H8SXSLASH1663M datasheet(1206/1504 Pages) RENESAS

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Section 25 Flash Memory

Rev. 2.00 Sep. 24, 2008 Page 1174 of 1468

REJ09B0412-0200

25.12

Programmer Mode

Along with its on-board programming mode, this LSI also has a programmer mode as a further

mode for the writing and erasing of programs and data. In programmer mode, a general-purpose

PROM programmer that supports the device types shown in table 25.15 can be used to write

programs to the on-chip ROM without any limitation.

Table 25.15 Device Types Supported in Programmer Mode

Target Memory MAT

Product Classification ROM Size

Device Type

H8SX/1663

384 Kbytes

FZTAT512V3A

H8SX/1664

512 Kbytes

FZTAT1024V3A

User MAT

H8SX/1668

1 Mbyte

FZTAT1024V3A

H8SX/1663

H8SX/1664

User boot MAT

H8SX/1668

16 Kbytes

FZTATUSBT16V3A

25.13

Standard Serial Communications Interface Specifications for Boot

Mode

The boot program initiated in boot mode performs serial communications using the host and on-

chip SCI_4. The serial communications interface specifications are shown below.

The boot program has three states.

1. Bit-rate-adjustment state

In this state, the boot program adjusts the bit rate to achieve serial communications with the

host. Initiating boot mode enables starting of the boot program and entry to the bit-rate-

adjustment state. The program receives the command from the host to adjust the bit rate. After

adjusting the bit rate, the program enters the inquiry/selection state.

2. Inquiry/selection state

In this state, the boot program responds to inquiry commands from the host. The device name,

clock mode, and bit rate are selected. After selection of these settings, the program is made to

enter the programming/erasing state by the command for a transition to the

programming/erasing state. The program transfers the libraries required for erasure to the on-

chip RAM and erases the user MATs and user boot MATs before the transition.

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