SH7262 datasheet(4/45 Pages) RENESAS

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SH7262/SH7264 Group

High-speed Read/Write Serial Flash Memory

Using the Renesas Serial Peripheral Interface

REJ06B0889-0100/Rev.1.00

June 2009

Page 4 of 45

Serial flash memory

AT26DF161A

2 MB

SH7264

RSPCK0

SCK (Serial Clock)

SI (Serial Data Input)

SSL00

WP# (Write Protect)

DIP

switches

3.3 V

CS# (Chip Select)

SO (Serial Data Output)

HOLD#

3.3 V

MOSI0

MISO0

3.3 V

Figure 1 Serial Flash Memory Circuit

Note: Pull-up or pull-down the control signal pins by the external resistor

To pull up or pull down the control signal pins, determine the signal line level not to cause the external device

malfunction when the MCU pin status is in high-impedance. SSL00 pin is pulled up by the external resistor to High-

level. Pull up or down the RSPCK0 and MOSI0 pins. As the MISO0 pin is an input pin, pull up or down it to avoid

floating to the midpoint voltage.

Table 2 Multiplexed Pins

SH7264 Port Control Register

Peripheral

Functions

Name

MD bit Setting

SH7264

Multiplexed Pin Name

RSPI

MISO0

PFCR3

PF12MD[2:0] = B'011

PF12/BS#/MISO0/TIOC3D/SPDIF_OUT

MOSI0

PFCR2

PF11MD[2:0] = B'011

PF11/A25/SSIDATA3/MOSI0/TIOC3C/SPDIF_IN

SSL00

PFCR2

PF10MD[2:0] = B'011

PF10/A24/SSIWS3/SSL00/TIOC3B/FCE#

RSPCK0

PFCR2

PF9MD[2:0] = B'011

PF9/A23/SSISCK3/RSPCK0/TIOC3A/FRB

Note: SH7264 Multiplexed Pins

MISO0, MOSI0, SSL00, and RSPCK0 pins are multiplexed, and set to general-purpose I/O ports as

default. Before accessing serial flash memory, use the general-purpose I/O port control register to set the

multiplexed pins to RSPI pins.

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