user manual

Electrical Specifications
Control Timing (5.0 Vdc and 2.2 Vdc)
MC68HC05RC16 — Rev. 3.0 General Release Specification
MOTOROLA Electrical Specifications 109
11.8 Control Timing (5.0 Vdc and 2.2 Vdc)
Characteristic Symbol Min Max Unit
Frequency of Operation
Crystal
External Clock
f
osc
—
dc
4.2
4.2
MHz
Internal Operating Frequency
Crystal (f
OSC
/2)
External Clock (f
OSC
/2)
f
op
—
dc
2.1
2.1
MHz
Cycle Time t
cyc
480 — ns
Crystal Oscillator Startup Time t
OXOV
— 100 ms
Stop Recovery Startup Time (Crystal Oscillator) t
ILCH
— 100 ms
RESET Pulse Width t
RL
1.5 — t
cyc
Interrupt Pulse Width Low (Edge-Triggered) t
ILIH
125 — ns
Interrupt Pulse Period t
ILIL
Note 2 — t
cyc
OSC1 Pulse Width t
OH
, t
OL
90 — ns
NOTES:
1. V
DD
= 2.0 to 5.5 Vdc, V
SS
= 0 Vdc, T
A
= 0
o
C to +70
o
C, unless otherwise noted
2. The minimum period, t
ILI
, should not be less than the number of cycle times it takes to execute the interrupt service
routine plus 19 t
CYC
.