mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 387

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

Figure 15-7 illustrates the basic connection between the MPC823 and an external
peripheral device. In this case, CSx is connected directly to the CE signal of the memory
device and the R/W signal is connected to the respective R/W signal in the peripheral
device. The CSx signal is the strobe output for the memory access.
Figure 15-8 illustrates the CSx signal as defined by the setup time required between the
address lines and the CE signal. The MPC823 memory controller allows you to specify the
CSx signal to meet this requirement using the ACS field of the option register.
Figure 15-8. GPCM Peripheral Device Basic Timing (ACS = 10 or 11 and TRLX = 0)
CLOCK
ADDRESS
TS
TA
CSx
R/W
DATA
MEMORY
Figure 15-7. GPCM Peripheral Device Interface
Freescale Semiconductor, Inc.
ADDRESS
For More Information On This Product,
DATA
R/W
CSx
MPC823 REFERENCE MANUAL
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PERIPHERAL
ADDRESS
CE
R/W
DATA
ACS = 10
ACS = 11
Memory Controller
15-31