Rev. 2.00, 09/03, page 552 of 690
22.2.10
Execution Times Break Register (BETR)
BETR is a 16-bit readable/writable register. When the execution-times break condition of channel
B is enabled, this register specifies the number of execution times to make the break. The
maximum number is 2
12
– 1 times. When a break condition is satisfied, it decrements the BETR
value. A break is issued when the break condition is satisfied after BETR becomes H'0001.
Bit
Bit
Name
Initial
Value
R/W
Description
15 to
12
0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
11 to 0
BET11 to
BET0
0
R/W
Number of Execution Times
Note:
If the channel B brake condition set to during instruction fetch cycles and any of the
instructions below perform breaks, BETR is not decremented when the first break occurs.
The decremented values are listed below.
Instruction
Value
Decremented
Instruction
Value
Decremented
RTE
4
LDC.L @Rm+,SR
6
DMULS.L Rm,Rn
2
LDC.L @Rm+,GBR
4
DMULU.L Rm,Rn
2
LDC.L @Rm+,VBR
4
MAC.L @Rm+,@Rn+
2
LDC.L @Rm+,SSR
4
MAC.W @Rm+,@Rn+
2
LDC.L @Rm+,SPC
4
MUL.L Rm,Rn
3
LDC.L @Rm+,R0_BANK
4
AND.B #imm,@(R0,GBR)
3
LDC.L @Rm+,R1_BANK
4
OR.B #imm,@(R0,GBR)
3
LDC.L @Rm+,R2_BANK
4
TAS.B @Rn
3
LDC.L @Rm+,R3_BANK
4
TST.B #imm,@(R0,GBR)
3
LDC.L @Rm+,R4_BANK
4
XOR.B #imm,@(R0,GBR)
3
LDC.L @Rm+,R5_BANK
4
LDC Rm,SR
4
LDC.L @Rm+,R6_BANK
4
LDC Rm,GBR
4
LDC.L @Rm+,R7_BANK
4
LDC Rm,VBR
4
LDC.L @Rn+,MOD
4
LDC Rm,SSR
4
LDC.L @Rn+,RS
4
LDC Rm,SPC
4
LDC.L @Rn+,RE
4
LDC Rm,R0_BANK
4
LDC Rn,MOD
4
LDC Rm,R1_BANK
4
LDC Rn,RS
4
LDC Rm,R2_BANK
4
LDC Rn,RE
4
LDC Rm,R3_BANK
4
BSR label
2
LDC Rm,R4_BANK
4
BSRF Rm
2
LDC Rm,R5_BANK
4
JSR @Rm
2
LDC Rm,R6_BANK
4
LDC Rm,R7_BANK
4
Содержание SH7705
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