HD6475328CG Datasheet, PDF (60/459 Pages) Hitachi Semiconductor – Manual Gives a Hardware Description

Table 3-3 Initial Values of Registers
Register
General registers
15
0
R7 – R0
Control registers
15
0
PC
SR
CCR
15
87
0
T– – – – I2I1I0 – – – – NZVC
7
0
CP
7
0
DP
7
0
EP
7
0
TP
7
0
BR
Minimum Mode
Undetermined
Initial Value
Maximum Mode
Undetermined
Loaded from vector table Loaded from vector table
H'070x
(x: undetermined)
Undetermined
Undetermined
Undetermined
Undetermined
Undetermined
H'070x
(x: undetermined)
Loaded from vector table
Undetermined
Undetermined
Undetermined
Undetermined
3.3 Data Formats
The H8/500 can process 1-bit data, 4-bit BCD data, 8-bit (byte) data, 16-bit (word) data, and 32-
bit (longword) data.
• Bit manipulation instructions operate on 1-bit data.
• Decimal arithmetic instructions operate on 4-bit BCD data.
• Almost all instructions operate on byte and word data.
• Multiply and divide instructions operate on longword data.
3.3.1 Data Formats in General Registers
Data of all the sizes above can be stored in general registers as shown in table 3-4.
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