SH7055S Datasheet, PDF (793/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Table 22.6 Usable Parameters and Target Modes
Name of Parameter Abbrevi- Down Initiali- Program- Erasure R/W Initial
ation
load zation ming
Value
Download pass/fail DPFR
O
—
—
—
R/W Undefined
result
Flash pass/fail result FPFR
—
O
O
O
R/W Undefined
Flash programming/ FPEFEQ —
O
—
—
R/W Undefined
erasing frequency
control
Flash user branch FUBRA —
O
—
—
R/W Undefined
address set
parameter
Flash multipurpose FMPAR —
—
O
address area
—
R/W Undefined
Flash multipurpose FMPDR —
—
O
data destination area
—
R/W Undefined
Flash erase block
FEBS
—
—
—
O
select
R/W Undefined
Note: * One byte of start address of download destination specified by FTDAR
Allocation
On-chip
RAM*
R0 of CPU
R4 of CPU
R5 of CPU
R5 of CPU
R4 of CPU
R4 of CPU
(1) Download Control
The on-chip program is automatically downloaded by setting the SCO bit to 1. The on-chip
RAM area to be downloaded is the area as much as 2 kbytes starting from the start address
specified by FTDAR. For the address map of the on-chip RAM, see figure 22.10.
The download control is set by using the programming/erasing interface registers. The return
value is given by the DPFR parameter.
(a) Download pass/fail result parameter (DPFR: one byte of start address of on-chip RAM
specified by FTDAR)
This parameter indicates the return value of the download result. The value of this
parameter can be used to determine if downloading is executed or not. Since the
confirmation whether the SCO bit is set to 1 is difficult, the certain determination must be
performed by setting one byte of the start address of the on-chip RAM area specified by
FTDAR to a value other than the return value of download (for example, H'FF) before the
download start (before setting the SCO bit to 1). For the checking method of download
results, see section 22.5.2, User Program Mode.
Bit :
7
6
5
4
3
2
1
0
0
0
0
0
0
SS
FK
SF
Bits 7 to 3—Unused: Return 0.
Rev.2.0, 07/03, page 755 of 960