R4F24268NVFQV Renesas Electronics America, R4F24268NVFQV Datasheet - Page 454
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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Section 8 EXDMA Controller (EXDMAC)
(2)
In single address mode, the EDACK signal is used instead of the source or destination address
register to transfer data directly between an external device and external memory. In this mode,
the EXDMAC accesses the transfer source or transfer destination external device by outputting the
external I/O strobe signal (EDACK), and at the same time accesses the other external device in the
transfer by outputting an address. In this way, DMA transfer can be executed in one bus cycle. In
the example of transfer between external memory and an external device with DACK shown in
figure 8.3, data is output to the data bus by the external device and written to external memory in
the same bus cycle.
The transfer direction, that is whether the external device with DACK is the transfer source or
transfer destination, can be specified with the SDIR bit in EDMDR. Transfer is performed from
the external memory (EDSAR) to the external device with DACK when SDIR = 0, and from the
external device with DACK to the external memory (EDDAR) when SDIR = 1.
The setting in the source or destination address register not used in the transfer is ignored.
The EDACK pin becomes valid automatically when single address mode is selected. The EDACK
pin is active-low. ETEND pin output can be enabled or disabled by means of the ETENDE bit in
EDMDR. ETEND is output for one bus cycle.
Page 424 of 1372
Single Address Mode
φ
Address bus
RD
WR
ETEND
Figure 8.2 Example of Timing in Dual Address Mode
read cycle
EXDMA
EDSAR
write cycle
EXDMA
EDDAR
H8S/2426, H8S/2426R, H8S/2424 Group
REJ09B0466-0350 Rev. 3.50
Jul 09, 2010
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