D12320VF25IV Datasheet, PDF (874/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 19 ROM
19.20.9 PROM Mode Transition Time
Commands cannot be accepted during the oscillation stabilization period or the PROM mode setup
period. After the PROM mode setup time, a transition is made to memory read mode.
Table 19.45 Command Wait State Transition Time Specifications
Item
Symbol
Min
Standby release (oscillation
tosc1
30
stabilization time)
PROM mode setup time
tbmv
10
VCC hold time
tdwn
0
Max
Unit
—
ms
—
ms
—
ms
VCC
RES
FWE
tosc1
tbmv
Memory read
mode
Command
wait state
Auto-program mode
Auto-erase mode
Command
wait state
Normal/
abnormal end
identification
tdwn
Note: Except in auto-program mode and auto-erase mode, drive the FWE input pin low.
Figure 19.55 Oscillation Stabilization Time, PROM Mode Setup Time, and Power Supply
Fall Sequence
Rev.6.00 Sep. 27, 2007 Page 842 of 1268
REJ09B0220-0600