HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 437
HD6417618
Manufacturer Part Number
HD6417618
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417618.pdf
(646 pages)
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15.4.8
HIFDATA is a 32-bit register used to hold data to be written to HIFRAM and data read from
HIFRAM for external device accesses. If HIFDATA is not used when accessing HIFRAM, it can
be used for data transfer between an external device connected to the HIF and the on-chip CPU.
HIFDATA can be read from and written to by the on-chip CPU. Access to HIFDATA by an
external device should be performed with HIFDATA specified by bits REG5 to REG0 in HIFIDX
and the HIFRS pin low.
15.4.9
HIFBCR is a 32-bit register for exclusive control of an external device and the on-chip CPU
regarding access of HIFRAM. HIFBCR can be only read by the on-chip CPU. Access to HIFBCR
by an external device should be performed with HIFBCR specified by bits REG5 to REG0 in
HIFIDX and the HIFRS pin low.
Bit
31 to 0
Bit
31 to 8
7 to 1
HIF Data Register (HIFDATA)
HIF Boot Control Register (HIFBCR)
Bit Name
—
—
Bit Name
D31 to D0 All 0
Initial
Value
Initial
Value
All 0
All 0
R/W
R/W
R/W
R
R/W
Description
32-bit Data
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
AC-Bit Writing Assistance
These bits should be used to write the bit pattern (H'A5)
needed to set the AC bit to 1. These bits are always
read as 0.
Rev. 6.00 Jun. 12, 2007 Page 405 of 610
Section 15 Host Interface (HIF)
REJ09B0131-0600
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