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Epson Research and Development Page 13
Vancouver Design Center
Interfacing to the Motorola MPC821 Microprocessor S1D13705
Issue Date: 01/02/13 X27A-G-010-02
3 S1D13705 Host Bus Interface
This section is a summary of the host bus interface mode used on the S1D13705 to interface
to the MPC821.
The S1D13705 implements a 16-bit interface to the host microprocessor which may operate
in one of several modes compatible with most of the popular embedded microprocessor
families. The interface mode used for the MPC821 is:
• Generic #1 (Chip Select, plus individual Read Enable/Write Enable for each byte).
3.1 Host Bus Interface Modes
For details on configuration, refer to the S1D13705 Hardware Functional Specification,
document number X27A-A-001-xx.
Table 3-1: Host Bus Interface Pin Mapping
S1D13705
Pin Names
Generic #1
AB[15:1] A[15:1]
AB0 A0
DB[15:0] D[15:0]
WE1# WE1#
CS# External Decode
BCLK BCLK
BS# connect to V
SS
RD/WR# RD1#
RD# RD0#
WE0# WE0#
WAIT# WAIT#
RESET# RESET#