mc9s08qe4 Freescale Semiconductor, Inc, mc9s08qe4 Datasheet - Page 18

• Manufacturer Part Number: mc9s08qe4
• Description: 8-bit Hcs08 Central Processor Unit
• Manufacturer: Freescale Semiconductor, Inc

1
2
3
4
Electrical Characteristics
3.10
This section describes timing characteristics for each peripheral system.
18
Num
10
11
Data in Typical column was characterized at 3.0 V, 25qC or is typical recommended value.
The resulting bus clock frequency should not exceed the maximum specified bus clock frequency of the device.
This specification applies to any time the FLL reference source or reference divider is changed, trim value changed or changing
from FLL disabled (FBELP, FBILP) to FLL enabled (FEI, FEE, FBE, FBI). If a crystal/resonator is being used as the reference,
this specification assumes it is already running.
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
given interval.
8
9
Table 10. ICS Frequency Specifications (Temperature Range = –40 to 85qC Ambient) (continued)
C
C
C
C FLL acquisition time
C
Total deviation of trimmed DCO output frequency over voltage
and temperature
Total deviation of trimmed DCO output frequency over fixed
voltage and temperature range of 0
Long term jitter of DCO output clock (averaged over 2-ms
interval)
AC Characteristics
Figure 13. Deviation of DCO Output from Trimmed Frequency (20 MHz, 3.0 V)
4
-60
-40
3
DD
Characteristic
and V
-20
-0.50%
-1.00%
-1.50%
-2.00%
1.00%
0.50%
0.00%
SS
Subject to Change Without Notice
q
C to 70
and variation in crystal oscillator frequency increase the C
MC9S08QE8 Series, Rev. 3
0
q
C
Preliminary
Temperature
20
TBD
40
60
Symbol
t
'f
'f
Acquire
C
dco_t
dco_t
Jitter
80
Min.
—
—
—
—
100
Typical
Freescale Semiconductor
+ 0.5
r0.5
0.02
-1.0
—
Jitter
120
1
percentage for a
Max.
r2
r1
0.2
1
Bus
.
%f
%f
%f
Unit
ms
dco
dco
dco