MC68HC05L28 Datasheet, PDF (128/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

12.4
AC electrical characteristics for 5V operation
Table 12-4 Control timing
Characteristics
Frequency of operation
crystal
external clock
Internal operating frequency
crystal
external clock
Cycle time
Crystal oscillator start-up time
Stop recovery start-up time (crystal oscillator)
RESET pulse width
Interrupt pulse width low (edge-triggered)
Interrupt pulse period⁽¹⁾
OSC1 pulse width
EEPROM byte erase time (0 – 70 °C)
EEPROM block erase time (0 – 70 °C)
EEPROM bulk erase time (0 – 70 °C)
EEPROM bulk erase time (0 – 70 °C)
EEPROM bulk erase time (0 – 70 °C)
16 bit timer resolution⁽²⁾
16 bit timer input capture pulse width
16 bit timer input capture pulse period
Symbol Min
f_OSC
—
f_OSC
dc
f_OP
—
f_OP
dc
t_CYC
460
O^t XOV
—
IL^t CH
—
t_RL
1.5
I^tLIH
250
t_ILIL
—
t_{OH ,} t_OL
90
t_EBYT
10
t_EBLK
100
t_EBULF
400
t_EBYT
10
t_FPV
—
t_RESL
4
T^t LTH
250
T^t LTL
(3)
Max
4.332
4.332
2.17
2.17
—
100
100
—
—
—
—
—
—
—
—
10
5
—
—
Unit
MHz
MHz
MHz
MHz
ns
ms
ms
t _CYC
ns
t _CYC
ns
ms
ms
ms
ms
µs
t_CYC
ns
t _CYC
(1) The minimum period t_ILIL should not be less than the number of cycle times it takes to execute service routine plus
21 t_CYC
(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_TLTLshould not be less than the number of cycles it takes to execute the interrupt service
routine plus 24 t_CYC
12
MOTOROLA
12-4
ELECTRICAL SPECIFICATIONS
TPG
MC68HC05L28