MPC8377ECVRAGDA datasheet(14/124 Pages) FREESCALE

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MPC8377E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

RESET Initialization

4.2

AC Electrical Characteristics

The primary clock source for the device can be one of two inputs, CLKIN or PCI_CLK, depending on

whether the device is configured in PCI host or PCI agent mode. Table 8 provides the clock input

(CLKIN/PCI_CLK) AC timing specifications for the device.

RESET Initialization

This section describes the DC and AC electrical specifications for the reset initialization timing and

electrical requirements of the MPC8377E.

5.1

RESET DC Electrical Characteristics

Table 9 provides the DC electrical characteristics for the RESET pins of the device.

Table 8. CLKIN AC Timing Specifications

Parameter

Symbol

Min

Typical

Max

Unit

Notes

CLKIN/PCI_CLK frequency

fCLKIN

—

66.666

MHz

1, 6

CLKIN/PCI_CLK cycle time

tCLKIN

—

CLKIN/PCI_CLK rise and fall time

tKH, tKL

0.6

1.0

2.3

CLKIN/PCI_CLK duty cycle

tKHK/tCLKIN

—

CLKIN/PCI_CLK jitter

—

± 150

4, 5

Notes:

1 Caution: The system, core and security block must not exceed their respective maximum or minimum operating frequencies.

2 Rise and fall times for CLKIN/PCI_CLK are measured at 0.4 V and 2.7 V.

3 Timing is guaranteed by design and characterization.

4 This represents the total input jitter-short term and long term-and is guaranteed by design.

5 The CLKIN/PCI_CLK driver’s closed loop jitter bandwidth should be <500 kHz at -20 dB. The bandwidth must be set low to

allow cascade-connected PLL-based devices to track CLKIN drivers with the specified jitter.

6 Spread spectrum is allowed up to 1% down-spread on CLKIN/PCI_CLK up to 60 KHz.

Table 9. RESET Pins DC Electrical Characteristics

Characteristic

Symbol

Condition

Min

Max

Unit

Input high voltage

VIH

—2.0

OVDD + 0.3

Input low voltage

VIL

—

–0.3

0.8

Input current

IIN

——

± 30

μA

Output high voltage

VOH

IOH = –8.0 mA

2.4

—

Output low voltage

VOL

IOL = 8.0 mA

—

0.5

Output low voltage

VOL

IOL = 3.2 mA

—

0.4

Note:

• This table applies for pins PORESET and HRESET. The PORESET is input pin, thus stated output voltages are not relevant.

• HRESET and SRESET are open drain pin, thus VOH is not relevant for these pins.

MPC8377ECVRAGDA Scheda tecnica(PDF) 14 Page - Freescale Semiconductor, Inc

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