MC68HC05C8A Datasheet, PDF (90/116 Pages) Motorola, Inc – Microcontrollers

Electrical Specifications
13.8 5.0-V Control Timing
Characteristic⁽¹⁾
Symbol
Min
Max
Unit
Oscillator frequency
Crystal
External clock
f_OSC
—
dc
4.2
MHz
4.2
Internal operating frequency
Crystal
External clock
Internal clock cycle time
Crystal oscillator startup time
Stop recovery startup time (crystal oscillator)
RESET pulse width
f_OP
—
dc
t_CYC
480
t_OXOV
—
t_ILCH
—
t_RL
1.5
2.1
MHz
2.1
—
ns
100
ms
100
ms
—
t_CYC
Timer
Resolution⁽²⁾
Input capture pulse width
Input capture pulse period
Interrupt pulse width low (edge-triggered)
Interrupt pulse period
OSC1 pulse width
t_RESL
t_TH, t_TL
t_TLTL
tilih
t_ILIL
toh, tol
4.0
125
Note⁽³⁾
125
Note⁽⁴⁾
90
—
t_CYC
—
ns
—
t_CYC
—
ns
—
t_CYC
—
ns
1. V_DD = 5.0 Vdc ± 10%, V_SS = 0 Vdc, T_A = –40°C to +125°C, unless otherwise noted.
2. Because a 2-bit prescaler in the timer must count four internal cycles (t_CYC), this is the limiting minimum factor in determin-
ing 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.
MC68HC05C8A • MC68HCL05C8A • MC68HSC05C8A Data Sheet, Rev. 5.1
90
Freescale Semiconductor