mc9rs08la8 Freescale Semiconductor, Inc, mc9rs08la8 Datasheet - Page 17

• Manufacturer Part Number: mc9rs08la8
• Description: 8-bit Rs08 Central Processor Unit
• Manufacturer: Freescale Semiconductor, Inc

3.8
This section describes ac timing characteristics for each peripheral system.
3.8.1
1
2
3
Freescale Semiconductor
Bus frequency (t
Real time interrupt internal oscillator period
External RESET pulse width
KBI pulse width
KBI pulse width in stop
Port rise and fall time (load = 50 pF)
This is the shortest pulse that is guaranteed to pass through the pin input filter circuitry. Shorter pulses may or may not be
recognized.
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
6
Slew rate control disabled (PTxSE = 0)
Slew rate control enabled (PTxSE = 1)
Jitter is the average deviation from the programmed frequency measured over the specified interval at maximum f
Measurements are made with the device powered by filtered supplies and clocked by a stable external clock signal. Noise
injected into the FLL circuitry via V
for a given interval.
AC Characteristics
Control Timing
2
cyc
= 1/f
1
Bus
Parameter
)
1
Figure 9. Typical Crystal or Resonator Circuit
3
DD
MC9RS08LA8 Series MCU Data Sheet, Rev. 1
C
1
DD
EXTAL
and V
and 80% V
SS
Table 10. Control Timing
and variation in crystal oscillator frequency increase the C
Crystal or Resonator
DD
levels. Temperature range –40°C to 85°C.
XOSC
R
F
t
Symbol
t
Rise
t
KBIPWS
KBIPW
t
f
extrst
t
Bus
RTI
, t
Fall
XTAL
1.5 t
Min
700
150
100
R
—
—
0
S
C
cyc
2
Typical
1000
11
35
—
—
—
—
Electrical Characteristics
Jitter
1300
Max
10
—
—
—
—
—
percentage
BUS
MHz
Unit
μs
ns
ns
ns
ns
.
17