mcf51qe128 Freescale Semiconductor, Inc, mcf51qe128 Datasheet - Page 22

• Manufacturer Part Number: mcf51qe128
• Description: Mcf51qe Flexis 32-bit Coldfire? V1 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Electrical Characteristics
22
1
2
3
4
5
Num
Typical values are based on characterization data at V
This is the shortest pulse that is guaranteed to be recognized as a reset or interrupt pin request. Shorter pulses are not
guaranteed to override reset requests from internal sources.
To enter BDM mode following a POR, BKGD/MS should be held low during the power-up and for a hold time of t
rises above V
This is the minimum assertion time in which the interrupt may be recognized. The correct protocol is to assert the interrupt
request until it is explicitly negated by the interrupt service routine.
Timing is shown with respect to 20% V
10
8
9
C
D
C
C
Keyboard interrupt pulse width
Port rise and fall time —
Low output drive (PTxDS = 0) (load = 50 pF)
Port rise and fall time —
High output drive (PTxDS = 1) (load = 50 pF)
Stop3 recovery time, from interrupt event to vector fetch
Asynchronous path
Synchronous path
LVD
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
Slew rate control enabled (PTxSE = 1)
Slew rate control disabled (PTxSE = 0)
.
RESET PIN
MCF51QE128 Series Advance Information Data Sheet, Rev. 4
4
IRQ/KBIPx
2
Rating
KBIPx
DD
Table 12. Control Timing (continued)
and 80% V
Figure 15. IRQ/KBIPx Timing
Figure 14. Reset Timing
DD
DD
5
levels. Temperature range –40°C to 85°C.
= 3.0V, 25°C unless otherwise stated.
t
t
IHIL
ILIH
t
extrst
t
t
t
Symbol
t
ILIH,
Rise
Rise
STPREC
, t
, t
t
IHIL
Fall
Fall
2 x t
Min
100
—
—
—
—
—
cyc
Typ
TBD
TBD
TBD
TBD
—
—
6
Freescale Semiconductor
1
Max
10
—
—
—
—
—
—
MSH
after V
Unit
ns
ns
ns
μs
DD