Memory Controller
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
10-3
a 16-bit boot EPROM and CS1 is used for a 32-bit SRAM. The WE/BE[0:3] signals are used both to
program the EPROM and to enable write access to various bytes in the RAM.
Figure 10-3. MPC561/MPC563 Simple System Configuration
10.2
Memory Controller Architecture
The memory controller consists of a basic machine that handles the memory access cycle: the
general-purpose chip-select machine (GPCM).
When any of the internal masters request a new access to external memory, the address of the transfer (with
17 bits having a mask) and the address type (with three bits having a mask) are compared to each one of
the valid banks defined in the memory controller. Refer to
EPROM
Address
DATA[0:15]
SRAM
Address
CE
WE/BE[0:3]
Data
CS1
OE
Address
Data
CS0
WE/BE[0:3]
CE
OE
OE
[0:15]
[0:31]
WE/BE[0:1]
MPC500
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...