, CR = 5 pF, LM = 96 MHz
XTAL2
f (typical) = 2.4576 MHz
Figure 8-2. MFP External Oscillator Components
FIGURE - MFP EXTERNAL OSCILLATOR COMPONENTS
MC68HC901UM / AD
8-4
MC68HC901 USER’S MANUAL
MOTOROLA