mc9s08qe16c Freescale Semiconductor, Inc, mc9s08qe16c Datasheet - Page 21

• Manufacturer Part Number: mc9s08qe16c
• Description: 8-bit Hcs08 Central Processor Uni
• Manufacturer: Freescale Semiconductor, Inc

3.10.2
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.
Freescale Semiconductor
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 pin request. Shorter pulses are not guaranteed to
override reset requests from internal sources.
To enter BDM mode following a POR, BKGD/MS must be held low during the power-up and for a hold time of t
rises above V
This is the minimum pulse width that is 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
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)
Voltage regulator recovery time
TPM Module Timing
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
5
IRQ/KBIPx
2
Rating
KBIPx
MC9S08QE32 Series MCU Data Sheet, Rev. 3
DD
Table 12. Control Timing (continued)
and 80% V
Figure 14. IRQ/KBIPx Timing
Figure 13. 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
ILIH,
Rise
Rise
t
VRR
, t
, t
t
IHIL
Fall
Fall
1.5 x t
Min
100
—
—
—
—
—
cyc
Typical
Electrical Characteristics
31
24
—
—
8
7
4
1
Max
—
—
—
—
—
—
—
MSH
after V
Unit
ns
ns
ns
μs
DD
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