mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 345

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

The reservation protocol for a single-level (local) bus is illustrated in Figure 13-26. It
assumes that external logic on the bus performs the following functions:
• Snoops accesses to all local bus slaves
• Holds one reservation for each local master capable of storage reservations
• Sets the reservation when that master issues a load and reserve request
• Clears the reservation when some other master issues a store to the reservation
address
lwarx
EXTERNAL BUS
MPC823
CLKOUT
INTERFACE
S
R
Q
Freescale Semiconductor, Inc.
Figure 13-26. Reservation On Local Bus
For More Information On This Product,
AT[0:3], RSV,R/W,TS
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
RESERVATION
E-BUS
LOGIC
A[6:31]
External Bus Interface
MASTER
BUS
13-39