M30245FCGP#U1 Renesas Electronics America, M30245FCGP#U1 Datasheet - Page 78

• Manufacturer Part Number: M30245FCGP#U1
• Description: IC M16C/24 MCU FLSH 128K 100LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/20r

Specifications of M30245FCGP#U1

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, SSI, UART/USART, USB
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-LQFP
• Package: 100LQFP
• Family Name: R8C
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 82
• Interface Type: USB/UART/I2C/SPI
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M30245 Group
Rev.2.00
REJ03B0005-0200
Table 1.35. Endpoint 1-4 IN buffer status
IN Endpoint FIFO Flush
IN_BUF_STS1
Double Buffer Mode:
After the CPU writes a data set equal to its buffer size to the buffer, the USB FCU updates the IN_BUF_STS1 &
IN_BUF_STS0 flags.
• If the buffer is immediately available to accept another data set, the buffer status flags transition from 00
• If the buffer is not available to accept another data set, the buffer status flags transition from 01
The USB FCU sends out data packets equal to the MAXP size one at a time, except for the last packet.
• If the data in the buffer is not a multiple of the MAXP, the USB FCU sends a short packet.
The USB FCU updates the buffers status flags after a data set has been successfully transmitted to the host.
• If the buffer has one more data set in it, the buffer status flags transition from 11
• If the buffer has no more data set in it, the buffer status flags transition from 01
• If the data set is less than the buffer size, the CPU must write "1" to the SET_IN_BUF_RDY bit to signify the data set
is ready to send.
A software or a hardware flush causes the USB FCU to act (in both continuous and noncontinuous transfer modes)
as if a data set has been successfully transmitted out to the host. When there is one data set in the buffer, a flush
causes the buffer to be empty. When there are two data sets in the buffer, a flush causes the older data set to be
flushed out from the buffer. A flush also updates the buffer status flags of the corresponding EPx IN CSR.
The Endpoint 1-4 IN buffer status can be obtained from the two status bits of the EPx IN CSR of the corresponding
endpoint as shown in Table 1.35.
0
0
1
1
Oct 16, 2006
IN_BUF_STS0
page 76 of 264
0
1
0
1
No data set in the IN buffer
Single buffer mode:
Double buffer mode:
Single buffer mode:
Double buffer mode:
Single buffer mode:
Double buffer mode:
One data set in the IN Buffer
Buffer Status
N/A
N/A
N/A
One data set in the IN buffer
Two data sets in the IN buffer
2
2
to 00
to 01
2
.
2
.
Universal Serial Bus
2
to 11
2
.
2
to 01
2
.