SH7065 Datasheet, PDF (806/941 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Section 19 256 kB Flash Memory (F-ZTAT)
Table 19.22 Stipulated Transition Times to Command Wait State
Item
Symbol Min
Standby release (oscillation settling tosc1
30
time)
Programmer mode setup time
VCC hold time
tbmv
10
tdwn
0
Max
Unit
Notes
—
ms
—
ms
—
ms
Command
Memory read
Auto-program wait state
mode
mode
Normal/abnormal
Command wait Auto-erase
termination
tosc1
tbmv state
mode
judgment
tdwn
Vcc
RES
FWE
Note: Except in auto-program mode and auto-erase mode, the FWE input pin should be driven low.
Figure 19.27 Oscillation Settling Time and Boot Program Transfer Time
19.11.9 Cautions Concerning Memory Programming
1. When programming addresses which have previously been programmed, carry out auto-
erasing before auto-programming.
2. When performing programming using programmer mode on a chip that has been
programmed/erased in an on-board programming mode, auto-erasing is recommended before
carrying out auto-programming.
Notes: 1. The flash memory is initially in the erased state when the device is shipped by Renesas.
For other chips for which the erasure history is unknown, it is recommended that auto-
erasing be executed to check and supplement the initialization (erase) level.
2. Auto-programming should be performed once only on the same address block.
Additional programming cannot be performed on previously programmed address
blocks.
Rev. 5.00 Sep 11, 2006 page 784 of 916
REJ09B0332-0500