R5F61665N50FPV Renesas Electronics America, R5F61665N50FPV Datasheet - Page 548

• Manufacturer Part Number: R5F61665N50FPV
• Description: MCU FLASH 512K ROM 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61665N50FPV

• 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: 512KB (512K 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: -

Section 11 EXDMA Controller (EXDMAC)
(4)
Figure 11.37 shows an example of single address mode transfer activated by the EDREQ pin low
level.
EDREQ pin sampling is performed in each cycle starting at the next rise of Bφ after the end of the
DTE bit write cycle.
When a low level is sampled at the EDREQ pin while acceptance of a transfer request via the
EDREQ pin is possible, the request is held within the EXDMAC. Then when activation is initiated
within the EXDMAC, the request is cleared. After the end of the single cycle, acceptance resumes
and EDREQ pin low level sampling is performed again. This sequence of operations is repeated
until the end of the transfer.
Rev. 2.00 Oct. 21, 2009 Page 514 of 1454
REJ09B0498-0200
Bφ
EDREQ
Address bus
EDACK
EXDMA control
Channel
[1] Acceptance after transfer enabling; EDREQ pin low level is sampled at rise of Bφ, and request is held.
[2], [5] Request is cleared at end of next bus cycle, and activation is started in EXDMAC.
[3], [6] EXDMA cycle starts.
[4], [7] Acceptance is resumed after completion of single cycle.
(As in [1], EDREQ pin low level is sampled at rise of Bφ, and request is held.)
EDREQ Pin Low Level Activation Timing
Figure 11.37 Example of Single Address Mode Transfer Activated
Idle
[1]
Request
Minimum 3 cycles
release
[2]
Bus
Request clearance period
by EDREQ Pin Low Level
Single
[3]
EXDMA single
Transfer destination
Transfer source/
Idle
Acceptance resumed
[4]
Minimum 3 cycles
Request
[5]
release
Bus
Request clearance period
Single
[6]
EXDMA single
Transfer destination
Transfer source/
Acceptance resumed
Idle
[7]
release
Bus