MC908GZ48VFAE Freescale Semiconductor, MC908GZ48VFAE Datasheet - Page 90
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MC908GZ48VFAE
Manufacturer Part Number
MC908GZ48VFAE
Description
IC MCU 16K FLASH 8MHZ 48-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908GZ60CFJE.pdf
(352 pages)
Specifications of MC908GZ48VFAE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
37
Program Memory Size
48KB (48K x 8)
Program Memory Type
FLASH
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 24x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC908GZ48VFAE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Clock Generator Module (CGM)
External factors, however, can cause drastic changes in the operation of the PLL. These factors include
noise injected into the PLL through the filter capacitor, filter capacitor leakage, stray impedances on the
circuit board, and even humidity or circuit board contamination.
4.8.3 Choosing a Filter
As described in
stability and reaction time of the PLL. The PLL is also dependent on reference frequency and supply
voltage.
Figure 4-9
the PLL are not critical, the three component filter network shown in
single capacitor, C
components at various reference frequencies. For reference frequencies between the values listed in the
table, extrapolate to the nearest common capacitor value. In general, a slightly larger capacitor provides
more stability at the expense of increased lock time.
90
shows two types of filter circuits. In low-cost applications, where stability and reaction time of
4.8.2 Parametric Influences on Reaction
F
1 MHz
2 MHz
3 MHz
4 MHz
5 MHz
6 MHz
7 MHz
8 MHz
f
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
, as shown in shown in
RCLK
C
CGMXFC
F
Table 4-5. Example Filter Component Values
V
(A)
SSA
8.2 nF
4.7 nF
3.3 nF
2.2 nF
1.8 nF
1.5 nF
1.2 nF
1 nF
C
F1
Figure 4-9. PLL Filter
Figure 4-9
820 pF
470 pF
330 pF
220 pF
180 pF
150 pF
120 pF
100 pF
C
(A). Refer to
F2
Time, the external filter network is critical to the
C
R
F1
CGMXFC
F1
Table 4-5
R
Figure 4-9
2k
2k
2k
2k
2k
2k
2k
2k
(B)
F1
V
SSA
C
F2
for recommended filter
(B) can be replaced by a
6.8 nF
5.6 nF
4.7 nF
3.9 nF
3.3 nF
2.7 nF
2.2 nF
18 nF
C
Freescale Semiconductor
F
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