661
Section 23 Electrical Characteristics
23.1
Absolute Maximum Ratings
Table 23.1 shows the absolute maximum ratings.
Table 23.1
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Power supply voltage (I/O)
VccQ
–0.3 to 4.2
V
Power supply voltage (internal) Vcc
Vcc – PLL1
Vcc – PLL2
Vcc – RTC
–0.3 to 2.5
V
Input voltage (except port L)
Vin
–0.3 to VccQ + 0.3
V
Input voltage (port L)
Vin
–0.3 to AVcc + 0.3
V
Analog power-supply voltage
AVcc
–0.3 to 4.6
V
Analog input voltage
V
AN
–0.3 to AVcc + 0.3
V
Operating temperature
Topr
–20 to 75
°C
Storage temperature
Tstr
–55 to 125
°C
Caution: Operating the chip in excess of the absolute maximum rating may result in permanent
damage.
•
Order of turning on 1.7 V/1.8 V/1.9 V/2.0 V power (Vcc, Vcc-PLL1, Vcc-PLL2, Vcc-RTC)
and 3.3 V power (VccQ, AVcc):
1. First turn on the 3.3 V power, then turn on the 1.7 V/1.8 V/1.9 V/2.0 V power within 100
µ
s. This interval should be as short as possible.
2. Until voltage is applied to all power supplies and a low level is input at the
RESETP
pin,
internal circuits remain unsettled, and so pin states are also undefined. The system design
must ensure that these undefined states do not cause erroneous system operation.
Waveforms at power-on are shown in the following figure.
Содержание SH7709S
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Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
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