TSI148-133CL IDT, Integrated Device Technology Inc, TSI148-133CL Datasheet - Page 123

• Manufacturer Part Number: TSI148-133CL
• Description: IC PCI-VME BRIDGE 456PBGA
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: Tsi148&Trade;r

Specifications of TSI148-133CL

• Applications: PCI-to-VME Bridge
• Interface: PCI
• Voltage - Supply: 3.3V
• Package / Case: 456-PBGA
• Mounting Type: Surface Mount
• Package Type: BGA
• Rad Hardened: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 800-1906

5.3
Table 5: PCI Bus Configuration
Tsi148 PCI/X-to-VME Bus Bridge User Manual
80A3020_MA001_13
FRAME__
1
1
1
1
1
Clocks
Tsi148 clocks are derived from the PCI/X bus clock. The PCI/X bus clock frequency can be
33, 66, 100, or 133 MHz.
The PCI/X clock frequency and bus mode is configured on the rising edge of LRSTI_ (see
Table
The PCI bus configuration signals are latched on the negation of LRSTI_. The Tsi148 expects
the PCI bus configuration signals to be valid from the time the PLL reset input is negated
(PLL_RSTI_) and remain valid until the LRSTI_ signal is negated. This allows the internal
PLL to lock to the PCI/X bus clock.
The configuration signals are only latched on the first rising edge of LRSTI_. If LRSTI_ is
asserted at a later time, the configuration signals are not latched again. However, if both
PURSTI_ and LRSTI_ are reasserted, then the configuration signal latches are opened and the
configuration signals are latched on the rising edge of LRSTI_.
The configuration signals are only latched once to make sure the PLL clock remains stable
through a PCI/X bus reset. This stability enables a subset of the VMEbus logic to function
while the PCI/X bus is in reset, including: the VMEbus SYSCLK, VMEbus arbiter, VMEbus
daisy chain signals, VMEbus General Control and Status register access, and VMEbus
Control and Control and Status register accesses.
IRDY_
1
1
1
1
1
5)
PCLK operation below 33 MHz is not recommended.
DEVSEL_
PCI Bus Signal
1
1
1
1
1
STOP_
1
1
1
0
0
TRDY_
1
1
0
1
0
5. Resets, Clocks, and Power-up Options > Clocks
M66EN
X
X
X
0
1
PCI-X
PCI-X
PCI-X
Mode
PCI
Bus
PCI
PCI
Min
33.3
66.6
100
50
50
PCI Clock
Frequency
(MHz)
133.3
Max
33.3
66.6
66.6
100
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