MCF51JM64 FREESCALE [Freescale Semiconductor, Inc], MCF51JM64 Datasheet - Page 30

• Manufacturer Part Number: MCF51JM64
• Description: MCF51JM128 ColdFire Microcontroller
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Preliminary Electrical Characteristics
2.11.2
Synchronizer circuits determine the shortest input pulses that can be recognized or the fastest clock that can be used as the
optional external source to the timer counter. These synchronizers operate from the current bus rate clock.
30
1
2
3
4
Num
Typical values are based on characterization data at V
This is the shortest pulse guaranteed to be recognized as a reset pin request. Shorter pulses are not guaranteed to override
reset requests from internal sources.
This is the minimum pulse width guaranteed to pass through the pin synchronization circuitry. Shorter pulses may or may not
be recognized. In stop mode, the synchronizer is bypassed so shorter pulses can be recognized in that case.
Timing is shown with respect to 20% V
6
8
7
9
C
Timer/PWM (TPM) Module Timing
Active background debug mode latch hold time
IRQ pulse width
KBIPx pulse width
Port rise and fall time (load = 50 pF)
Asynchronous path
Synchronous path
Asynchronous path
Synchronous path
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
RESET PIN
Parameter
3
3
2
2
IRQ/KBIPx
IRQ/KBIPx
MCF51JM128 ColdFire Microcontroller, Rev. 2
DD
and 80% V
Figure 11. IRQ/KBIPx Timing
Table 17. Control Timing
Figure 10. Reset Timing
4
DD
DD
levels. Temperature range –40°C to 105°C.
= 5.0V, 25°C unless otherwise stated.
t
t
IHIL
ILIH
t
t
t
t
extrst
Symbol
Rise
ILIH,
ILIH,
t
MSH
, t
t
t
IHIL
IHIL
Fall
1.5 x t
1.5 x t
Min
100
100
100
—
—
cyc
cyc
Typ
30
—
—
3
1
Freescale Semiconductor
Max
—
—
—
Unit
ns
ns
ns
ns