Section 8 RAM-FIFO Unit (RFU)
Rev. 3.00 Jan 25, 2006 page 170 of 872
REJ09B0286-0300
8.2.2
Base Address Register (BAR)
BAR is a 16-bit register provided in each pointer set, and allocated to bits 19 to 4 in FSTR. The
base address should be set at the boundary specified by the BUD2 to BUD0 bits in DTCRA.
Otherwise, address specification by the pointer and status display by calculation inter-pointers
may not be performed correctly.
Bit
Bit Name
Initial Value
R/W
Description
31
to
20
—
All 1
R
Base Addresses 31 to 20
These bits are always read as 1 and cannot be
modified.
19
to
4
BA19
to
BA4
Undefined
R/W
Base Addresses 19 to 4
These bits specify a RAM base address that
can be used as the FIFO.
3
to
0
—
All 0
R
Base Addresses 3 to 0
These bits are always read as 0 and cannot be
modified.
8.2.3
Read Address Pointer (RAR)
RAR is an 11-bit pointer provided in each pointer set, and allocated to bits 10 to 0 in FSTR.
Bit
Bit Name
Initial Value
R/W
Description
31
to
11
—
All 0
R
Read Addresses 31 to 11
These bits are always read as 0 and cannot be
modified.
10
to
0
RA10
to
RA0
All 0
R/W
Read Addresses 10 to 0
These bits are pointers to specify the RAM
address to be read from in a RAM read cycle of
the RFU. The RAM address is calculated by
BAR + RAR. These can be read as NRA. These
bits are incremented for the number of bytes to
be read for each RAM read cycle. However,
these bits are not incremented and cleared to 0
when exceeding the selected FIFO size.
Содержание H8S/2158
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Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...