MC68HC908MR8 Datasheet, PDF (346/372 Pages) Motorola, Inc – Microcontrollers

Electrical Specifications
21.8 Control Timing
Characteristic⁽¹⁾
Symbol
Min
Max
Unit
Frequency of operation⁽²⁾
Crystal option
External clock option⁽³⁾
f_OSC
1
dc⁽⁴⁾
8
MHz
32.8
Internal operating frequency
f_OP
—
8.2
MHz
RESET input pulse width low⁽⁵⁾
t_IRL
50
—
ns
1. V_DD = 5.0 Vdc ± 10%; V_SS = 0 Vdc; timing shown with respect to 20% V_DD and 70% V_DD, unless otherwise noted
2. See 21.8 Control Timing for more information.
3. No more than 10 percent duty cycle deviation from 50 percent.
4. Some modules may require a minimum frequency greater than dc for proper operation; see appropriate table for this infor-
mation.
5. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause reset.
21.9 TImer Interface Module Characteristics
Characteristic
Input capture pulse width
Input clock pulse width
Symbol
Min
t_TIH
t_TIL
125
t_TCH
t_TCL
(1/f_OP) + 5
Max
—
—
Unit
ns
ns
Technical Data
346
Electrical Specifications
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor