MPC8540CPX667JC datasheet(54/104 Pages) FREESCALE

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MPC8540 Integrated Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

RapidIO

13 RapidIO

This section describes the DC and AC electrical specifications for the RapidIO interface of the MPC8540.

13.1 RapidIO DC Electrical Characteristics

RapidIO driver and receiver DC electrical characteristics are provided in Table 45 and Table 46,

respectively.

HRESET to PCI-X initialization pattern hold time

tPCRHIX

050

6, 12

Notes:

1.See the timing measurement conditions in the PCI-X 1.0a Specification.

2.Minimum times are measured at the package pin (not the test point). Maximum times are measured with the test

point and load circuit.

3.Setup time for point-to-point signals applies to REQ and GNT only. All other signals are bused.

4.For purposes of active/float timing measurements, the Hi-Z or off state is defined to be when the total current

delivered through the component pin is less than or equal to the leakage current specification.

5.Setup time applies only when the device is not driving the pin. Devices cannot drive and receive signals at the same

time.

6.Maximum value is also limited by delay to the first transaction (time for HRESET high to first configuration access,

tPCRHFV). The PCI-X initialization pattern control signals after the rising edge of HRESET must be negated no

later than two clocks before the first FRAME and must be floated no later than one clock before FRAME is

asserted.

7.A PCI-X device is permitted to have the minimum values shown for tPCKHOV and tCYC only in PCI-X mode. In

conventional mode, the device must meet the requirements specified in PCI 2.2 for the appropriate clock

frequency.

8.Device must meet this specification independent of how many outputs switch simultaneously.

9.The timing parameter tPCIVKH is a minimum of 1.4 ns rather than the minimum of 1.2 ns in the PCI-X 1.0a

Specification.

10.The timing parameter tPCRHFV is a minimum of 10 clocks rather than the minimum of 5 clocks in the PCI-X 1.0a

Specification.

11.Guaranteed by characterization.

12.Guaranteed by design.

Table 45. RapidIO 8/16 LP-LVDS Driver DC Electrical Characteristics

At recommended operating conditions with OVDD of 3.3 V ± 5%.

Characteristic

Symbol

Min

Max

Unit

Notes

Differential output high voltage

VOHD

247

454

1, 2

Differential output low voltage

VOLD

–454

–247

1, 2

Differential offset voltage

ΔV

OSD

—50

1,3

Output high common mode voltage

VOHCM

1.125

1.375

1, 4

Output low common mode voltage

VOLCM

1.125

1.375

1, 5

Table 44. PCI-X AC Timing Specifications at 133 MHz (continued)

Parameter

Symbol

Min

Max

Unit

Notes

MPC8540CPX667JC Datasheet(PDF) 54 Page - Freescale Semiconductor, Inc

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