R4F24278DVFQU Renesas Electronics America, R4F24278DVFQU Datasheet - Page 182
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R4F24278DVFQU
Manufacturer Part Number
R4F24278DVFQU
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 R4F24278DVFQU
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
-40°C ~ 85°C
Package / Case
144-LQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R4F24278DVFQU
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Section 6 Interrupt Controller
6.7
6.7.1
When an interrupt enable bit is cleared to 0 to mask interrupts, the masking becomes effective
after execution of the instruction. When an interrupt enable bit is cleared to 0 by an instruction
such as BCLR or MOV, if an interrupt is generated during execution of the instruction, the
interrupt concerned will still be enabled on completion of the instruction, and so interrupt
exception handling for that interrupt will be executed on completion of the instruction. However,
if there is an interrupt request of higher priority than that interrupt, interrupt exception handling
will be executed for the higher-priority interrupt, and the lower-priority interrupt will be ignored.
The same also applies when an interrupt source flag is cleared to 0. Figure 6.6 shows an example
in which the TCIEV bit in the TPU's TIER_0 register is cleared to 0. The above conflict will not
occur if an enable bit or interrupt source flag is cleared to 0 while the interrupt is masked.
Page 152 of 1448
Internal
address bus
Internal
write signal
TCIEV
TCFV
TCIV
interrupt signal
φ
Usage Notes
Conflict between Interrupt Generation and Disabling
Figure 6.6 Conflict between Interrupt Generation and Disabling
TIER_0 write cycle by CPU
TIER_0 address
TCIV exception handling
H8S/2427, H8S/2427R, H8S/2425 Group
REJ09B0565-0100 Rev. 1.00
Jul 22, 2010
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