Datasheet

Section 3 MCU Operating Modes
Rev. 4.00 Jun 06, 2006 page 79 of 1004
REJ09B0301-0400
3.4 Pin Functions in Each Operating Mode
The pin functions of ports 1 to 3, and 9 vary depending on the operating mode. Table 3.3 shows
their functions in each operating mode.
Table 3.3 Pin Functions in Each Mode
Port Mode 1 Mode 2 Mode 3
Port 1 A P
*
/A P
*
/A
Port 2 A P
*
/A P
*
/A
Port 3 D P
*
/D P
*
/D
Port 9 P97 P
*
/C P
*
/C P
*
/C
P96 C
*
/P P
*
/C P
*
/C
P95 to P93 C P
*
/C P
*
/C
P92 to P90 P P P
Legend:
P: I/O port
A: Address bus output
D: Data bus I/O
C: Control signals, clock I/O
*: After reset
3.5 Memory Map in Each Operating Mode
Figures 3.1 to 3.4 show memory maps for each of the operating modes.
The address space is 64 kbytes in modes 1 and 3 (normal modes), and 16 Mbytes in mode 2
(advanced mode).
The on-chip ROM capacity is 32 kbytes (H8S/2130), 64 kbytes (H8S/2132 and H8S/2137), 96
kbytes (H8S/2133), or 128 kbytes (H8S/2134 and H8S/2138), but for products with an on-chip
ROM capacity of 64 kbytes or more, the amount of on-chip ROM that can be used is limited to 56
kbytes in mode 3 (normal mode). Do not access the reserved area and addresses of modules not
supported by the product. Note that normal operation is not guaranteed when these regions are
accessed.
For details, see section 6, Bus Controller.