MC68HC05BD3 Datasheet, PDF (95/112 Pages) Motorola, Inc – HCMOS microcontroller

12.4
Control Timing
Table 12-2 Control Timing
(V_DD=5.0Vdc ±10%, V_SS=0Vdc, temperature range=0 to 70°C)
CHARACTERISTICS
SYMBOL MINIMUM MAXIMUM UNIT
Frequency of operation
Crystal option
External clock option
f_OSC
–
dc
4.2
MHz
4.2
MHz
Internal operating frequency (f_OSC/2)
Crystal
External clock
f_OP
–
2.1
MHz
f_OP
dc
2.1
MHz
Processor cycle time
t_CYC
480
–
ns
Crystal oscillator start-up time
t_OXOV
–
100
ms
External RESET pulse width
t_RL
1.5
–
t_CYC
Watchdog RESET output pulse width
t_DOGL
1.5
–
t_CYC
Watchdog time-out
t_DOG
114688
917504 t_CYC
Interrupt pulse width (edge-triggered)
Interrupt pulse period
t_ILIH
125
t_ILIL
–⁽¹⁾
–
ns
–
t_CYC
EXTAL pulse width
t_OH, t_OL
100
–
t_CYC
Notes:
(1) The minimum period t_ILIL should not be less than the number of cycles it takes to execute the
interrupt service routine plus 21 t_CYC.
12
MC68HC05BD3
ELECTRICAL SPECIFICATIONS
TPG
MOTOROLA
12-3