HD64F36024FX Datasheet, PDF (309/386 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 18 Electrical Characteristics
18.3.7 Power-On Reset Circuit Characteristics (Optional)
Table 18.16 Power-On Reset Circuit Characteristics
V_SS = 0.0 V, T_a = –20 to +75°C, unless otherwise indicated.
Item
Symbol
Test
Condition Min
Values
Typ Max Unit
Pull-up resistance of RES pin
R
RES
100 150 —
kΩ
Power-on reset start voltage*
V
por
—
—
100 mV
Note: * The power-supply voltage (Vcc) must fall below Vpor = 100 mV and then rise after
charge of the RES pin is removed completely. In order to remove charge of the RES
pin, it is recommended that the diode be placed in the Vcc side. If the power-supply
voltage (Vcc) rises from the point over 100 mV, a power-on reset may not occur.
18.4 Operation Timing
t_OSC
OSC1
V_IH
V_IL
t_CPr
t_CPH
t_CPL
t_CPf
Figure 18.1 System Clock Input Timing
Rev. 4.00 Sep. 23, 2005 Page 281 of 354
REJ09B0025-0400