mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 321

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

A typical single beat transfer assumes that the external memory has a 32-bit port size. The
MPC823 provides an effective mechanism for interfacing with 16-bit port size memories and
8-bit port size memories, thus allowing transfers to these devices when they are controlled
by the internal memory controller. The port size (PS) timing shown in the following figures is
representative of the PS field, which is described in Section 15.3.1.1 Base Registers .
CLKOUT
BR
BG
BB
A[6:31]
RD/WR
TSIZ[0:1]
BURST
TS
STS
DATA
TA
PS
Figure 13-9. Single Beat, 32-Bit Data, Write Cycle From a 16-Bit Port Size
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External Bus Interface
13-15