MC68HC05C9A Datasheet, PDF (94/124 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrical Specifications
12.8 3.3-Volt Control Timing
Characteristic⁽¹⁾
Symbol
Min
Max
Unit
Frequency of operation
Crystal
External clock
f_OSC
—
dc
2.0
MHz
2.0
Internal operating frequency (f_OSC ÷ 2)
Crystal
External clock
f_OP
—
dc
1.0
MHz
1.0
Cycle time
Crystal oscillator start-up time
Stop recovery start-up time (crystal oscillator)
RESET pulse width
Timer
Resolution⁽²⁾
Input capture pulse width
Input capture pulse period
t_cyc
t_OXOV
t_ILCH
t_RL
t_RESL
t_TH, t_TL
t_TLTL
1000
—
—
1.5
4.0
125
(3)
—
ns
100
ms
100
ms
—
t_cyc
—
t_cyc
—
ns
—
t_cyc
Interrupt pulse width low (edge-triggered)
Interrupt pulse period
t_ILIH
250
t_ILIL
(4)
—
ns
—
t_cyc
OSC1 pulse width
t_OH, t_OL
200
—
ns
1. V_DD = 3.3 Vdc ± 0.3 Vdc, V_SS = 0 Vdc, T_A = –40 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 deter-
mining 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.
t_TLTL(1)
t_TH(1)
t_TL(1)
TCAP PIN
1. Refer to timer resolution data in 12.7 5.0-Volt Control Timing and 12.8 3.3-Volt Control Timing.
Figure 12-4. TCAP Timing Relationships
MC68HC05C9A Advance Information Data Sheet, Rev. 5.1
94
Freescale Semiconductor