Datasheet
Section 23 Power-Down Modes 
R01UH0310EJ0500 Rev. 5.00    Page 1149 of 1384 
Sep 25, 2012     
H8S/2426, H8S/2426R, H8S/2424 Group 
•  EXMSTPCRL 
Bit  Bit Name  Initial Value  R/W  Module 
7  MSTP23  1  R/W  Synchronous serial communication unit (SSU) 
6 MSTP22  1  R/W I
2
C bus interface 2_3 (IIC2_3) 
5 MSTP21  1  R/W I
2
C bus interface 2_2 (IIC2_2) 
4 MSTP20  1  R/W I
2
C bus interface 2_1 (IIC2_1) 
3 MSTP19  1  R/W I
2
C bus interface 2_0 (IIC2_0) 
2 MSTP18  1  R/W Reserved 
This bit can be read or written to. The write value 
should always be 1. 
1 MSTP17  1  R/W Reserved 
This bit can be read or written to. The write value 
should always be 1. 
0 MSTP16  1  R/W ⎯ 
23.1.4  RAM Module Stop Control Registers H and L (RMMSTPCRH, RMMSTPCRL) 
RMMSTPCR performs module stop state control of the RAM area. Setting bits MSTP32 to 
MSTP39 to 1 stops the corresponding on-chip RAM area. During access to an on-chip RAM area, 
do not set bits MSTP32 to MSTP39 corresponding to the area to 1. While bit RAME in SYSCR is 
1, and bits MSTP32 to MSTP39 are 1, do not access the corresponding RAM area. 
•  RMMSTPCRH 
Bit  Bit Name  Initial Value  R/W  Module 
15 MSTP47 0  R/W  ⎯ 
14 MSTP46 0  R/W  ⎯ 
13 MSTP45 0  R/W  ⎯ 
12 MSTP44 0  R/W  ⎯ 
11 MSTP43 0  R/W  ⎯ 
10 MSTP42 0  R/W  ⎯ 
9 MSTP41 0  R/W ⎯ 
8 MSTP40 0  R/W ⎯ 










