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MPC8280 Datasheet(PDF) 513 Page - Freescale Semiconductor, Inc

Part # MPC8280
Description  PowerQUICC??II Family Reference Manual
PDF  1386 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC8280 Datasheet(HTML) 513 Page - Freescale Semiconductor, Inc

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Memory Controller
MPC8280 PowerQUICC II Family Reference Manual, Rev. 1
Freescale Semiconductor
11-93
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.
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
Explanation
Field
Value
Machine select UPMA
BR
x[MS]
0b100
Port size 64-bit
BR
x[PS]
0b00
No write protect (R/W)
BR
x[WP]
0b0
Refresh timer prescaler
MPTPR
0x04
Refresh timer value (1024 refresh cycles)
PURT[PURT]
0x07
Refresh timer enable
M
xMR[RFEN]
0b1
Address multiplex size
M
xMR[AMx]
0b001
Disable timer period
M
xMR[DSx]0b10
Burst inhibit device
OR
x[BI]
0b
0
RAS
CASl/h
W
MCM516165
1M x 16
16
A[0–9]
D[0–15]
16
MPC8280
BS[0–7]
CS1
R/W
A[19–28]
D[0–63]
16
16
OE
RAS
CASl/h
W
MCM516165
1M x 16
A[0–9]
D[0–15]
OE
RAS
CASl/h
W
MCM516165
1M x 16
A[0–9]
D[0–15]
OE
RAS
CASl/h
W
MCM516165
1M x 16
A[0–9]
D[0–15]
OE
GPL1



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