MC9S08SG32 Datasheet, PDF (314/328 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Appendix A Electrical Characteristics
A.12 AC Characteristics
This section describes ac timing characteristics for each peripheral system.
A.12.1 Control Timing
Table A-13. Control Timing
Num C
Rating
Symbol
Min
Temp
Rated
Typ¹ Max Unit
Bus frequency
1
D ^{(tcyc = 1/fBus)}
-40 C to 125 C f_Bus
> 125 C
dc
—
20 MHz ^♦ —
dc
—
18 MHz — ♦
Internal low power
2
D ^{oscillator period}
-40 C to 125 C _tLPO
700
> 125 C
600
3 D _{External reset pulse width}²
t_extrst
100
1500 μs ^♦ —
1500 μs — ♦
— ns ♦ ♦
4 D _{Reset low drive}³
t_rstdrv
66 x t_cyc
— ns ♦ ♦
Pin interrupt pulse width
5D
Asynchronous path²
Synchronous path⁴
t_ILIH, t_IHIL
100
1.5 x t_cyc
—
—
ns ^{♦ ♦}
Port rise and fall time —
Low output drive (PTxDS = 0) (load = 50 pF)⁵
Slew rate control
disabled (PTxSE = 0) _{tRise, tFall}
—
Slew rate control
enabled (PTxSE = 1)
—
6
C
Port rise and fall time —
High output drive (PTxDS = 1) (load = 50 pF)⁵
40
—
♦♦
ns
75
—
♦♦
Slew rate control
disabled (PTxSE = 0)
t_Rise, t_Fall
—
Slew rate control
enabled (PTxSE = 1)
t_Rise, t_Fall
—
11
—
♦♦
ns
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 _{When any reset is initiated, internal circuitry drives the reset pin low for about 66 cycles of tcyc. After POR reset, the bus clock}
frequency changes to the untrimmed DCO frequency (f_reset = (f_{dco_ut})/4) because TRIM is reset to 0x80 and FTRIM is reset
to 0, and there is an extra divide-by-two because BDIV is reset to 0:1. After other resets trim stays at the pre-reset value.
4 _{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.
5 _{Timing is shown with respect to 20% VDD and 80% VDD levels. Temperature range –40°C to 125°C.}
MC9S08SG32 Data Sheet, Rev. 7
314
Freescale Semiconductor