R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 130
R4F24278NVFQU
Manufacturer Part Number
R4F24278NVFQU
Description
MCU 512K/48K 2.7-5.5V 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Datasheet
1.R4F24278NVFQU.pdf
(1482 pages)
Specifications of R4F24278NVFQU
Core Processor
H8S/2600
Core Size
16/32-Bit
Speed
33MHz
Connectivity
EBI/EMI, I²C, IrDA, SCI, Smart Card, SPI, SSU, UART/USART
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
98
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Eeprom Size
-
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 16x10b; D/A 2x8b
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
144-LQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
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REALTEK
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Section 4 Resets
4.3.1
TCSR selects the clock source to be input to TCNT of the watchdog timer, and the timer mode.
For details on the watchdog timer reset, see section 15, Watchdog Timer (WDT).
4.3.2
RSTCSR controls the generation of the internal reset signal when TCNT overflows, and selects
the type of internal reset signal. RSTCSR is initialized to H'1F by a reset signal from the RES pin,
but not by the WDT internal reset signal caused by overflows. For details on the watchdog timer
reset, see section 15, Watchdog Timer (WDT).
4.4
This is a reset generated by the RES pin.
When the RES pin is driven low, all the processing in progress is aborted and the LSI enters a
reset state. In order to firmly reset the LSI by pin reset, the RES pin should be held low at least for
10 ms at a power-on. When a reset is input during operation, the RES pin should be held low at
least for 2 ms. Resetting the LSI initializes the internal state of the CPU and the registers of the
on-chip peripheral modules.
4.5
This is an internal reset generated by the watchdog timer.
When the RSTE bit in RSTCSR is set to 1, if the TCNT overflows, a watchdog timer reset is
issued for 518 system clocks.
For details on the watchdog timer reset, see section 15, Watchdog Timer (WDT).
4.6
Reading RSTCSR determines which reset generation source was used to execute the reset
exception handling. Figure 4.2 shows an example of the flow to identify a reset generation source.
Page 100 of 1448
Timer Control/Status Register (TCSR)
Reset Control/Status Register (RSTCSR)
Pin Reset
Watchdog Timer Reset
Determination of Reset Generation Source
H8S/2427, H8S/2427R, H8S/2425 Group
REJ09B0565-0100 Rev. 1.00
Jul 22, 2010
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