r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 656
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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13. PCI Controller (PCIC)
Rev.1.00 Jan. 10, 2008 Page 626 of 1658
REJ09B0261-0100
Bit
31 to 5
4 to 2
1, 0
Bit Name
⎯
RANGE
SNPMD
Initial
Value
All 0
All 0
All 0
R/W
SH: R
PCI: —
SH: R/W
PCI: —
SH: R/W
PCI: —
Description
Reserved
These bits are always read as 0. The write value
should always be 0.
Address Range to be Compared
These bits specify the address range of PCICSAR1 to
be compared.
000: Compared with PCICSAR1.CADR[31:12] (4 kbytes)
001: Compared with PCICSAR1.CADR[31:16] (64 kbytes)
010: Compared with PCICSAR1.CADR[31:20] (1 Mbyte)
011: Compared with PCICSAR1.CADR[31:24] (16 Mbytes)
100: Compared with PCICSAR1.CADR[31:25] (32 Mbytes)
101: Compared with PCICSAR1.CADR[31:26] (64 Mbytes)
110: Compared with PCICSAR1.CADR[31:27] (128 Mbytes)
111: Compared with PCICSAR1.CADR[31:28] (256 Mbytes)
Valid only when PCICSCR1.SNPMD = 10 or 11.
Snoop Mode for PCICSAR1
These bits specify whether PCICSAR1 is compared
with the SuperHyway bus address requested by an
external device, or not. When PCICSAR1 is specified
to be compared, a condition to issue snoop
commands can be specified.
00: PCICSAR1 not compared
01: Reserved (setting prohibited)
10: PCICSAR1 is compared. If the address matches
11: PCICSAR1 is compared. If the address matches
PCICSAR1 in the range, snoop commands are
not issued. If not, snoop commands are issued.
PCICSAR1 in the range, snoop commands are
issued. If not, snoop commands are not issued.
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