User`s manual

4: INTERFACING TO THE MOTOROLA MPC821 MICROPROCESSOR
APPLICATION NOTES (S19A-G-005-05) EPSON 5-29
4.4 MPC821/S1D13504 Interface
4.4.1 Hardware Connections
Due to the flexibility of the MPC821 and S1D13504 bus interfaces no glue logic is required. A sin-
gle resistor is used to speed up the rise time of the WAIT# (T
A) signal when terminating the bus
cycle. Figure 4-3 shows a block diagram of the interface.
Figure 4-3 Block Diagram of MPC821/S1D13504 Interface
Table 4-1 details the connections between the pins and signals of the MPC821 and the S1D13504.
A10
A[31:11]
D[15:0]
CS4
TA
WE0
WE1
OE
SYSCLK
RESET
M/R#
AB[20:0]
SD[15:0]
CS#
WAIT#
WE1#
WE0#
RD1#
RD0#
BUSCLK
RESET#
MPC821 S1D13504
Vcc
470 pull-up