MC68HC05X16 Datasheet, PDF (211/232 Pages) Freescale Semiconductor, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
B.9.4 Control timing
Table B-10 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
MCAN module clock frequency
MCU bus frequency
Cycle time (see Figure 10-1)
Crystal oscillator start-up time (see Figure 10-1)
Stop recovery start-up time (crystal oscillator)
A/D converter stabilization time
External RESET input pulse width
Power-on RESET output pulse width
4064 cycle
16 cycle
Watchdog RESET output pulse width
Watchdog time-out
EEPROM byte erase time
EEPROM byte program time⁽¹⁾
Timer (see Figure B-9)
Resolution⁽²⁾
Input capture pulse width
Input capture pulse period
Interrupt pulse width (edge-triggered)
Interrupt pulse period
OSC1 pulse width
Write/erase endurance⁽⁵⁾⁽⁶⁾
Data retention⁽⁵⁾⁽⁶⁾
f_OSC
f_CAN
f_MCU
t_CYC
t_OXOV
t_ILCH
t_ADON
t_RL
t_PORL
t_PORL
t_DOGL
t_DOG
t_ERA
t_PROG
t_RESL
t_TH, t_TL
t_TLTL
t_ILIH
t_ILIL
t_OH, t_OL
—
—
Min
Max
0
22
0
11
0
4
455
—
—
100
100
500
3.0
—
4064
—
16
—
1.5
—
6144
7168
10
10
10
10
4
—
125
—
—⁽³⁾
—
125
—
—⁽⁴⁾
—
90
—
10000
10
Unit
MHz
MHz
MHz
ns
ms
ms
µs
t_CYC
t_CYC
t_CYC
t_CYC
t_CYC
ms
ms
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 (current quarterly issue) for current failure rate
information.
t_TLTL
External
signal
(TCAP1,
TCAP2)
t_TH
t_TL
Figure B-9 Timer relationship
MC68HC05X16
MC68HC705X32
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15
B-27