Motorola PowerQUICC II MPC8280 Series Reference Manual page 535

11.7.0.1 EDO Interface Example
Figure 11-76 shows a memory connection to extended data-out type devices. For this
connection, GPL1 is connected to the memory device's OE pins.
MPC8280
BS[0–7]
CS1
R/W
A[19–28]
D[0–63]
GPL1
Figure 11-76. MPC8280/EDO Interface Connection to the 60x Bus
Table 11-44 shows the programming of the register field for supporting the configuration
shown in Figure 11-76. The example assumes a CLKIN frequency of 66 MHz and that the
device needs a 1,024-cycle refresh every 10 µs.
Table 11-44. EDO Connection Field Value Example
Machine select UPMA
Port size 64-bit
No write protect (R/W)
Refresh timer prescaler
Refresh timer value (1024 refresh cycles)
Refresh timer enable
Address multiplex size
MOTOROLA
Freescale Semiconductor, Inc.
RAS
CASl/h
OE
MCM516165
W
A[0–9]
D[0–15]
RAS
D[0–15]
CASl/h
OE
MCM516165
W
A[0–9]
Explanation
Chapter 11. Memory Controller
For More Information On This Product,
Go to: www.freescale.com
Memory System Interface Example Using UPM
RAS
CASl/h
1M x 16
OE
W
A[0–9]
16
16
RAS
CASl/h
1M x 16
OE
W
A[0–9]
Field
BRx[MS]
BRx[PS]
BRx[WP]
MPTPR
PURT[PURT]
MxMR[RFEN]
MxMR[AMx] 0b001
1M x 16
MCM516165
D[0–15]
16
16
D[0–15]
1M x 16
MCM516165
Value
0b100
0b00
0b0
0x04
0x07
0b1
11-97