Motorola MPC8260 - Manual (Page 368)

10-92 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
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.
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
Explanation Field Value
Machine select UPMA BRx[MS] 0b100
Port size 64-bit BRx[PS] 0b00
No write protect (R/W) BRx[WP] 0b0
Refresh timer prescaler MPTPR 0x04
Refresh timer value (1024 refresh cycles) PURT[PURT] 0x07
Refresh timer enable MxMR[RFEN] 0b1
Address multiplex size MxMR[AMx] 0b001
Disable timer period MxMR[DSx] 0b10
Burst inhibit device ORx[BI] 0b 0
RAS
CASl/h
W
MCM516165
1M x 16
16
A[0Ð9]
D[0Ð15]
16
MPC8260
BS[0Ð7]
CS1
R/W
A[19Ð28]
D[0Ð63]
16
16
OE
RAS
CASl/h
W
MCM516165
1M x 16
A[0Ð9]
D[0Ð15]
OE
RAS
CASl/h
W
MCM516165
1M x 16
A[0Ð9]
D[0Ð15]
OE
RAS
CASl/h
W
MCM516165
1M x 16
A[0Ð9]
D[0Ð15]
OE GPL1