MC908GR8CDWE Datasheet, PDF (369/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Freescale Semiconductor, Inc.
Electrical Specifications
3.0 V Control Timing
23.8 3.0 V Control Timing
Table 23-7. 3.0 V Control Timing
Characteristic⁽¹⁾
Symbol
Min
Max Unit
Frequency of operation⁽²⁾
Crystal option
External clock option⁽³⁾
f_osc
32
100 kHz
dc⁽⁴⁾
16.4 MHz
Internal operating frequency
f_op
—
4.1 MHz
Internal clock period (1/f_OP)
t_cyc
244
— ns
RESET input pulse width low⁽⁵⁾
t_IRL
125
— ns
IRQ interrupt pulse width low⁽⁶⁾
(edge-triggered)
t_ILIH
125
— ns
IRQ interrupt pulse period
t_ILIL
Note 8
—
t_cyc
16-bit timer⁽⁷⁾
Input capture pulse width
Input capture period
t_TH,t_TL
t_TLTL
Note 8
— ns
—
t_cyc
Notes:
1. V_SS = 0 Vdc; timing shown with respect to 20% V_DD and 70% V_SS unless otherwise noted.
2. See Clock Generation Module Characteristics for more information.
3. No more than 10% duty cycle deviation from 50%
4. Some modules may require a minimum frequency greater than dc for proper operation.
See appropriate table for this information.
5. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse
width to cause a reset.
6. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to
be recognized.
7. Minimum pulse width is for guaranteed interrupt. It is possible for a smaller pulse width to
be recognized.
8. 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.
MC68HC908GR8 — Rev 4.0
MOTOROLA
Electrical Specifications
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Technical Data
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