SH7751 Datasheet, PDF (986/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

22. PCI Controller (PCIC)
22.2.18 PCI Local Space Register [1:0] (PCILSR [1:0])
Bit: 31
30
29
28
27
26
25
24
—
—
— PLSR28 PLSR27 PLSR26 PLSR25 PLSR24
Initial value:
0
0
0
0
0
0
0
0
PCI-R/W: R
R
R
R
R
R
R
R
PP Bus-R/W: R
R
R
R/W
R/W
R/W
R/W
R/W
Bit: 23
22
21
20
19
18
17
16
PLSR23 PLSR22 PLSR21 PLSR20 —
—
—
—
Initial value:
0
0
0
0
0
0
0
0
PCI-R/W: R
R
R
R
R
R
R
R
PP Bus-R/W: R/W
R/W
R/W
R/W
R
R
R
R
Bit: 15
14
13
12
11
10
9
8
—
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
PCI-R/W: R
R
R
R
R
R
R
R
PP Bus-R/W: R
R
R
R
R
R
R
R
Bit:
7
6
5
4
3
2
1
0
—
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
PCI-R/W: R
R
R
R
R
R
R
R
PP Bus-R/W: R
R
R
R
R
R
R
R
The PCI local space register [1:0] (PCILSR [1:0]) specifies the capacities of the two local address
spaces (address space 0 and address space 1) supported when a device on the PCI bus performs a
memory read/memory write of the PCIC using target transfers. This is a 32-bit register that can be
read and written from the PP bus, or read only from the PCI bus.
The PCILSR [1:0] register is initialized to H'00000000 at a power-on reset and software reset.
Always write to this register before performing target transfers to specify the capacity of the
address space being used. Specify the value “(capacity –1) bytes” in bits 28 to 20. For example, to
secure a 32MB space, set the value H'01F00000.
Rev.4.00 Oct. 10, 2008 Page 888 of 1122
REJ09B0370-0400