R4F24569NVFQV Renesas Electronics America, R4F24569NVFQV Datasheet - Page 423
R4F24569NVFQV
Manufacturer Part Number
R4F24569NVFQV
Description
MCU 256KB FLASH 64K 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Specifications of R4F24569NVFQV
Core Processor
H8S/2600
Core Size
16/32-Bit
Speed
32MHz
Connectivity
EBI/EMI, I²C, IrDA, SCI, SSU, UART/USART, USB
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
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
Eeprom Size
-
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H8S/2456, H8S/2456R, H8S/2454 Group
(4)
Set the DTA bit in DMABCRH to 1 for the channel for which the DREQ pin is selected.
Figure 7.31 shows an example of single address mode transfer activated by the DREQ pin low
level.
DREQ pin sampling is performed every cycle, with the rising edge of the next φ cycle after the
end of the DMABCR write cycle for setting the transfer enabled state as the starting point.
REJ09B0467-0350 Rev. 3.50
Jul 07, 2010
Figure 7.31 Example of DREQ Pin Low Level Activated Single Address Mode Transfer
Address bus
DMA control
[1]
[2] [5] The request is cleared at the next bus break, and activation is started in the DMAC.
[3] [6] The DMAC cycle is started.
[4] [7] Acceptance is resumed after the single cycle is completed.
Note: In write data buffer mode, bus breaks from [2] to [7] may be hidden, and not visible.
DREQ Pin Low Level Activation Timing
Channel
DREQ
DACK
Acceptance after transfer enabling; the DREQ pin low level is sampled on the rising edge of φ,
and the request is held.
(As in [1], the DREQ pin low level is sampled on the rising edge of φ, and the request is held.)
φ
Idle
[1]
Request
Bus release
Minimum of
2 cycles
[2]
[3]
Single
Request clear
Transfer source/
DMA single
destination
period
Acceptance resumes
Idle
[4]
Request
Bus release
Minimum of
2 cycles
[5]
[6]
Single
Section 7 DMA Controller (DMAC)
Request clear
DMA single
Transfer source/
period
destination
Acceptance resumes
Idle
[7]
Page 393 of 1392
release
Bus
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