D12320VF25IV Datasheet, PDF (109/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 3 MCU Operating Modes
Section 3 MCU Operating Modes
3.1 Overview
3.1.1 Operating Mode Selection (H8S/2328B F-ZTAT, H8S/2326 F-ZTAT)
The H8S/2328B F-ZTAT and H8S/2326 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/2328B F-ZTAT, H8S/2326 F-ZTAT)
MCU
CPU
Operating
Operating
Mode
FWE MD2 MD1 MD0 Mode
Description
External Data
Bus
On-Chip Initial Max
ROM Value Value
1
0001—
—
—
—
—
2
10
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
10
Expanded mode with on-Enabled 8 bits 16 bits
chip ROM enabled
7
1
Single-chip mode
—
—
8
1000—
—
—
—
—
9
1
10
1 0 Advanced Boot mode
Enabled 8 bits 16 bits
11
1
—
—
12
100—
—
—
—
—
13
1
14
1 0 Advanced User program mode Enabled 8 bits 16 bits
15
1
—
—
Rev.6.00 Sep. 27, 2007 Page 77 of 1268
REJ09B0220-0600