mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 412

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

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.
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Figure 15-29. BSx Signal Selection
MPC823 REFERENCE MANUAL
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BANK SELECTED
MS IN BRx
MUX
PS IN BRx
SELECT
TSIZx
LOGIC
BYTE-
A[30:31]
BS0
BS1
BS2
BS3
MOTOROLA