MC68HC05B4 Datasheet, PDF (273/298 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

H.9
Control timing
Preliminary ^{Table H-11 Control timing for 5V operation}
(V_DD = 5.0 Vdc ± 10%, V_SS = 0 Vdc, T_A = –40 to +85°C)
Characteristic
Symbol
Min
Max
Frequency of operation
Crystal option
External clock option
f_OSC
—
4.2
f_OSC
dc
4.2
Internal operating frequency (f_OSC /2)
Using crystal
Using external clock
f_OP
—
2.1
f_OP
dc
2.1
Cycle time (see Figure 9-1)
t_CYC
476
—
Crystal oscillator start-up time (see Figure 9-1) _Ot _XOV
—
100
Unit
MHz
MHz
MHz
MHz
ns
ms
Stop recovery start-up time (crystal oscillator)
IL^t CH
100
ms
RC oscillator stabilization time
A^t DRC
5
µs
A/D converter stabilization time
t_ADON
500
µs
Preliminary ^{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)
EEPROM byte program time ⁽¹⁾
0 to 70 (standard)
– 40 to 85 (extended)
Timer (see Figure H-10)
Resolution⁽²⁾
t_RL
t_PORL
t_PORL
t _DOGL
t _DOG
t_ERA
t_{ER A}
t_{PR OG}
t_{PR O G}
t_RESL
3.0
—
4064
—
16
—
1.5
—
6144
7168
10
—
10
—
10
—
10
—
4
—
t _CYC
t_CYC
t_CYC
t _CYC
t _CYC
ms
ms
ms
ms
t_CYC
Input capture pulse width
Input capture pulse period
t_TH, t_TL
125
t_TLTL
— ⁽³⁾
—
ns
—
t_CYC
Interrupt pulse width (edge-triggered)
I^tLIH
125
—
ns
Preliminary ^{Interrupt pulse period}
OSC1 pulse width ⁽⁵⁾
Write/Erase endurance⁽⁶⁾⁽⁷⁾
Data retention⁽⁶⁾⁽⁷⁾
t_ILIL
t_OH , t_OL
—
—
— ⁽⁴⁾
—
90
—
10000
10
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(t_YC ), 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 _Ct _YC .
(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 _Ct _YC .
(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
MC68HC705B32
TPG
MOTOROLA
H-27