參數(shù)資料
型號(hào): MPC97R73FA
廠(chǎng)商: MOTOROLA INC
元件分類(lèi): 時(shí)鐘及定時(shí)
英文描述: PLL BASED CLOCK DRIVER, 12 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP52
封裝: LQFP-52
文件頁(yè)數(shù): 3/20頁(yè)
文件大小: 252K
代理商: MPC97R73FA
MPC97R73
TIMING SOLUTIONS
11
MOTOROLA
SYNC Output Description
The MPC97R73 has a system synchronization pulse
output QSYNC. In configurations with the output frequency
relationships are not integer multiples of each other QSYNC
provides a signal for system synchronization purposes. The
MPC97R73 monitors the relationship between the A bank
and the B bank of outputs. The QSYNC output is asserted
(logic low) one period in duration and one period prior to the
coincident rising edges of the QA and QC outputs. The
duration and the placement of the pulse is dependent QA and
QC output frequencies: the QSYNC pulse width is equal to
the period of the higher of the QA and QC output frequencies.
Figure 6. shows various waveforms for the QSYNC output.
The QSYNC output is defined for all possible combinations of
the bank A and bank C outputs.
fVCO
1:1 Mode
QA
QC
QSYNC
2:1 Mode
QC(
÷2)
QA(
÷6)
QSYNC
3:1 Mode
QA
QC
QSYNC
QA(
÷4)
QC(
÷6)
QSYNC
3:2 Mode
QC(
÷2)
QA(
÷8)
QSYNC
4:1 Mode
QA(
÷6)
QC(
÷8)
QSYNC
4:3 Mode
QA(
÷12)
QC(
÷2)
QSYNC
6:1 Mode
Figure 6. QSYNC Timing Diagram
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