HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 436
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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Section 15 Host Interface (HIF)
15.4.7
HIFADR is a 32-bit register which indicates the address in HIFRAM to be accessed by an external
device. When using the LOCK bit setting in HIFMCR to specify consecutive access of HIFRAM,
auto-increment (+4) or auto-decrement (-4) of the address, according to the AI/AD bit setting in
HIFMCR, is performed automatically, and HIFADR is updated. HIFADR can be only read by the
on-chip CPU. Access to HIFADR by an external device should be performed with HIFADR
specified by bits REG5 to REG0 in HIFIDX and the HIFRS pin low.
Note:
Rev. 6.00 Jun. 12, 2007 Page 404 of 610
REJ09B0131-0600
Bit
7
6
5
4
3
2
1
0
Bit
31 to 10
9 to 2
1, 0
*
Bit Name
EIC6
EIC5
EIC4
EIC3
EIC2
EIC1
EIC0
EIR
HIF Address Register (HIFADR)
Bit Name
—
A9 to A2
—
This bit can be only written to by an external device when the HIFRS pin is low. It
cannot be written to by the on-chip CPU.
Initial
Value
0
0
0
0
0
0
0
0
Initial
Value
All 0
All 0
All 0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R/W*
R
Description
External Interrupt Source
These bits specify the source for interrupts generated by
the EIR bit. These bits can be written to from both an
external device and the on-chip CPU. By using these
bits, fast execution of interrupt exception handling is
possible. These bits are completely under software
control, and their values have no effect on the operation
of this LSI.
External Interrupt Request
While this bit is 1, the HIFINT pin is asserted to issue an
interrupt request to an external device from this LSI.
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
HIFRAM Address Specification
These bits specify the address of HIFRAM to be
accessed by an external device, with 32-bit boundary.
Reserved
These bits are always read as 0. The write value should
always be 0.
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