Edo Interface Example - Motorola MPC8260 PowerQUICC II User Manual

Part III. The Hardware Interface

10.7.0.1 EDO Interface Example

Figure 10-76 shows a memory connection to extended data-out type devices. For this
connection, GPL1 is connected to the memory deviceÕs OE pins.
MPC8260
BS[0Ð7]
CS1
R/W
A[19Ð28]
D[0Ð63]
GPL1
Figure 10-76. MPC8260/EDO Interface Connection to the 60x Bus
Table 10-43 shows the programming of the register Þeld for supporting the conÞguration
shown in Figure 10-76. The example assumes a CLKIN frequency of 66 MHz and that the
device needs a 1,024-cycle refresh every 10 µs.
Table 10-43. 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
Disable timer period
Burst inhibit device
10-92
RAS
CASl/h
1M x 16
OE
MCM516165
W
A[0Ð9]
D[0Ð15]
RAS
D[0Ð15]
CASl/h
OE 1M x 16
MCM516165
W
A[0Ð9]
Explanation
MPC8260 PowerQUICC II UserÕs Manual
RAS
CASl/h
OE
MCM516165
W
A[0Ð9]
16
16
RAS
CASl/h
OE
MCM516165
W
A[0Ð9]
Field Value
BRx[MS] 0b100
BRx[PS] 0b00
BRx[WP] 0b0
MPTPR 0x04
PURT[PURT] 0x07
MxMR[RFEN] 0b1
MxMR[AMx] 0b001
MxMR[DSx] 0b10
ORx[BI] 0b0
1M x 16
D[0Ð15]
16
16
D[0Ð15]
1M x 16
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