mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 425

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

The A[28:20] pins must be used to generate addresses to memory devices during burst
accesses. They duplicate the value of the A[28:20] signals when an internal master initiates
a transaction on the external bus. When an external master initiates a transaction on the
external bus, the A[28:20] pins reflect the value of the A[28:20] pins on the first clock cycle
of the memory access. On subsequent clock cycles, the behavior of the A[28:20] pins
depends on the configuration of the UPM.
CLKOUT
A[6:27]
A[28:31]
TS
TA
CSx
WEx
OE
DATA
RD/
BURST
TSIZEx
WR
Figure 15-35. Synchronous External Master Access
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
COMPARE
ADDRESS
MATCH
AND
MEMORY
ACCESS
DEVICE
Memory Controller
15-69