MC68HC05C9A Datasheet, PDF (114/124 Pages) Freescale Semiconductor, Inc – Microcontrollers

MC68HSC05C9A
B.4.2 2.4–3.6-Volt High-Speed Control Timing
Characteristic⁽¹⁾
Symbol
Min
Max Unit
Oscillator frequency
Crystal
External Clock
f_OSC
—
4.2
MHz
dc
4.2
Internal operating frequency (f_OSC ÷ 2)
Crystal
External clock
f_OP
—
2.1
MHz
dc
2.1
Cycle time
Crystal oscillator startup time
Stop recovery startup time
RESET pulse width
t_cyc
t_OXOV
t_ILCH
t_RL
480
—
ns
—
100
ms
—
100
ms
1.5
—
t_cyc
Timer
Resolution⁽²⁾
Input capture pulse width
Input capture pulse width
Interrupt pulse width low (edge-triggered)
Interrupt pulse period
t_RESL
t_TH or t_TL
t_THTL
t_ILIH
t_ILIL
4.0
125
Note⁽³⁾
125
Note⁽⁴⁾
—
t_cyc
—
ns
—
t_cyc
—
ns
—
t_cyc
OSC1 pulse width
t_OH or t_OL
90
—
ns
1. V_DD = 2.4–3.6 Vdc
2. Because a 2-bit prescaler in the timer must count four internal cycles (t_cyc), this is the limiting minimum factor in determining
the timer resolution.
3. The minimum period t_TLTL should not be less than the number of cycle times it takes to execute the capture interrupt service
routine plus 24 t_cyc.
4. The minimum t_ILIL should not be less than the number of cycle times it takes to execute the interrupt service routine plus
19 t_cyc.
MC68HC05C9A Advance Information Data Sheet, Rev. 5.1
114
Freescale Semiconductor