HD6417705F133BV Renesas Electronics America, HD6417705F133BV Datasheet - Page 510

• Manufacturer Part Number: HD6417705F133BV
• Description: MPU 3V 0K PB-FREE 208 FP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417705F133BV

• Core Processor: SH-3
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: EBI/EMI, FIFO, IrDA, SCI, USB
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 105
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

18.4.5
EP2 has two 64-byte FIFOs, but the user can transmit data and write transmit data without being
aware of this dual-FIFO configuration. However, one data write is performed for one FIFO. For
example, even if both FIFOs are empty, it is not possible to perform EP2PKTE at one time after
consecutively writing 128 bytes of data. EP2PKTE must be performed for each 64-byte write.
When performing bulk-in transfer, as there is no valid data in the FIFOs on reception of the first
IN token, an EP2TR bit interrupt in IFR0 is requested. With this interrupt, 1 is written to the
EP2EMPTY bit in IER0, and the EP2 FIFO empty interrupt is enabled. At first, both EP2 FIFOs
are empty, and so an EP2 FIFO empty interrupt is generated immediately.
The data to be transmitted is written to the data register using this interrupt. After the first transmit
data write for one FIFO, the other FIFO is empty, and so the next transmit data can be written to
the other FIFO immediately. When both FIFOs are full, EP2 EMPTY is cleared to 0. If at least one
FIFO is empty, the EP2EMPTY bit in IFR0 is set to 1. When ACK is returned from the host after
Rev. 2.00, 09/03, page 462 of 690
EP2 Bulk-In Transfer (Dual FIFOs)
Data transmission to host
Clear EP2 empty status
(IFR0.EP2 EMPTY = 0)
IN token reception
in EP2 FIFO?
in EP2 FIFO?
Valid data
Space
Figure 18.11 EP2 Bulk-In Transfer Operation
Yes
No
ACK
USB function
No
Yes
NACK
empty status
EMPTY = 1)
(IFR0.EP2
Set EP2
Interrupt request
Interrupt
request
Write one packet of data
(IER0.EP2 EMPTY = 1)
Write 1 to EP2 packet
(TRG.EP2 PKTE = 1)
to EP2 data register
Clear EP2 transfer
(IFR0.EP2 TR = 0)
Application
IER0.EP2 EMPTY
Enable EP2 FIFO
empty interrupt
request flag
enable bit
(EPDR2)
interrupt