MPC8347A datasheet(85/108 Pages) FREESCALE

85 / 108 page

MPC8347EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 3

Freescale Semiconductor

Clocking

Table 58 provides the operating frequencies for the MPC8347EA PBGA under recommended operating

conditions.

Table 57. Operating Frequencies for TBGA

Characteristic 1

The CLKIN frequency, RCWL[SPMF], and RCWL[COREPLL] settings must be chosen so that the resulting csb_clk, MCLK,

LCLK[0:2], and core_clk frequencies do not exceed their respective maximum or minimum operating frequencies. The value

of SCCR[ENCCM], SCCR[USBDRCM]and SCCR[USBMPHCM] must be programmed so that the maximum internal operating

frequency of the Security core and USB modules does not exceed the respective values listed in this table.

533 MHz

667 MHz

Unit

e300 core frequency (core_clk)

266–533

266–667

MHz

Coherent system bus frequency

(csb_clk)

100–266

100–333

MHz

DDR and DDR2 memory bus frequency

(MCLK) 2

The DDR data rate is 2x the DDR memory bus frequency.

100–200

MHz

Local bus frequency

(LCLKn) 3

The local bus frequency is 1/2, 1/4, or 1/8 of the lbiu_clk frequency (depending on LCCR[CLKDIV]) which is in turn 1x or 2x

the csb_clk frequency (depending on RCWL[LBIUCM]).

16.67–133

MHz

PCI input frequency (CLKIN or PCI_CLK)

25–66

MHz

Security core maximum internal operating frequency

133

166

MHz

USB_DR, USB_MPH maximum internal operating frequency

133

166

MHz

Table 58. Operating Frequencies for PBGA

Characteristic 1

The CLKIN frequency, RCWL[SPMF], and RCWL[COREPLL] settings must be chosen so that the resulting csb_clk, MCLK,

LCLK[0:2], and core_clk frequencies do not exceed their respective maximum or minimum operating frequencies. The value

of SCCR[ENCCM], SCCR[USBDRCM]and SCCR[USBMPHCM] must be programmed so that the maximum internal operating

frequency of the Security core and USB modules does not exceed the respective values listed in this table.

266 MHz

333 MHz

400 MHz

Unit

e300 core frequency (core_clk)

200–266

200–333

200–400

MHz

Coherent system bus frequency (csb_clk)

100–266

MHz

DDR memory bus frequency (MCLK) 2

The DDR data rate is 2x the DDR memory bus frequency.

100–133

MHz

Local bus frequency (LCLKn) 3

The local bus frequency is 1/2, 1/4, or 1/8 of the lbiu_clk frequency (depending on LCCR[CLKDIV]) which is in turn 1x or 2x

the csb_clk frequency (depending on RCWL[LBIUCM]).

16.67–133

MHz

PCI input frequency (CLKIN or PCI_CLK)

25–66

MHz

Security core maximum internal operating frequency

133

MHz

USB_DR, USB_MPH maximum internal operating

frequency

133

MHz

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