MC68HC05B6_13 Datasheet, PDF (215/302 Pages) Freescale Semiconductor, Inc – Microcontrollers

E.8
Control timing
Table E-11 Control timing for 5V operation
(V_DD = 5.0 Vdc ± 10%, V_SS = 0 Vdc, T_A = T_L to T_H)
Characteristic
Symbol
Frequency of operation
Crystal option
External clock option
Internal operating frequency (f_OSC/2)
Using crystal
Using external clock
Cycle time (see Figure 9-1)
Crystal oscillator start-up time (see Figure 9-1)
Stop recovery start-up time (crystal oscillator)
RC oscillator stabilization time
A/D converter stabilization time
External RESET input pulse width
Power-on RESET output pulse width
f_OSC
f_OSC
f_OP
f_OP
t_CYC
t_OXOV
t_ILCH
t_ADRC
t_ADON
t_RL
4064 cycle
16 cycle
Watchdog RESET output pulse width
Watchdog time-out
EEPROM byte erase time
t_PORL
t_PORL
t_DOGL
t_DOG
0 to 70 (standard)
t_ERA
– 40 to 85 (extended)
t_ERA
– 40 to 105 (industrial)
t_ERA
– 40 to 125 (automotive)
t_ERA
EEPROM byte program time⁽¹⁾
0 to 70 (standard)
– 40 to 85 (extended)
– 40 to 105 (industrial)
– 40 to 125 (automotive)
Timer (see Figure E-11)
Resolution⁽²⁾
Input capture pulse width
Input capture pulse period
Interrupt pulse width (edge-triggered)
Interrupt pulse period
OSC1 pulse width⁽⁵⁾
Write/Erase endurance⁽⁶⁾⁽⁷⁾
Data retention⁽⁶⁾⁽⁷⁾
t_PROG
t_PROG
t_PROG
t_PROG
t_RESL
t_TH, t_TL
t_TLTL
t_ILIH
t_ILIL
t_OH, t_OL
—
—
Min
Max Unit
—
4.2 MHz
dc
4.2 MHz
dc
2.1 MHz
dc
2.1 MHz
480
—
ns
—
100
ms
100
ms
5
µs
500
µs
1.5
—
t_CYC
4064
16
—
—
t_CYC
t_CYC
1.5
—
t_CYC
6144
7168 t_CYC
10
—
ms
10
—
ms
10
—
ms
10
—
ms
10
—
ms
10
—
ms
15
—
ms
20
—
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
factor
a 2-bit prescaler in the timer must count
in determining the timer resolution.
four
external cycles (t_CYC),
this
is the
limiting
(3) Texheecmutienitmheumcappeturiroedint_{TteLTrrLuspht} osuelrdvincoetrboeutliensesptlhuasn2t4het_Cn_Yu_Cm. ber of cycle times it takes to
(4)
The minimum period
execute the interrupt
st^ILe^Ir^Lvsicheoruoldutninoet
be less
plus 21
than the
t_CYC.
number
of
cycle
times
it
takes
to
(5) t_OH and t_OL should not total less than 238ns.
(6) At a temperature of 85°C
(7) Refer to Reliability Monitor Report (current quarterly issue) for current failure rate information.
14
MC68HC05B6
Rev. 4.1
MC68HC705B16
Freescale
E-27