SH7206 Datasheet, PDF (1092/1188 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 25 Electrical Characteristics
25.2 Power-On/Power-Off Sequence
Power-on/power-off sequence and their recommended values are shown below.
PVcc, AVcc (3.3 V power supply)
PVcc, AVcc Min. voltage (3.0 V)
Vcc, PLLVcc (1.25 V power supply)
Vcc, PLLVcc Min. voltage (1.15 V)
GND
tunc
Pin status
undefined
Normal operation period
tunc
Pin status
undefined
Figure 25.1 Power-On/Power-Off Sequence
Table 25.2 Recommended Time for Power-On/Power-Off Sequence
Item
Symbol
Maximum Allowance Value
Unit
Undefined time
tunc
100
ms
Note:
The table shown above is recommended values, so they represent guidelines rather than
strict requirements. Either 3.3 V- or 1.25 V- power supply can be turned on or off first,
though, an undefined period appears until the power that is turned on later rises to the Min.
voltage or after the power that is turned off earlier passes the Min. voltage to 0 V. During
these periods, pin or internal states become undefined. Design the system so that these
undefined states do not cause an overall malfunction.
Rev. 3.00 Jun. 18, 2008 Page 1068 of 1160
REJ09B0191-0300