MC68HC05J3 Datasheet, PDF (77/92 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

9.4
AC electrical characteristics
Table 9-5 AC electrical characteristics for 5V operation
(V_DD = 5.0 Vdc ± 10%, V_SS = 0 Vdc, T_A = T_L to T_H
Characteristic
Symbol
Min
Frequency of operation
Crystal
External clock
f_OSC
—
f_OSC
dc
Internal operating frequency
Crystal (f_OSC /2)
External clock (f_OSC /2)
f_OP
—
f_OP
dc
Processor cycle time
t_CYC
480
Ceramic resonator start-up time
t_OXOV
—
Ceramic resonator STOP recovery start-up time t_ILCH
—
OSC1 pulse width
t_OH, t_OL
90
RESET pulse width
t_RL
1.5
16-bit timer
Resolution⁽¹⁾
Input capture pulse width
Input capture pulse period
t_RESL
—
t_TLTH
250
t_TLTL
(2)
Power-on reset delay
t_PORL
4064
Interrupt pulse width low (edge-triggered)
Interrupt pulse period (see Figure 9-2)
t_ILIH
125
t_ILIL
(3)
Max
Unit
4.2
MHz
4.2
MHz
2.1
MHz
2.1
MHz
—
ns
10
ms
10
ms
—
ns
—
t_CYC
4
t_CYC
—
ns
—
t_CYC
4064
t_CYC
—
ns
—
t_CYC
(1) Since the 2-bit prescaler in the timer must count four external cycles (t_CYC), this is the limiting factor in
determining the timer resolution.
9
(2) The minimum period t_TLTL should not be less than the number of cycles it takes to execute the capture
interrupt service routine plus 24 t_CYC.
(3) The minimum period t_ILIL should not be less than the number of cycles it takes to execute the interrupt
service routine plus 21 t_CYC.
MC68HC05J3
ELECTRICAL SPECIFICATIONS
TPG
MOTOROLA
9-5