MC908JL3ECPE Datasheet, PDF (161/180 Pages) Freescale Semiconductor, Inc – Microcontrollers

A.5.3 Control Timing
Table A-3. Control Timing
Characteristic⁽¹⁾
Symbol
Min
Max
Unit
Internal operating frequency⁽²⁾
RST input pulse width low⁽³⁾
f_OP
—
t_IRL
1.5
2
MHz
—
μs
1. V_DD = 2.2 Vdc, V_SS = 0 Vdc, T_A = T_L to T_H; timing shown with respect to 20% V_DD and 70% V_DD, unless otherwise noted.
2. Some modules may require a minimum frequency greater than dc for proper operation; see appropriate table for this infor-
mation.
3. Minimum pulse width reset is guaranteed to be recognized. It is possible for a smaller pulse width to cause a reset.
A.5.4 Oscillator Characteristics
Table A-4. Oscillator Component Specifications
Characteristic
Symbol
Min
Crystal frequency, XTALCLK
External clock reference frequency⁽¹⁾
Crystal load capacitance⁽²⁾
Crystal fixed capacitance⁽²⁾
Crystal tuning capacitance⁽²⁾
Feedback bias resistor
Series resistor^{(2), (3)}
f_OSCXCLK
—
f_OSCXCLK
dc
C_L
—
C₁
—
C₂
—
R_B
—
R_S
—
1. No more than 10% duty cycle deviation from 50%
2. Consult crystal vendor data sheet
3. Not Required for high frequency crystals
Typ
—
—
—
2 × C_L
2 × C_L
10 MΩ
—
Max
8
8
—
—
—
—
—
Unit
MHz
MHz
MC68HC908JL3E Family Data Sheet, Rev. 4
Freescale Semiconductor
161