Section 3 Mcu Operating Modes; Overview; Operating Mode Selection (H8S/2318 F-Ztat, H8S/2317 F-Ztat, H8S/2315 F-Ztat, And H8S/2314 F-Ztat) - Renesas H8S/2319 series Hardware Manual

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
Operating
Mode FWE MD2 MD1 MD0
1 *
0 0
2 *
3 *
4 1
5
6
7
8 *
1 0
9 *
10
11
12 *
1
13 *
14
15
Note: * Cannot be used in this LSI.

Section 3 MCU Operating Modes

CPU
Operating
Mode
0 1 —
1 0
1
0 0 Advanced Expanded mode with
1
1 0
1
0 0 —
1
1 0 Advanced Boot mode
1
0 0 —
1
1 0 Advanced User program mode
1
Description
—
on-chip ROM disabled
Expanded mode with
on-chip ROM enabled
Single-chip mode
—
—
Rev. 5.00, 12/03, page 69 of 1088
External Data
Bus
On-Chip Initial Max.
ROM Value Value
— — —
Disabled 16 bits 16 bits
8 bits 16 bits
Enabled 8 bits 16 bits
— —
— — —
Enabled 8 bits 16 bits
— —
— — —
Enabled 8 bits 16 bits
— —