HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 1044
HD6412373R
Manufacturer Part Number
HD6412373R
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 24 Power-Down Modes
24.2.4
Transition to Hardware Standby Mode: When the STBY pin is driven low, a transition is made
to hardware standby mode from any mode.
In hardware standby mode, all functions enter the reset state and stop operation, resulting in a
significant reduction in power dissipation. As long as the prescribed voltage is supplied, on-chip
RAM data is retained. I/O ports are set to the high-impedance state.
In order to retain on-chip RAM data, the RAME bit in SYSCR should be cleared to 0 before
driving the STBY pin low. Do not change the state of the mode pins (MD2 to MD0) while this
LSI is in hardware standby mode.
Rev.7.00 Mar. 18, 2009 page 976 of 1136
REJ09B0109-0700
Oscillator
φ
NMI
NMIEG
SSBY
Hardware Standby Mode
Figure 24.2 Software Standby Mode Application Example
NMI exception
handling
NMIEG=1
SSBY=1
SLEEP instruction
Software standby mode
(power-down mode)
stabilization
Oscillation
time t
OSC2
NMI exception
handling
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