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Dedicated Register
Accumulator (A)
User stack pointer (USP)
System stack pointer (SSP)
Processor status (PS)
Program counter (PC)
Direct page register (DPR)
Program bank register (PCB)
Data bank register (DTB)
User stack bank register (USB)
System stack bank register (SSB)
Additional data bank register (ADB)
— : Not used
x : Undefined
Note:
The above initial values are the device initial values, not for the ICE (such as emulator). In other
words, the ICE initial values are different from those of the device.
Table 2-3 Initial Values of Dedicated Registers
bit 15 to bit 13 bit 12
PS
ILM
0
0
Value in reset vector (data at FFFFDC
Value in reset vector (data at FFFFDE
CPU
Initial Value
Undefined
Undefined
Undefined
to
bit 8 bit 7
RP
0
0
0
0
0
0
01
H
00
H
00
H
00
H
00
H
2-15
to
CCR
—
0
1
x
x
x
x
and FFFFDD
)
H
H
)
H
bit 0
x
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