HD64F2357VF13 Datasheet, PDF (1042/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

E.2 When Pins Settle from the High-Impedance State at Power-On
When the STBY pin level changes from low to high after powering on, the chip goes to the power-on reset state* after a
high level is detected at the STBY pin. While the chip detects a low level at the STBY pin, it is in the hardware standby
mode. During this interval, the pins are in the high-impedance state.
After detecting a high level at the STBY pin, the chip starts oscillation.
Note: * Excerpt for the H8S/2357 ZTAT, all resets are power-on resets, regardless of the level on the NMI pin.
V_CC
STBY
NMI
RES
t_OSC1
Hardware
standby mode
Power-on reset*¹
T1
Confirm t₁min and t_NMIS.*²
φ
NMI = High
RES = Low
Notes: 1. Applies to the ZTAT version only.
2. Except for the H8S/2357 ZTAT, all resets are
power-on resets, regardless of the level on the NMI pin.
Figure E-2 When Pins Settle from the High-Impedance State at Power-On
Rev.6.00 Oct.28.2004 page 1012 of 1016
REJ09B0138-0600H