mc68hc11k4 Freescale Semiconductor, Inc, mc68hc11k4 Datasheet - Page 259

• Manufacturer Part Number: mc68hc11k4
• Description: Mc68hc11k1 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

12.8 Control Timing
M68HC11K Family
MOTOROLA
Frequency of operation
E-clock period
Crystal frequency
External oscillator frequency
Processor control setup time
Reset input pulse width
Mode programming setup time
Mode programming hold time
Interrupt pulse width,
Wait recovery startup time
Timer pulse width
1. V
2. Reset is recognized during the first clock cycle it is held low. Internal circuitry then drives the pin low for eight clock cycles,
3. Can be pre-empted by internal reset
t
t
To guarantee external reset vector
Minimum input time
IRQ edge-sensitive mode
PW
PW
Input capture, pulse accumulator
PCSU
PCSU
All timing measurements refer to 20% V
releases the pin, and samples the pin level two cycles later to determine the source of the interrupt.
DD
(extended voltage devices)
IRQ
TIM
= 1/4 t
= 1/4 t
= 4.5 to 5.5 Vdc for standard devices, V
= t
= t
cyc
cyc
PA[3:0]
PA[3:0]
cyc
cyc
PA7
PA7
Notes:
+ 20 ns
+ 20 ns
Characteristic
1. Rising edge sensitive input
2. Falling edge sensitive input
3. Maximum pulse accumulator clocking rate is E-clock frequency divided by 2.
+ 50 ns
+ 75 ns
1,3
2,3
1
2
(3)
(2)
(1)
Freescale Semiconductor, Inc.
PW
TIM
For More Information On This Product,
DD
Figure 12-2. Timer Inputs
and 70% V
Go to: www.freescale.com
SS
Electrical Characteristics
= 0 Vdc, T
Symbol
PW
PW
PW
t
f
t
t
t
PCSU
4 f
XTAL
t
WRS
MPS
MPH
f
cyc
o
RSTL
IRQ
TIM
DD
o
, unless otherwise noted.
A
= T
1000
1020
1020
Min
300
325
16
10
dc
—
dc
—
1.0 MHz
1
2
L
to T
Max Min Max Min Max Min Max
H
1.0
4.0
4.0
—
—
—
—
—
—
—
—
—
4
500
175
200
520
520
16
10
2.0 MHz
dc
—
dc
—
1
2
2.0
8.0
8.0
—
—
—
—
—
—
—
—
—
4
333
133
158
353
353
dc
dc
16
10
3.0 MHz
—
—
1
2
Electrical Characteristics
12.0
12.0
3.0
—
—
—
—
—
—
—
—
—
4
250
112
270
270
16
10
dc
—
dc
—
—
4.0 MHz
1
2
Technical Data
Control Timing
16.0 MHz
16.0 MHz
4.0
—
—
—
—
—
—
—
—
—
4
MHz
Unit
t
t
t
ns
ns
ns
ns
ns
cyc
cyc
cyc
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