H8SX1657 Datasheet, PDF (692/892 Pages) Renesas Technology Corp – Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

Section 18 Flash Memory (0.18-µm F-ZTAT Version)
18.7.2 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 ER0 and ER1 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
18.4 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 18.4 Parameters and Target Modes
Initial
Parameter Download Initialization Programming Erasure R/W 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.
Rev. 2.00 Jun. 28, 2007 Page 668 of 864
REJ09B0341-0200