mpc5644a Freescale Semiconductor, Inc, mpc5644a Datasheet - Page 63

• Manufacturer Part Number: mpc5644a
• Description: Mpc5644a Microcontroller Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

2.5
Signal details
CLKOUT
ENGCLK
EXTAL
PLLREF
XTAL
DSPI_B_SCK_LVDS-
DSPI_B_SCK_LVDS+
DSPI_B_SOUT_LVDS-
DSPI_B_SOUT_LVDS+
DSPI_C_SCK_LVDS-
DSPI_C_SCK_LVDS+
DSPI_C_SOUT_LVDS-
DSPI_C_SOUT_LVDS+
PCS_B[0]
PCS_C[0]
PCS_D[0]
Signal
Clock Generation
Clock Generation
Clock Generation
Clock Generation
Reset/Configuration
Clock Generation
DSPI
DSPI
DSPI
DSPI
DSPI_B - DSPI_D
Module or Function
Table 5. Signal details
Input pin for an external crystal oscillator or an external clock
source based on the value driven on the PLLREF pin at reset.
PLLREF is used to select whether the oscillator operates in xtal
mode or external reference mode from reset. PLLREF=0 selects
external reference mode. On the 324BGA package, PLLREF is
bonded to the ball used for PLLCFG[0] for compatibility with
MPC55xx devices .
For the 176-pin QFP and 208-ball BGA packages:
For the 324 ball BGA package:
Crystal oscillator input
LVDS pair used for DSPI_B TSB mode transmission
LVDS pair used for DSPI_B TSB mode transmission
LVDS pair used for DSPI_C TSB mode transmission
Peripheral chip select when device is in master mode—slave
select when used in slave mode
MPC5644A clock output for the external/calibration bus interface
Clock for external ASIC devices
LVDS pair used for DSPI_C TSB mode transmission
0: External reference clock is selected.
1: XTAL oscillator mode is selected
If RSTCFG is 0:
If RSTCFG is 1, XTAL oscillator mode is selected.
0: External reference clock is selected.
1: XTAL oscillator mode is selected.
Description