h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 173

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Table 6.7
Legend:
6.4.2
This LSI cannot output upper addresses (A23 to A18) in mode 2 (advanced mode) because this
LSI has 18 address output pins (A17 to A0). Therefore, the external address space (H'FFF000 to
H'FFF7FF) can be accessed by specifying the AS/IOS pin as an I/O strobe pin. The 256-kbyte
expansion area (H'F80000 to H'FBFFFF) and CP expansion area (H'FFC000 to H'FFDFFF) can be
accessed by the CS256 pin and CPCS1 pin functions, respectively.
The external address space is initialized as the basic bus interface and a 3-state access space. In
mode 2, the address space other than on-chip ROM, on-chip RAM, internal I/O registers, and their
reserved areas is specified as the external address space. The on-chip RAM and its reserved area
are enabled when the RAME bit in SYSCR is set to 1, and disabled when the RAME bit is cleared
to 0. Addresses H'FF0800 to H'FF7FFF, H'FFE080 to H'FFEFFF, and H'FFFF00 to H'FFFF7F in
the on-chip RAM area and its reserved area are always specified as the external address space.
ASTCP
0
1
: Don’t care
Advanced Mode
WMS21
—
0
Other than
WMS21 = 0 and
WMS20 = 1 or
WMS21 = 1 and
WMS20 = 1
Bus Specifications for CF Expansion Area (Memory Card Mode)/Basic Bus
Interface
WMS20
—
1
WC22
—
—
0
1
WC21
—
—
0
1
0
1
WC20
—
—
0
1
0
1
0
1
0
1
Rev. 3.00 Jan 25, 2006 page 121 of 872
Bus Width
16
16
Bus Specifications
Number of
Access
States
2
3
3
Section 6 Bus Controller
REJ09B0286-0300
Number of
Program
Wait States
0
0
0
1
2
3
4
6
8
10