Renesas H8S/2318 series, Hardware Manual

Page: 99 / 1121

Rev. 5.00, 12/03, page 69 of 1088
Section 3 MCU Operating Modes
3.1 Overview
3.1.1 Operating Mode Selection (H8S/2318 F-ZTAT, H8S/2317 F-ZTAT,
H8S/2315 F-ZTAT, and H8S/2314 F-ZTAT)
The H8S/2318 F-ZTAT, H8S/2317 F-ZTAT, H8S/2315 F-ZTAT, and H8S/2314 F-ZTAT have
eight operating modes (modes 4 to 7, 10, 11, 14 and 15). These modes are determined by the mode
pin (MD2 to MD0) and flash write enable pin (FWE) settings. The CPU operating mode and
initial bus width can be selected as shown in table 3-1.
Table 3-1 lists the MCU operating modes.
Table 3-1 MCU Operating Mode Selection (H8S/2318 F-ZTAT, H8S/2317 F-ZTAT,
H8S/2315 F-ZTAT, and H8S/2314 F-ZTAT)
MCU CPU
External Data
Bus
Operating
Mode
FWE MD2 MD1 MD0
Operating
Mode
Description
On-Chip
ROM Initial
Value Max.
Value
1
*
0 0 0 1 — — — — —
2
*
1 0
3
*
1
4 1 0 0 Advanced Expanded mode with Disabled 16 bits 16 bits
5 1
on-chip ROM disabled
8 bits 16 bits
6 1 0 Expanded mode with
on-chip ROM enabled Enabled 8 bits 16 bits
7 1 Single-chip mode — —
8
*
1 0 0 0 — — — — —
9
*
1
10 1 0 Advanced Boot mode Enabled 8 bits 16 bits
11 1 — —
12
*
1 0 0 — — — — —
13
*
1
14 1 0 Advanced User program mode Enabled 8 bits 16 bits
15 1 — —
Note:
*
Cannot be used in this LSI.