MC9S08MP16VLC Datasheet, PDF (28/36 Pages) Freescale Semiconductor, Inc – MC9S08MP16 Series Data Sheet

Electrical Characteristics
Table 16. Control Timing (continued)
Num C
Rating
Symbol
Min
Typ¹
Max Unit
7 D Keyboard interrupt pulse width
Asynchronous path⁴
Synchronous path⁵
8 C Port rise and fall time —
Low output drive (PTxDS = 0) (load = 50 pF)⁶
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
t_ILIH, t_IHIL
100
—
1.5 x t_cyc
—
t_Rise, t_Fall
—
40
—
75
ns
—
—
ns
—
—
Port rise and fall time —
High output drive (PTxDS = 1) (load = 50 pF)⁶
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
t_Rise, t_Fall
—
—
ns
11
—
35
—
1 _{Typical values are based on characterization data at VDD = 5.0V, 25C unless otherwise stated.}
2 _{This is the shortest pulse that is guaranteed to be recognized as a reset pin request.}
3 _{To enter BDM mode following a POR, BKGD/MS should be held low during the power-up and for a hold time of tMSH after VDD rises}
above V_LVD.
4 _{This is the minimum pulse width that is guaranteed to be recognized as a keyboard interrupt request in stop mode.}
5 _{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.
6 _{Timing is shown with respect to 20% VDD and 80% VDD levels. Temperature range –40C to 125C.}
RESET PIN
t_extrst
Figure 17. Reset Timing
t_IHIL
KBIxPn
KBIxPn
t_ILIH
Figure 18. KBIxPn Timing
2.14.2 FTM Module Timing
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 FTM timer counter. These synchronizers operate from the current ICSOUT clock. The ICSOUT
clock period = 0.5  t_cyc = 1/(f_Bus  2).
Table 17. FTM Input Timing
No. C
Function
1
D External clock frequency
2
D External clock period
3
D External clock high time
Symbol
f_TCLK
t_TCLK
t_clkh
Min
0
2
0.75
Max
f_ICSOUT/4¹
—
—
Unit
Hz
t_cyc
t_cyc
MC9S08MP16 Series Data Sheet, Rev. 2
28
Freescale Semiconductor