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H8SX/1663 数据表(PDF) 943 Page - Renesas Technology Corp |
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H8SX/1663 数据表(HTML) 943 Page - Renesas Technology Corp |
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943 / 1158 page  Section 21 Flash Memory (0.18- µm F-ZTAT Version) Rev.1.00 Jun. 07, 2006 Page 891 of 1102 REJ09B0294-0100 21.6.2 Programming/Erasing Interface Parameters The programming/erasing interface parameters specify the operating frequency, storage place for program data, start address of programming destination, and erase block number, and exchanges the execution result. These parameters use the general registers of the CPU (ER0 and ER1) or the on-chip RAM area. The initial values of programming/erasing interface parameters are undefined at a power-on reset or a transition to software standby mode. Since registers of the CPU except for R0 are saved in the stack area during download of an on- chip program, initialization, programming, or erasing, allocate the stack area before performing these operations (the maximum stack size is 128 bytes). The return value of the processing result is written in R0. The programming/erasing interface parameters are used in download control, initialization before programming or erasing, programming, and erasing. Table 21.4 shows the usable parameters and target modes. The meaning of the bits in the flash pass and fail result parameter (FPFR) varies in initialization, programming, and erasure. Table 21.4 Parameters and Target Modes Parameter Download Initialization Programming Erasure R/W Initial Value Allocation DPFR O R/W Undefined On-chip RAM* FPFR O O O O R/W Undefined R0L of CPU FPEFEQ O R/W Undefined ER0 of CPU FMPAR O R/W Undefined ER1 of CPU FMPDR O R/W Undefined ER0 of CPU FEBS O R/W Undefined ER0 of CPU Note: * A single byte of the start address of the on-chip RAM specified by FTDAR Download Control: The on-chip program is automatically downloaded by setting the SCO bit in FCCS to 1. The on-chip RAM area to download the on-chip program is the 4-kbyte area starting from the start address specified by FTDAR. Download is set by the programming/erasing interface registers, and the download pass and fail result parameter (DPFR) indicates the return value. |
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