MPC9772FA データシートの表示（PDF） - Motorola => Freescale
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MPC9772FA Datasheet PDF : 16 Pages
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MPC9772
Table 1. Pin Configuration
Pin
CCLK0
CCLK1
XTAL_IN, XTAL_OUT
FB_IN
CCLK_SEL
REF_SEL
VCO_SEL
PLL_EN
MR/OE
FSEL_A[0:1]
FSEL_B[0:1]
FSEL_C[0:1]
FSEL_FB[0:2]
INV_CLK
STOP_CLK
STOP_DATA
QA[0-3]
QB[0-3]
QC[0-3]
QFB
QSYNC
GND
VCC_PLL
I/O
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Output
Output
Output
Output
Output
Supply
Supply
VCC
Supply
Type
LVCMOS
LVCMOS
Analog
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
LVCMOS
Ground
VCC
VCC
Function
PLL reference clock
Alternative PLL reference clock
Crystal oscillator interface
PLL feedback signal input, connect to an QFB
LVCMOS clock reference select
LVCMOS/PECL reference clock select
VCO operating frequency select
PLL enable/PLL bypass mode select
Output enable/disable (high-impedance tristate) and device reset
Frequency divider select for bank A outputs
Frequency divider select for bank B outputs
Frequency divider select for bank C outputs
Frequency divider select for the QFB output
Clock phase selection for outputs QC2 and QC3
Clock input for clock stop circuitry
Configuration data input for clock stop circuitry
Clock outputs (Bank A)
Clock outputs (Bank B)
Clock outputs (Bank C)
PLL feedback output. Connect to FB_IN.
Synchronization pulse output
Negative power supply
PLL positive power supply (analog power supply). It is recommended to use an external RC
filter for the analog power supply pin VCC_PLL. Please see applications section for details.
Positive power supply for I/O and core. All VCC pins must be connected to the positive power
supply for correct operation
Table 2. Function Table (Configuration Controls)
Control Default
0
1
REF_SEL
1 Selects CCLKx as the PLL reference clock
Selects the crystal oscillator as the PLL
reference clock
CCLK_SEL
1 Selects CCLK0
Selects CCLK1
VCO_SEL
1 Selects VCO÷2. The VCO frequency is scaled by a factor of 2 (low VCO Selects VCO÷1. (high VCO frequency range)
frequency range).
PLL_EN
1 Test mode with the PLL bypassed. The reference clock is substituted for the Normal operation mode with PLL enabled.
internal VCO output. MPC9772 is fully static and no minimum frequency limit
applies. All PLL related AC characteristics are not applicable.
INV_CLK
1 QC2 and QC3 are in phase with QC0 and QC1
QC2 and QC3 are inverted (180° phase shift)
with respect to QC0 and QC1
MR/OE
1 Outputs disabled (high-impedance state) and device is reset. During reset/ Outputs enabled (active)
output disable the PLL feedback loop is open and the internal VCO is tied to
its lowest frequency. The MPC9772 requires reset after any loss of PLL lock.
Loss of PLL lock may occur when the external feedback path is interrupted.
The length of the reset pulse should be greater than one reference clock
cycle (CCLKx). The device is reset by the internal power-on reset (POR)
circuitry during power-up.
VCO_SEL, FSEL_A[0:1], FSEL_B[0:1], FSEL_C[0:1], FSEL_FB[0:2] control the operating PLL frequency range and input/output frequency ratios.
See Table 3 to Table 6 and the applications section for supported frequency ranges and output to input frequency ratios.
TIMING SOLUTIONS
3
MOTOROLA
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