MAC7101MAG40 Freescale Semiconductor, MAC7101MAG40 Datasheet - Page 17

• Manufacturer Part Number: MAC7101MAG40
• Description: IC MCU 32BIT FLASH 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: MAC7xxxr

Specifications of MAC7101MAG40

• Core Processor: ARM7
• Core Size: 32-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SCI, SPI
• Peripherals: DMA, POR
• Number Of I /o: 112
• Program Memory Size: 544KB (544K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 5.5 V
• Data Converters: A/D 32x8/10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

The capacitance C
The stabilization delays shown in
component selection (for example, the crystal and XFC filter).
3.8.2.1
With each transition of the clock f
voltage to the VCO is adjusted accordingly. The adjustment is done continuously with no abrupt changes
in the clock output frequency. Noise, voltage, temperature and other factors cause slight variations in the
control loop resulting in a clock jitter. This jitter affects the real minimum and maximum clock periods as
illustrated in
eliminate the effect of PLL jitter to a large extent.
The relative deviation of t
larger number of clock periods (N). Thus, jitter is defined as:
For N < 100, the following equation is a good fit for the maximum jitter:
Freescale Semiconductor
Jitter Information
Figure
0
J(N)
P
should be chosen in the range of:
4. It is important to note that the pre-scaler used by timers and serial modules will
t
MIN1
t
t
NOM
MAX1
0 1
MAC7100 Microcontroller Family Hardware Specifications, Rev. 1.2
NOM
Figure 5. Maximum Bus Clock Jitter Approximation
1
J N
( )
is at its maximum for one clock period, and decreases towards zero for
CMP
Table 20
5
=
, the deviation from the reference clock f
max 1
C
Figure 4. Jitter Definitions
S
÷
J N
⎛
⎝
2
( )
20
are dependant on PLL operational settings and external
–
t
≤
MIN
t
------------------- -
N t
t
MAX
=
10
MAX
Preliminary
C
⋅
(N)
P
------- -
NOM
j
(N)
( )
≤
1
N
N
C
+
S
,
j
3
2
÷
1
10
–
------------------- -
N t
t
15
MIN
⋅
( )
NOM
N
N–1
⎞
⎠
20
REF
N
Electrical Characteristics
is measured and input
N
Eqn. 14
Eqn. 15
Eqn. 16
17