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System Memory
JTAG
MPC5xx
Core
+
FPU
QADC64E
TPU3
1.2 System Memory
1.2.1 External Flash
One on-board Flash ROM (U4) is used in the system. The Am29BDD160G device contains
16Mbits of non-volatile storage (1 M x 16-bit/512 K x 32-bit) giving a total of 2MBytes of Flash
memory. This device requires a 32 bit wide port and must be written in 32 bit word size data. It
may be read in bytes, half words, or words. Wait states are required to access in asynchronous mode
and the same wait state delay is required during the first cycle of a burst type access. Refer to the
specific device data sheet and sample software provided for configuring the flash memory. User
should note that the debug monitor firmware is installed in this flash device. Development tools
or user application programs may erase or corrupt the debug monitor. If the debug monitor
becomes corrupted and it's operation is desired, the firmware must be programmed into the flash
by applying a development port tool such as BDM or Nexus. User should use caution to avoid this
situation. The upper 1 MByte is used to store the MPC564EVB dBUG debugger/monitor firmware
(0x0090_0000 to 0x009F_FFFF).
1-4
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
512 Kbytes
Flash*
Burst
Buffer
Controller 2
DECRAM
(2Kbytes)
Nexus
L-BUS
32K CALRAM
28 Kbytes
4-Kbyte Overlay
QSMCM
QADC64E
8-Kbyte
TPU3
DPTRAM
Figure 1-2. MPC564 Block Diagram
MPC564EVB User's Manual
U-BUS
L2U
UIMB
PPM
Tou
Tou
Tou
CAN
CAN
CAN
E-BUS
USIU
IMB3
MIOS14
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