R4F24268NVFQV Renesas Electronics America, R4F24268NVFQV Datasheet - Page 335
![MCU 256K FLASH 48K 144-LQFP](/photos/28/61/286117/144-lqfp__plqp0144ka-a_sml.jpg)
R4F24268NVFQV
Manufacturer Part Number
R4F24268NVFQV
Description
MCU 256K FLASH 48K 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Datasheet
1.R4F24268NVZFQV.pdf
(1406 pages)
Specifications of R4F24268NVFQV
Core Processor
H8S/2600
Core Size
16/32-Bit
Speed
33MHz
Connectivity
EBI/EMI, I²C, IrDA, SCI, SSU, UART/USART
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 10x10b, 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
Eeprom Size
-
Available stocks
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Company:
Part Number:
R4F24268NVFQV
Manufacturer:
Renesas Electronics America
Quantity:
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H8S/2426, H8S/2426R, H8S/2424 Group
6.12
This LSI can release the external bus in response to a bus request from an external device. In the
external bus released state, internal bus masters except the EXDMAC*
long as there is no external access. If any of the following requests are issued in the external bus
released state, the BREQO signal can be driven low to output a bus request externally.
• When an internal bus master wants to perform an external access
• When a refresh request*
• When a SLEEP instruction is executed to place the chip in software standby mode or all-
Notes: *1 Not supported by the H8S/2424 Group.
6.12.1
In externally expanded mode, the bus can be released to an external device by setting the BRLE
bit to 1 in BCR. Driving the BREQ pin low issues an external bus request to this LSI. When the
BREQ pin is sampled, at the prescribed timing the BACK pin is driven low, and the address bus,
data bus, and bus control signals are placed in the high-impedance state, establishing the external
bus released state.
In the external bus released state, internal bus masters except the EXDMAC*
accesses using the internal bus. When an internal bus master wants to make an external access, it
temporarily defers initiation of the bus cycle, and waits for the bus request from the external bus
master to be canceled. If a refresh request is generated in the external bus released state, or if a
SLEEP instruction is executed to place the chip in software standby mode or all-module-clocks-
stopped mode, refresh control and software standby or all-module-clocks-stopped control is
deferred until the bus request from the external bus master is canceled.
If the BREQOE bit is set to 1 in BCR, the BREQO pin can be driven low when any of the
following requests are issued, to request cancellation of the bus request externally.
• When an internal bus master wants to perform an external access
• When a refresh request*
• When a SLEEP instruction is executed to place the chip in software standby mode or all-
REJ09B0466-0350 Rev. 3.50
Jul 09, 2010
module-clocks-stopped mode
module-clocks-stopped mode
*2 The refresh control is not supported by the 5-V version.
Bus Release
Operation
2
2
is generated
is generated
1
continue to operate as
Section 6 Bus Controller (BSC)
1
can perform
Page 305 of 1372
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