m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 51
m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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of the SFR and internal RAM areas immediately after reset.
RESET
3.3 State of internal area
3.3 State of internal area
Figure 3.3.1 shows the state of CPU registers immediately after reset. Figures 3.3.2 to 3.3.9 show the state
Fig. 3.3.1 State of CPU registers immediately after reset
3-6
0
1
?
Processor status register (PS)
: “0” immediately after reset.
: “1” immediately after reset.
: Undefined immediately after reset.
Program bank register (PG)
Direct page register 0 (DPR0)
Direct page register i (DPRi)
Data bank register (DT)
Program counter (PC)
Index register X (X)
Index register Y (Y)
Accumulator A (A)
Accumulator B (B)
Register name
Stack pointer (S)
(i = 1 to 3)
b15
b15
b15
b15
b15
b15
b15
b15
b15
0
Contents at address FFFF
7905 Group User’s Manual Rev.1.0
0
0
0
0
0F
00
?
?
?
?
?
16
16
State immediately after reset
0
: “0” immediately after reset.
Fix this bit to “0.”
0
IPL
0
16
b8
b8
b8
b8
b8
b8
b8
b8
b8
0
b7
b7
b7
b7
b7
b7
b7
b7
b7
b7
b7
N
?
Contents at address FFFE
V
?
m
0
0
x
00
00
00
?
?
?
?
?
FF
16
16
16
D
0
16
1
I
?
Z
16
b0
b0
b0
b0
b0
b0
b0
b0
b0
b0
b0
C
?
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