SH7262 datasheet(13/45 Pages) RENESAS

13 / 45 page

SH7262/SH7264 Group

High-speed Read/Write Serial Flash Memory

Using the Renesas Serial Peripheral Interface

REJ06B0889-0100/Rev.1.00

June 2009

Page 13 of 45

End

Set the Command register_00 (SPCMD_00)

• Set the SPCMD_00 (SPCMD_00 = H'E780)

Functions:

(1) Specify the same value in SPCKD_0, SSLND_0, and SPND_0

(2) Specify the data format to MSB first

(3) Specify the transfer data length to 8-bit

(4) Keep the SSL signal level from the end of the transfer

until the beginning of the next access

(5) Select the SPBR_0 base bit rate (no division)

(6) Specify the RSPCK when idling as 0

(7) Specify the RSPCK to latch data on odd edge, and output

data on even edge

Set the Buffer control register_0 (SPBFCR_0)

• Set the SPBFCR_0 (SPBFCR_0 = H'C0, SPBFCR_0 = H'00)

Functions:

(1) Reset the data in transmit/receive buffers

(It should be cleared to 0 every time the data is written)

(2) Specify the number of available triggering bytes when the

transmit buffer is empty as 1

(3) Specify the number of triggering bytes when the receive buffer

is full as 1

Set the Slave select polarity register_0 (SSLP_0)

• Set the SSLP_0 (SSLP_0 = H'00)

Function: Specify the SSL signal to 0-active

Set the Control register_0 (SPCR_0)

• Set the SPCR_0 (SPCR_0 = H'48)

Functions:

(1) Enable the RSPI

(2) Disable the transmit, receive, error interrupts

(3) Set the RSPI in master mode

(4) Disable to detect the mode fault error

Figure 10 RSPI Initialization Flow Chart (2/2)

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