R5F61668RN50FPV Renesas Electronics America, R5F61668RN50FPV Datasheet - Page 1052

• Manufacturer Part Number: R5F61668RN50FPV
• Description: IC H8SX/1668 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61668RN50FPV

• 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: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 56K 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
• For Use With: R0K561668S000BE - KIT STARTER FOR H8SX/1668R0K561664S001BE - KIT STARTER FOR H8SX/1651HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 20 USB Function Module (USB)
20.5.5
EP1 has two 64-byte FIFOs, but the user can receive data and read receive data without being
aware of this dual-FIFO configuration.
When one FIFO is full after reception is completed, the EP1FULL bit in IFR0 is set. After the first
receive operation into one of the FIFOs when both FIFOs are empty, the other FIFO is empty, and
so the next packet can be received immediately. When both FIFOs are full, NACK is returned to
the host automatically. When reading of the receive data is completed following data reception, 1
is written to the EP1RDFN bit in TRG. This operation empties the FIFO that has just been read,
and makes it ready to receive the next packet.
Rev. 2.00 Sep. 24, 2008 Page 1018 of 1468
REJ09B0412-0200
EP1 Bulk-Out Transfer (Dual FIFOs)
Clear EP1 FIFO full status
Data reception from host
Set EP1 FIFO full status
(IFR0.EP1 FULL = 1)
(IFR0.EP1 FULL = 0)
OUT token reception
EP1 FIFOs empty?
in EP1 FIFO?
USB function
Figure 20.17 EP1 Bulk-Out Transfer Operation
Space
Both
Yes
Yes
ACK
NACK
No
No
Interrupt
request
Interrupt request
Read EP1 receive data
data register (EPDR1)
(TRG.EP1 RDFN = 1)
size register (EPSZ1)
Read data from EP1
Write 1 to EP1 read
complete bit
Application