SH7052 datasheet(731/919 Pages) RENESAS

731 / 919 page

705

Note: If a memory cell does not operate normally and cannot be erased, one H'FF byte is

transmitted as an erase error, and the erase operation and subsequent operations

are halted.

Start

Set pins to boot mode

and execute reset-start

Host transfers data (H'00)

continuously at prescribed bit rate

SH7052F and SH7053F measure

low period of H'00 data transmitted

by host

SH7052F and SH7053F calculate

bit rate and sets value in bit rate

After bit rate adjustment, SH7052F

and SH7053F transmit one H'00

data byte to host to indicate

end of adjustment

Host confirms normal reception

of bit rate adjustment end

indication (H'00), and transmits

one H'55 data byte

After receiving H'55,

SH7052F and SH7053F transmit

one H'AA data byte to host

Host transmits number

of programming control program

bytes (N), upper byte followed

by lower byte

SH7052F and SH7053F transmit

received number of bytes to host

as verify data (echo-back)

n = 1

Host transmits programming control

program sequentially in byte units

SH7052F and SH7053F transmit

received programming control

program to host as verify data

(echo-back)

Transfer received programming

control program to on-chip RAM

n = N?

Yes

End of transmission

Check flash memory data, and

if data has already been written,

erase all blocks

After confirming that all flash

memory data has been erased,

SH7052F and SH7053F transmit

one H'AA data byte to host

Execute programming control

program transferred to on-chip RAM

n + 1

→ n

Figure 20.9 Boot Mode Execution Procedure

SH7052 Datasheet(PDF) 731 Page - Renesas Technology Corp

SH7052 Datasheet(HTML) 731 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL