M38511EA-SP View Datasheet(PDF) - Renesas Electronics

Part Name

Description

MFG CO.

M38511EA-SP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Renesas Electronics 

3851 Group (Built-in 24 KB or more ROM)

qClear Status Register Command

This command clears the bits (SR4, SR5) which are set when the

status register operation ends in error. When the “5016” command

code is sent with the 1st byte, the aforementioned bits are

cleared. When the clear status register operation ends, the SRDY1

(BUSY) signal changes from “H” to “L” level.

SCLK1

RxD

TxD

SRDY1(BUSY)

5016

Fig. 68 Timing for clear status register

qPage Program Command

This command writes the specified page (256 bytes) in the flash

memory sequentially one byte at a time. Execute the page pro-

gram command as explained here following.

(1) Transfer the “4116” command code with the 1st byte.

(2) Transfer addresses A8 to A15 and A16 to A23 (“0016”) with the

2nd and 3rd bytes respectively.

(3) From the 4th byte onward, as write data (D0 to D7) for the

page (256 bytes) specified with addresses A8 to A23 is input

sequentially from the smallest address first, that page is auto-

matically written.

When reception setup for the next 256 bytes ends, the SRDY1

(BUSY) signal changes from “H” to “L” level. The result of the

page program can be known by reading the status register. For

more information, see the section on the status register.

SCLK1

RxD

TxD

SRDY1(BUSY)

Fig. 69 Timing for page program

4116

A8 to

A15

A16 to

A23

data0

Rev.1.01 Oct 15, 2003 page 66 of 89

data255

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