Boot Assist Module (BAM)MPC5566 Microcontroller Reference Manual, Rev. 216-10 Freescale Semiconductor• Sets the EXTM bit that enables the EBI for external master operation• Configures the EBI for external arbitration by setting the EARB bit.• Configures the EBI signals BB, BG, BR for bus arbitration. Refer to Table 16-6.Table 16-6. External Bus Interface ConfigurationPins 11 Refer to Chapter 12, “External Bus Interface (EBI),” since some signals are not implemented on all devices.Function AfterDevice ResetFunction and Value After BAM ExecutionSerial Boot Mode 2orInternal Boot Mode2 These values are for serial boot mode only when entered directly using the BOOTCFG signals.External Bootwith no Arbitration 3(Single-master Mode)3 If serial boot is entered indirectly from external boot mode because a valid RCHW was not found, the EBI remains configuredaccording to these columns.External Bootwith External Arbitration 3(Multi-master Mode)Function Function Function PCRValue Function PCRValueADDR[8:31] GPIO GPIO ADDR[8:31] 0x0440 ADDR[8:31] 0x0440DATA[16:31] GPIO GPIO GPIO orDATA[16:31] 44 If the BAM reads a valid RCHW with the PS0 bit clear, DATA[16:31] are reconfigured from GPIO to data bus signals by writing0x0440 to the pad configuration registers (PCRs).Default or0x1440 4GPIO orDATA[16:31] 4Default or0x1440 4DATA[0:15] GPIO GPIO DATA[0:15] 0x0440 DATA[0:15] 0x0440TEA GPIO GPIO GPIO Default 55 The BAM does not write to the PCR for this signal; the value is the PCR default value. Refer to Chapter 6, “System IntegrationUnit (SIU)” for the signal PCR default values.GPIO Default 5CS[0] GPIO GPIO CS[0] 0x0443 CS[0] 0x0443CS[1:3] GPIO GPIO GPIO Default 5 GPIO Default 5WE/BE[0] GPIO GPIO WE[0] 0x0443 WE/BE[0] 0x0443WE/BE[1:3] GPIO GPIO GPIO Default 5 GPIO Default 5OE GPIO GPIO OE 0x0443 OE 0x0443TS GPIO GPIO TS 0x0443 TS 0x0443TA GPIO GPIO GPIO Default 5 GPIO Default 5RD_WR GPIO GPIO GPIO Default 5 GPIO Default 5BDIP GPIO GPIO GPIO Default 5 GPIO Default 5BB GPIO GPIO GPIO Default 5 BB 0X0443BG GPIO GPIO GPIO Default 5 BG 0X0443BR GPIO GPIO GPIO Default 5 BR 0X0443TSIZ[0:1] GPIO GPIO GPIO Default 5 GPIO Default 5
