Technical data

Programming Details
MVME4100 Single Board Computer Programmer’s Reference (6806800H19B)
69
4.13 Clock Distribution
The clock function generates and distributes all of the clocks required for system operation.
The PCI-E clocks are generated using a four output differential clock driver. The PCI/PCI-X bus
clocks are generated using a MPC9855 clock generator. Additional clocks required by
individual devices are generated near the devices using individual oscillators. The following
table lists the clocks required on the MVME4100 along with their frequency and source.
Table 4-12 Clock Assignments
Device Clock Signal
Frequency
(MHz) Clock Tree Source Qty VIO
MPC8548E CLK_CPU 66 Oscillator 1 +3.3 V
MPC8548E CLK125MHZ 125 Oscillator 1 +2.5 V
MPC8548E CLK_RTC 1 PLD 1 +3.3 V
MPC8548E CLK_PCI 66/100 MPC9855 1 +3.3 V
PMC1 CLK_PCI1 33/66/100 MPC9855 1 +3.3 V
PMC2 CLK_PCI2 33/66/100 MPC9855 1 +3.3 V
Tsi148 CLK_PCI3 66/100 MPC9855 1 +3.3 V
USB CLK_PCI4 33 MPC9855 1 +3.3 V
BCM5482S CLK2_25MHZ 25 Oscillator/Buffer 1 +2.5 V
BCM5482S CLK3_25MHZ 25 Oscillator/Buffer 1 +2.5 V
Control and
Timers PLD
CLK1_25MHZ
CLK_LBP
25
MPX CLK / 8
Oscillator/Buffer
MPC8548E
1
1
+3.3 V
+3.3 V
QUART CLK_1.8M 1.8432 Oscillator 1 +3.3 V
USB CLK_48MHZ 48 Oscillator 1 +3.3 V
RTC CLK_32K 32.768 KHz Crystal 1 +3.3 V
ICS9FG104 CLK4_33MHZ 25 Oscillator/Buffer 1 +3.3 V
MPC8548E CLK_PCIE0 100 ICS9FG104 1 DIFF
XMCspan CLK_PCIE1 100 ICS9FG104 1 DIFF