HD6432138SW datasheet(651/1061 Pages) RENESAS

651 / 1061 page

Section 21 ROM (Mask ROM Version, H8S/2138 F-ZTAT, H8S/2134 F-ZTAT, and H8S/2132 F-ZTAT)

Rev. 4.00 Jun 06, 2006 page 597 of 1004

REJ09B0301-0400

On-Chip RAM Area Divisions in Boot Mode: In boot mode, the 128-byte area from H'(FF)FF00

to H'(FF)FF7F is reserved for use by the boot program, as shown in figure 21.10. The area to

which the programming control program is transferred is H'(FF)E080 to H'(FF)EFFF (3968 bytes)

in the 128-kbyte versions including H8S/2132, except for H8S/2132R or H'(FF)E880 to

H'(FF)EFFF (1920 bytes) in the 64-kbyte versions including H8S/2132R, except for H8S/2132.

The boot program area can be used when the programming control program transferred into RAM

enters the execution state. A stack area should be set up as required.

H'(FF)E080

H'(FF)EFFF

Programming

control*1 program

area

(3,968 bytes)

H'(FF)FF00

H'(FF)FF7F

Boot program

area*2

(128 bytes)

(a) 128-kbyte versions

(including H8S/2132)

H'(FF)E880

H'(FF)EFFF

Programming

control program

area

(1,920 bytes)

H'(FF)FF00

H'(FF)FF7F

Boot program

area*1

(128 bytes)

(b) 64-kbyte versions

(except for H8S/2132)

Notes: 1. In H8S/2132 F-ZTAT (Mask ROM version), H'(FF)E080 to H'(FF)E87F is a reserved

area that is used only for boot mode operation. Do not use this area for other purpose.

2. The boot program area cannot be used until a transition is made to the execution state

for the programming control program transferred to RAM. Note that the boot program

remains stored in this area after a branch is made to the programming control program.

Figure 21.10 RAM Areas in Boot Mode

Notes on Use of User Mode:

• When the chip comes out of reset in boot mode, it measures the low period of the input at the

SCI’s RxD1 pin. The reset should end with RxD1 high. After the reset ends, it takes about 100

states for the chip to get ready to measure the low period of the RxD1 input.

• In boot mode, if any data has been programmed into the flash memory (if all data is not 1), all

flash memory blocks are erased. Boot mode is for use when user program mode is unavailable,

such as the first time on-board programming is performed, or if the program activated in user

program mode is accidentally erased.

HD6432138SW Datasheet(PDF) 651 Page - Renesas Technology Corp

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