h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 79

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

2.4.2
This 24-bit counter indicates the address of the next instruction the CPU will execute. The length
of all CPU instructions is 2 bytes (one word), so the least significant PC bit is ignored. (When an
instruction is fetched for read, the least significant PC bit is regarded as 0.)
2.4.3
EXR does not affect operation in this LSI.
Bit
7
6 to 3
2
1
0
Bit Name
T
—
I2
I1
I0
Extended Control Register (EXR)
Program Counter (PC)
Initial Value R/W
0
All 1
1
1
1
SP (ER7)
R/W
R
R/W
Figure 2.8 Stack
Description
Trace Bit
Does not affect operation in this LSI.
Reserved
These bits are always read as 1.
Interrupt Mask Bits 2 to 0
Do not affect operation in this LSI.
Rev. 3.00 Jan 25, 2006 page 27 of 872
Free area
Stack area
REJ09B0286-0300
Section 2 CPU