DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 673
DF2211NP24V
Manufacturer Part Number
DF2211NP24V
Description
H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
Manufacturer
Renesas Technology / Hitachi Semiconductor
Datasheet
1.DF2211NP24V.pdf
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20.4
20.4.1
A transition is made to software standby mode when the SLEEP instruction is executed when the
SSBY bit in SBYCR is set to 1 and the LSON bit in LPWRCR and the PSS bit in TCSR_1 are
cleared to 0. In this mode, the CPU, on-chip supporting modules, and oscillator all stop. However,
the contents of the CPU's internal registers, RAM data, and the states of on-chip supporting
modules other than the A/D converter, and the states of I/O ports, are retained. In this mode the
oscillator stops, and therefore power dissipation is significantly reduced.
20.4.2
Software standby mode is cleared by an external interrupt (NMI pin, IRQ7 pin, or IRQ0 to IRQ4
pins), RTC interrupt (IRQ5 signal), or USB suspend/resume interrupt (IRQ6 signal), or by means
of the RES pin, MRES pin*, or STBY pin.
• Clearing with an interrupt
• Clearing with the RES or MRES* pin
• Clearing with the STBY pin
Note: * Supported only by the H8S/2218 Group.
When an NMI or IRQ0 to IRQ7 interrupt request signal is input, clock oscillation starts, and
after the elapse of the time set in bits STS2 to STS0 in SBYCR, stable clocks are supplied to
the entire chip, software standby mode is cleared, and interrupt exception handling is started.
When clearing software standby mode with an IRQ0 to IRQ7 interrupt, set the corresponding
enable bit to 1 and ensure that no interrupt with a higher priority than interrupts IRQ0 to IRQ5
is generated. Software standby mode cannot be cleared if the interrupt has been masked on the
CPU side.
When the RES or MRES* pin is driven low, clock oscillation is started. At the same time as
clock oscillation starts, clocks are supplied to the entire chip. Note that the RES or MRES* pin
must be held low until clock oscillation stabilizes. When the RES or MRES* pin goes high, the
CPU begins reset exception handling.
When the STBY pin is driven low, a transition is made to hardware standby mode.
Software Standby Mode
Transition to Software Standby Mode
Clearing Software Standby Mode
Rev.7.00 Dec. 24, 2008 Page 619 of 698
REJ09B0074-0700
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