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MC68HC05B4 Datasheet, PDF (140/298 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
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11.4
Control timing
11
Table 11-6 Control timing for 5V operation
(VDD = 5.0 Vdc ± 10%, VSS = 0 Vdc, TA = TL to TH)
Characteristic
Symbol
Frequency of operation
Crystal option
External clock option
Internal operating frequency (fOSC /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
4064 cycle
16 cycle
Watchdog RESET output pulse width
Watchdog time-out
fOSC
fOSC
fOP
fOP
tCYC
Ot XOV
ILt CH
At DRC
tADON
tRL
tPORL
tPORL
t DOGL
t DOG
EEPROM byte erase time
0 to 70 (standard)
tERA
– 40 to 85 (extended)
tERA
– 40 to 125 (automotive)
tERA
EEPROM byte program time (1)
0 to 70 (standard)
– 40 to 85 (extended)
– 40 to 125 (automotive)
Timer (see Figure 11-13)
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)
tPR OG
tPR OG
tPR OG
tRESL
tTH, tTL
tTLTL
ItLIH
tILIL
tOH , tOL
—
—
Min
Max
—
4.2
dc
4.2
dc
2.1
dc
2.1
476
—
—
100
100
5
500
1.5
—
4064
—
16
—
1.5
—
6144
7168
10
—
10
—
10
—
10
—
10
—
20
—
4
—
125
—
— (3)
—
125
—
— (4)
—
90
—
10000
10
Unit
MHz
MHz
MHz
MHz
ns
ms
ms
µs
µs
t CYC
tCYC
tCYC
t CYC
t CYC
ms
ms
ms
ms
ms
ms
tCYC
ns
tCYC
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
factor in determining the timer resolution.
external
cycles C(tYC ),
this
is
the limiting
(3)
tThheecmapintuimreuminteprerruiopdt steTLrvTLiceshroouultdinneoptlbues
less than
24 Ct YC .
the number of
cycle times
it
takes to
execute
(4)
tThheeinmteinrrimuputmseprevricioedrtoILuItLinsehopululds
not be
21 Ct YC
less
.
than
the
number
of
cycle
times
it
takes
to
execute
(5) tOH and tOL 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.
MOTOROLA
11-10
ELECTRICAL SPECIFICATIONS
TPG
MC68HC05B6
Rev. 4
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