R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 1238
R0K572030S000BE
Manufacturer Part Number
R0K572030S000BE
Description
KIT DEV FOR SH7203
Manufacturer
Renesas Electronics America
Series
Renesas Starter Kits (RSK)r
Type
MCUr
Specifications of R0K572030S000BE
Contents
CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM
Silicon Manufacturer
Renesas
Kit Contents
Board
Silicon Family Name
SH7203
Silicon Core Number
R5S72030W200FP
Tool / Board Applications
General Purpose MCU, MPU, DSP, DSC
Mcu Supported Families
SH7203
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
SH7203
Lead Free Status / Rohs Status
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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