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H8SX/1663 数据表(PDF) 982 Page - Renesas Technology Corp |
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H8SX/1663 数据表(HTML) 982 Page - Renesas Technology Corp |
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982 / 1158 page ![]() Section 21 Flash Memory (0.18- µm F-ZTAT Version) Rev.1.00 Jun. 07, 2006 Page 930 of 1102 REJ09B0294-0100 21.10 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 21.13 can be used to write programs to the on-chip ROM without any limitation. Table 21.13 Device Types Supported in Programmer Mode Target Memory MAT Product Classification ROM Size Device Type H8SX/1663 384 kbytes User MAT H8SX/1664 512 kbytes FZTAT512V3A 21.11 Standard Serial Communication Interface Specifications for Boot Mode The boot program initiated in boot mode performs serial communication using the host and on- chip SCI_4. The serial communication 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 communication 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 before the transition. 3. Programming/erasing state Programming and erasure by the boot program take place in this state. The boot program is made to transfer the programming/erasing programs to the on-chip RAM by commands from the host. Sum checks and blank checks are executed by sending these commands from the host. |
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