R4F24268NVFQV Renesas Electronics America, R4F24268NVFQV Datasheet - Page 339
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
-
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H8S/2426, H8S/2426R, H8S/2424 Group
6.13
This LSI has a bus arbiter that arbitrates bus mastership operations (bus arbitration).
There are four bus masters⎯the CPU, DTC, DMAC, and EXDMAC*⎯that perform read/write
operations when they have possession of the bus. Each bus master requests the bus by means of a
bus request signal. The bus arbiter determines priorities at the prescribed timing, and permits use
of the bus by means of a bus request acknowledge signal. The selected bus master then takes
possession of the bus and begins its operation.
Note: * The EXDMAC is not supported by the H8S/2424 Group.
6.13.1
The bus arbiter detects the bus masters' bus request signals, and if the bus is requested, sends a bus
request acknowledge signal to the bus master. If there are bus requests from more than one bus
master, the bus request acknowledge signal is sent to the one with the highest priority. When a bus
master receives the bus request acknowledge signal, it takes possession of the bus until that signal
is canceled.
The order of priority of the bus mastership is as follows:
An internal bus access by internal bus masters except the EXDMAC*
refresh when the CBRM bit is 0, and an external bus access by the EXDMAC*
parallel.
If an external bus release request, a refresh request*
master occur simultaneously, the order of priority is as follows:
As a refresh*
DRAM space by an internal bus master can be executed simultaneously, there is no relative order
of priority for these two operations.
Notes: 1. Not supported by the 5-V version.
REJ09B0466-0350 Rev. 3.50
Jul 09, 2010
(High) EXDMAC*
(High) Refresh*
(High) External bus release > External access by internal bus master except EXDMAC*
2. The EXDMAC is not supported by the H8S/2424 Group.
Bus Arbitration
Operation
1
when the CBRM bit in REFCR is cleared to 0 and an external access other than to
1
> EXDMAC*
2
> DMAC > DTC > CPU (Low)
2
> External bus release (Low)
1
, and an external access by an internal bus
2
and external bus release, a
Section 6 Bus Controller (BSC)
2
can be executed in
Page 309 of 1372
2
(Low)
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