MPC8536EBVTATH datasheet(31/128 Pages) FREESCALE

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RESET Initialization

MPC8536E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 2

Freescale Semiconductor

2.4.6

Platform to FIFO Restrictions

Please note the following FIFO maximum speed restrictions based on platform speed. The “platform clock (CCB) frequency”

in the following formula refers to the maximum platform (CCB) frequency of the speed bins the part belongs to, which is

defined in Table 73.

For FIFO GMII mode:

FIFO TX/RX clock frequency <= platform clock frequency/3.2

For example, if the platform frequency is 533 MHz, the FIFO TX/RX clock frequency should be no more than 167 MHz

For FIFO encoded mode:

FIFO TX/RX clock frequency <= platform clock frequency/3.2

For example, if the platform frequency is 533 MHz, the FIFO TX/RX clock frequency should be no more than

167 MHz

2.4.7

Other Input Clocks

For information on the input clocks of other functional blocks of the platform such as SerDes, and eTSEC, see the specific

section of this document.

2.5

RESET Initialization

This section describes the AC electrical specifications for the RESET initialization timing requirements of the MPC8536E.

Table 10 provides the RESET initialization AC timing specifications for the DDR SDRAM component(s).

Table 11 provides the PLL lock times.

Table 10. RESET Initialization Timing Specifications

Parameter/Condition

Min

Max

Unit

Notes

Required assertion time of HREST

100

—

μs—

Minimum assertion time for SRESET

3—

Sysclk

PLL input setup time with stable SYSCLK before HRESET negation

100

—

μs—

Input setup time for POR configurations (other than PLL config) with respect to negation of

HRESET

—

SYSCLKs

Input hold time for all POR configurations (including PLL config) with respect to negation of

HRESET

—

SYSCLKs

Maximum valid-to-high impedance time for actively driven POR configurations with respect to

negation of HRESET

—

SYSCLKs

HRESET rise time

—

SYSCLK

—

Notes:

1. SYSCLK is the primary clock input for the MPC8536E.

Table 11. PLL Lock Times

Parameter/Condition

Min

Max

Unit

Notes

PLL lock times

—

100

μs—

Local bus PLL

—

μs—

PCI bus lock time

—

μs—

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