DS72030W200FPV Renesas Electronics America, DS72030W200FPV Datasheet - Page 1238
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DS72030W200FPV
Manufacturer Part Number
DS72030W200FPV
Description
MPU, 32BIT, SH7203, ROMLESS, 240QFP
Manufacturer
Renesas Electronics America
Series
SH7200r
Datasheet
1.R5S72030W200FP.pdf
(1686 pages)
Specifications of DS72030W200FPV
Core Size
32bit
Program Memory Size
32KB
Cpu Speed
200MHz
Digital Ic Case Style
QFP
No. Of Pins
240
Supply Voltage Range
1.1V To 1.3V
Operating Temperature Range
-20°C To +85°C
Svhc
No SVHC
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 1238 of 1686
- Download datasheet (10Mb)
Section 23 USB 2.0 Host/Function Module (USB)
The operation conditions for the TRCLR bit are as noted below.
• If the transactions are being counted and PID = BUF, the current counter cannot be cleared.
• If there is any data left in the buffer, the current counter cannot be cleared.
(f)
Access to FIFO ports in this module has the following restrictions.
• Do not exceed a transfer speed of 48 MB/s.
This module can limit access cycle through the access wait set (FWAIT) bit so that the peripheral
clock frequency is not limited.
The FWAIT bit can be set to each FIFO port, and can be efficiently set according to the CPU
speed, the transfer source access cycle, and so on.
• Conditions
• Example of calculation
(g)
If a unit of data narrower than the bit width specified by the MBW bits in the FIFO port select
register is to be read from a FIFO port, read the data with the bit width specified by the MBW bits
and then use software to discard the unnecessary data.
If a unit of data narrower than the bit width specified by the MBW bits in the FIFO port select
register is to be written to a FIFO port, access the FIFO port as shown in the example below. The
example shows how to write 24-bit-wide data when the FIFO port width has been specified as 32
bits (MBW = 10).
Rev. 3.00 Sep. 28, 2009 Page 1206 of 1650
REJ09B0313-0300
Access direction: writing to FIFO
Peripheral clock frequency: 66 MHz
MBW bit setting value: 10 (32-bit width)
Access type: After transfer data is read from the on-chip memory (the source), it is written to
the FIFO port. In this case, 2 clock cycles are required for source access.
(2 + (FWAIT + 2)) × 1/66 MHz ≥ 1/48 MHz × 4 (32 bits)
FWAIT = 2 (4 clock cycles)
FIFO Port Access Wait Specification
Methods of Accessing FIFO Port for Fractional-Width Data
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