Datasheet

Section 1 Overview
Rev.7.00 Feb. 14, 2007 page 4 of 1108
REJ09B0089-0700
Item Specification
Power-down state
• Medium-speed mode
• Sleep mode
• Module stop mode
• Software standby mode
• Hardware standby mode
• Variable clock division ratio
Operating modes
• Eight MCU operating modes (H8S/2318 F-ZTAT, H8S/2317 F-ZTAT,
H8S/2315 F-ZTAT, H8S/2314 F-ZTAT)
External Data Bus
Mode
CPU
Operating
Mode
Description
On-Chip
ROM
Initial
Value
Maximum
Value
1 — — — — —
2
3
4 Advanced Disabled 16 bits 16 bits
5
On-chip ROM disabled
expansion mode
8 bits 16 bits
6 On-chip ROM enabled
expansion mode
Enabled 8 bits 16 bits
7 Single-chip mode — —
8 — — — — —
9
10 Advanced Boot mode Enabled 8 bits 16 bits
11 — —
12 — — — — —
13
14 Advanced User program mode Enabled 8 bits 16 bits
15 — —