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MC68HC05B4 Datasheet, PDF (141/298 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
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Table 11-7 Control timing for 3.3V operation
(VDD = 3.3Vdc ± 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
EEPROM byte erase time
0 to 70 (standard)
– 40 to 85 (extended)
– 40 to 125 (automotive)
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)
fOSC
fOSC
fOP
fOP
tCYC
Ot XOV
ILt CH
At DRC
tADON
tRL
tPORL
tPORL
tDOGL
t DOG
tERA
tERA
tERA
tPR OG
tPR OG
tPR OG
tRESL
tTH, tTL
tTLTL
ItLIH
tILIL
tOH , tOL
—
—
Min
Max Unit
—
2.0 MHz
dc
2.0 MHz
—
1.0 MHz
dc
1.0 MHz
1000
—
ns
—
100
ms
100
ms
5
µs
500
µs
1.5
—
t CYC
4064
16
—
—
tCYC
tCYC
1.5
—
t CYC
6144
7168 t CYC
30
—
ms
30
—
ms
30
—
ms
30
—
ms
30
—
ms
30
—
ms
4
—
250
—
— (3)
—
250
—
— (4)
—
200
—
10000
10
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 external cycles C(tYC ), this is the limiting
factor in determining the timer resolution.
(3) The minimum period tTLTL should not be less than the number of cycle times it takes to
execute the capture interrupt service routine plus 24 Ct YC .
(4)
tThheeinmteinrrimuputmseprevricioedrtoILuItLinsehopululds
not be less
21 Ct YC .
than the number of
cycle times
it takes
to execute
(5) tOH and tOL should not total less than 500ns.
(6) At a temperature of 85°C
(7) Refer to Reliability Monitor Report (current quarterly issue) for current failure rate information.
11
MC68HC05B6
Rev. 4
ELECTRICAL SPECIFICATIONS
TPG
MOTOROLA
11-11
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