sc9s08mz16 Freescale Semiconductor, Inc, sc9s08mz16 Datasheet - Page 258

• Manufacturer Part Number: sc9s08mz16
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Appendix A Electrical Characteristics and Timing Specifications
A.9.1
258
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.
When any reset is initiated, internal circuitry drives the reset pin low for about 34 bus cycles and then samples the
level on the reset pin about 38 bus cycles later to distinguish external reset requests from internal requests.
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
1
2
3
4
6
5
7
9
Bus frequency (t
Real-time interrupt internal oscillator period
External reset pulse width
(t
Reset low drive
Active background debug mode latch setup time
Active background debug mode latch hold time
IRQ pulse width
Port rise and fall time (load = 50 pF)
Control Timing
cyc
Asynchronous path
Synchronous path
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
= 1/f
RESET PIN
Self_reset
Figure A-9. Active Background Debug Mode Latch Timing
3
cyc
)
Parameter
= 1/f
4
BKGD/MS
2
Bus
RESET
2
)
SC9S08MZ16 MCU Data Sheet, Rev. 1
DD
Table A-10. Control Timing
Figure A-8. Reset Timing
and 80% V
5
t
MSSU
DD
DD
levels. Temperature range –40°C to 85°C.
= 5.0 V, 25 °C unless otherwise stated.
t
t
Symbol
Rise
t
ILIH,
extrst
t
t
t
MSSU
t
rstdrv
f
t
extrst
MSH
Bus
RTI
, t
t
IHIL
Fall
1.5 × t
t
34 × t
Self_reset
1.5 ×
Min
700
100
DC
25
25
—
—
t
cyc
MSH
cyc
Typical
30
—
—
—
—
—
—
—
3
1
Freescale Semiconductor
1300
Max
10
—
—
—
—
—
—
MHz
Unit
μs
ns
ns
ns
ns
ns
ns