Control Timing - Motorola MC68HC05T16 Technical Data Manual

14.7

Control Timing

=5.0Vdc ±10%, V
(V
DD
CHARACTERISTICS
Frequency of operation
Crystal option
External clock option
Internal operating frequency
Crystal (f
OSC
External clock (f
Cycle time (1/f
OP
Crystal oscillator start-up time
Stop recovery start-up time
RESET pulse width
IRQ pulse width low (edge-triggered)
IRQ pulse period
ADC comparator stabilization time
ADC comparator conversion time
Timer resolution
Timer TCAP pulse width
Timer TCAP period
Notes:
1. The minimum period t
IRQ interrupt service routine plus 21t
2. Depending on the active edge of TCAP, either t
TCAP pulse width applies.
3. The minimum period t
the input capture interrupt service routine plus 24t
MC68HC05T16
Table 14-6 Control Timing for 5V Operation
=0Vdc, temperature range=0 to 70°C)
SS
/2)
/2)
OSC
)
should not be less than the number of cycle times it takes to execute the
ILIL
.
CYC
should not be less than the number of cycle times it takes to execute
TLTL
ELECTRICAL SPECIFICATIONS
SYMBOL MINIMUM MAXIMUM
f –
OSC
f dc
OSC
f –
OP
f dc
OP
t 480
CYC
t –
OXOV
t –
ILCH
t 1.5
RL
t 125
ILIH
t
see note 1
ILIL
t –
SETTLE
t 2
CONV
t
4
RESL
t , t
125
(see note 2)
TH TL
t
see note 3
TLTL
, the high TCAP pulse width, or t
TH
.
CYC
UNIT
4.2 MHz
4.2 MHz
2.1 MHz
2.1 MHz
– ns
100 ms
100 ms
– t
CYC
– ns
– t
CYC
µs
10
3 t
CYC
– t
CYC
– ns
– t
CYC
, the low
TL
TPG
MOTOROLA
14-5
14