HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 117

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Table 3.2
Legend
S:
L:
OK:
Invalid instruction:
NG:
x:
Before entering the exception handling state, all bits including the DSP extended bits of the SR
registers are saved in the SSR. Before returning from the exception handling, all bits including the
DSP extended bits of the SR must be restored. If the repeat control must be recovered before
entering the exception handling state, the RS and RE registers must be recovered to the value that
existed before exception handling. In addition, if it is necessary to recover modulo control before
entering the exception handling state, the MOD register must be recovered to the value that existed
before exception handling.
Bit
MD
RB
BL
RC
[11:0]
DSP
DMY
DMX
Q
M
I[3:0]
RF[1:0]
S
T
STC instruction
LDC instruction
STC/LDC operation is enabled.
Previous value is retained. No change.
Undefined
Privileged
Mode
MD = 1 &
DSP = 0
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
Operation of SR Bits in Each Processing Mode
User Mode
MD = 0 &
DSP = 0
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
S, L: Illegal
instruction
Exception occurs when an illegal instruction is executed.
Privileged
DSP Mode
MD = 1 &
DSP = 1
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
S: OK, L: OK
User DSP
Mode
MD = 0 &
DSP = 1
S: OK, L: NG
S: OK, L: NG
S: OK, L: NG
R: OK, L: OK
S: OK, L: NG
R: OK, L: OK
R: OK, L: OK
S: OK, L: NG
S: OK, L: NG
S: OK, L: NG
R: OK, L: OK
S: OK, L: NG
S: OK, L: NG
Rev. 1.00, 02/04, page 79 of 804
Access to
DSP-Related
Bit with
Dedicated
Instruction
SETRC
instruction
SETRC
instruction
Initial Value
after Reset
1
1
1
B'000000000000
0
0
0
x
x
B'1111
x
x
x