mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 412

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mpc823rg

Manufacturer Part Number
mpc823rg
Description
Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
Manufacturer
Freescale Semiconductor, Inc
Datasheet
Memory Controller
15.5.4.2.3 Byte-Select Signals. The MS field in the base register of the accessed memory
bank selects a user-programmable machine on the currently requested cycle. The selected
UPM only affects the assertion and negation of the appropriate BSx signal and its timing as
specified in the RAM word. The BSx signals are also controlled by the port size of the
accessed bank, the transfer size of the transaction, and the address accessed.
Figure 15-29 illustrates how the BSx signals are controlled by the user-programmable
machines.
UPMA
UPMB
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 15-29. BSx Signal Selection
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
BANK SELECTED
MS IN BRx
MUX
PS IN BRx
SELECT
TSIZx
LOGIC
BYTE-
A[30:31]
BS0
BS1
BS2
BS3
MOTOROLA

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