MPC8536-RDK Freescale Semiconductor, MPC8536-RDK Datasheet - Page 211

• Manufacturer Part Number: MPC8536-RDK
• Description: BOARD REF COMEXPRESS MPC8536
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC ™r
• Type: MPUr

Specifications of MPC8536-RDK

• Contents: CSB1880, CSB1801, Cables, Documentation, Enclosure, Power Supply with cord
• For Use With/related Products: MPC8536
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16-bit addressable EEPROM memories are supported and detected automatically by the boot code. This
is accomplished by the boot code trying 16-bit mode if it fails to find the “BOOT” signature when in 24-bit
mode.
Figure 4-15
Output) modes of operation with a 24-bit addressable eSPI memory. With 16-bit addressable eSPI
memories, only a 16-bit address is transmitted, and valid data is received from the EEPROM on the 24th
SPI_CLK cycle rather than the 32nd SPI_CLK cycle for 24-bit addressable memories.
4.5.1.3
During boot from the on-chip ROM (for boot targets of either eSPI or SD/MMC), the user specifies 32-bit
addresses for several fields (Target Address for copying the user’s code, and the Execution Starting
Address). This section describes how these 32-bit effective addresses are translated into 36-bit real
addresses and the associated address translation and mapping.
The L2 cache remains disabled as per its power-on reset state. The e500 Level 1 and Level 2 MMU
configuration is left as per defaults, with the exception that the following TLB1 Entry 1 is also created (in
addition to the default TLB1 Entry 0 4kByte page at 0x0_FFFF_Fnnnn):
Freescale Semiconductor
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SPI_MOSI
SPI_MISO
SPI_CLK
SPI_CS n
V=1 (valid)
TS=0 (address space 0)
TID=0x00 (global)
EPN[32–51]=0x00000
RPN[32–51]=0x00000
SIZE[0–3]=1011 (4 Gbyte)
SX/SR/SW=111 (Full supervisor mode access allowed)
shows the read instruction timing diagram for normal (not Atmel RapidS or Winbond Dual
Figure 4-15. Read Instruction Timing Diagram (24-bit addressable eSPI memory)
Default e500 Addressing During System Boot
MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1
0
1
2
8-bit Instruction
3
0x03
4
High-Impedance
5
6
7
8
MSB
23 22 21
9
10 11
24-bit Address
Reset, Clocking, and Initialization
30 31 32 33 34 35
1
0
Data from EEPROM
MSB
4-41