R5F61663RN50FPV Renesas Electronics America, R5F61663RN50FPV Datasheet - Page 482
R5F61663RN50FPV
Manufacturer Part Number
R5F61663RN50FPV
Description
MCU FLASH 384K ROM 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8SX/1600r
Specifications of R5F61663RN50FPV
Core Processor
H8SX
Core Size
16/32-Bit
Speed
50MHz
Connectivity
EBI/EMI, I²C, IrDA, SCI, SmartCard, USB
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
92
Program Memory Size
384KB (384K x 8)
Program Memory Type
FLASH
Ram Size
40K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; 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
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R5F61663RN50FPV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 482 of 1506
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Section 10 DMA Controller (DMAC)
10.7.2
Bus Arbitration among DMAC and Other Bus Masters
When DMA transfer cycles are consecutively performed, bus cycles of other bus masters may be
inserted between the transfer cycles. The DMAC can release the bus temporarily to pass the bus to
other bus masters.
The consecutive DMA transfer cycles may not be divided according to the transfer mode settings
to achieve high-speed access.
The read and write cycles of a DMA transfer are not separated. Refreshing, external bus release,
and on-chip bus master (CPU, DTC, or EXDMAC) cycles are not inserted between the read and
write cycles of a DMA transfer.
In block transfer mode and an auto request transfer by burst access, bus cycles of the DMA
transfer are consecutively performed. For this duration, since the DMAC has priority over the
CPU and DTC, accesses to the external space is suspended (the IBCCS bit in the bus control
register 2 (BCR2) is cleared to 0).
When the bus is passed to another channel or an auto request transfer by cycle stealing, bus cycles
of the DMAC and on-chip bus master are performed alternatively.
When the arbitration function among the DMAC and on-chip bus masters is enabled by setting the
IBCCS bit in BCR2, the bus is used alternatively except the bus cycles which are not separated.
For details, see section 9, Bus Controller (BSC).
A conflict may occur between external space access of the DMAC and a refreshing cycle,
EXDMAC cycle, or external bus release cycle. Even if a burst or block transfer is performed by
the DMAC, the transfer is stopped temporarily and a cycle of external bus release is inserted by
the BSC according to the external bus priority (when the CPU external access and the DTC
external access do not have priority over a DMAC transfer, the transfers are not operated until the
DMAC releases the bus).
In dual address mode, the DMAC releases the external bus after the external space write cycle.
Since the read and write cycles are not separated, the bus is not released.
An internal space (on-chip memory and internal I/O registers) access of the DMAC and refreshing
cycle, EXDMAC cycle, or an external bus release cycle may be performed at the same time.
Rev. 2.00 Sep. 24, 2008 Page 448 of 1468
REJ09B0412-0200
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