DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 693
![IC H8S/2437 MCU FLASH 128QFP](/photos/12/29/122945/df2437fv_sml.jpg)
DF2437FV
Manufacturer Part Number
DF2437FV
Description
IC H8S/2437 MCU FLASH 128QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Specifications of DF2437FV
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
I²C, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
85
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
128-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2437FV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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• Exiting Sleep Mode by STBY Pin
22.2.3
Transition to Software Standby Mode:
If a SLEEP instruction is executed when the SSBY bit in SBYCR is set to 1, software standby
mode is entered. In this mode, the CPU, on-chip peripheral functions, and oscillator all stop.
However, the contents of the CPU’s internal registers, on-chip RAM data, and the states of on-
chip peripheral functions other than the PWM, PWMX, SCI, IIC3, and A/D converter, and I/O
ports, are retained. Whether the address bus and bus control signals are placed in the high-
impedance state or retain the output state can be specified by the OPE bit in SBYCR.
In this mode the oscillator stops, and therefore power consumption is significantly reduced.
Clearing Software Standby Mode:
Software standby mode is cleared by an external interrupt (NMI pin, or pins IRQ0 to IRQ7), or by
means of the RES pin or STBY pin. Setting the SSI bit in SSIER to 1 enables IRQ0 to IRQ7 to be
used as software standby mode clearing sources.
• Clearing with Interrupt
• Clearing with RES Pin
• Clearing with STBY Pin
When the STBY pin level is driven low, a transition is made to hardware standby mode.
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 LSI, 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 IRQ7
is generated. Software standby mode cannot be cleared if the interrupt has been masked on the
CPU side.
When the RES pin is driven low, clock oscillation is started. At the same time as clock
oscillation starts, clocks are supplied to the entire LSI. Note that the RES pin must be held low
until clock oscillation stabilizes. When the RES pin goes high, the CPU starts reset exception
handling.
When the STBY pin is driven low, a transition is made to hardware standby mode.
Software Standby Mode
Rev.2.00 May. 28, 2009 Page 653 of 732
REJ09B0059-0200
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