MC68HC05X16 Datasheet, PDF (167/232 Pages) Freescale Semiconductor, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
12.4
Control timing
Table 12-4 Control timing
(V_DD = 5.0 Vdc ± 10%, V_SS = 0 Vdc, T_A = –40°C to +125°C)
Characteristic
Symbol
Frequency of operation
Oscillator frequency
f_OSC
MCAN module clock frequency
f_CAN
MCU bus frequency
f_MCU
Cycle time (see Figure 10-1)
t_CYC
Crystal oscillator start-up time (see Figure 10-1) t_OXOV
Stop recovery start-up time (crystal oscillator)
t_ILCH
A/D converter stabilization time
t_ADON
External RESET input pulse width
t_RL
Power-on RESET output pulse width (mask option)
4064 cycle
16 cycle
t_PORL
t_PORL
Watchdog RESET output pulse width
t_DOGL
Watchdog time-out
t_DOG
EEPROM byte erase time
EEPROM byte program time⁽¹⁾
t_ERA
t_PROG
Timer (see Figure 12-1)
Resolution⁽²⁾
Input capture pulse width
Input capture pulse period
t_RESL
t_TH, t_TL
t_TLTL
Interrupt pulse width (edge-triggered)
t_ILIH
Interrupt pulse period
t_ILIL
OSC1 pulse width
Write/erase endurance⁽⁵⁾⁽⁶⁾
t_OH, t_OL
—
Data retention⁽⁵⁾⁽⁶⁾
—
Min
Max Unit
0
22 MHz
0
11 MHz
0
2.2 MHz
455
—
ns
—
100 ms
100 ms
500 µs
1.5
—
t_CYC
4064
—
t_CYC
16
—
t_CYC
1.5
—
t_CYC
6144
7168 t_CYC
10
10
ms
10
10
ms
4
—
125
—
—⁽³⁾
—
125
—
—⁽⁴⁾
—
90
—
10000
10
t_CYC
ns
t_CYC
ns
t_CYC
ns
cycles
years
(1) For bus frequencies less than 2 MHz, the internal RC oscillator should be used when
programming the EEPROM.
(2) Since a 2-bit prescaler in the timer must count four external cycles (t_cyc), this is the limiting
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 period t_ILIL should not be less than the number of cycle times it takes to execute
the interrupt service routine plus 21 t_cyc.
(5) At a temperature of 85°C.
(6) Refer to Reliability Monitor Report (currrent quarterly issue) for current failure rate information.
t_TLTL
External
signal
(TCAP1,
TCAP2)
t_TH
t_TL
Figure 12-1 Timer relationship
12
MC68HC05X16
ELECTRICAL SPECIFICATIONS
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12-5
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