MC68HC908GP32_08 Datasheet, PDF (240/266 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Electrical Specifications
19.8 3.0-V Control Timing
Characteristic⁽¹⁾
Symbol
Min
Max
Unit
Frequency of operation
Crystal option
External clock option⁽²⁾
Internal operating frequency
Internal clock period (1/f_OP)
RST input pulse width low
IRQ interrupt pulse width low
(edge-triggered)
f_OSC
32
dc
f_OP (f_BUS)
—
t_CYC
244
t_IRL
200
t_ILIH
200
100
kHz
16.4
MHz
4.1
MHz
—
ns
—
ns
—
ns
IRQ interrupt pulse period
Notes:
t_ILIL
(3)
—
t_CYC
1. V_SS = 0 Vdc; timing shown with respect to 20% V_DD and 70% V_DD unless otherwise noted.
2. No more than 10% duty cycle deviation from 50%
3. The minimum period, t_ILIL or t_TLTL, should not be less than the number of cycles it takes to execute the interrupt service
routine plus t_CYC.
t_RL
RST
t_ILIL
t_ILIH
IRQ
Figure 19-1. RST and IRQ Timing
MC68HC908GP32 Data Sheet, Rev. 10
240
Freescale Semiconductor