參數(shù)資料
型號(hào)： EV4101
廠商： LSI Corporation
英文描述： 32-bit Microprocessor that Executes MIPS I,a Subset of MIPS II,and a Subset of the MIPS16 Instructions.(32位微處理器（執(zhí)行MIPS I,MIPS II的子集,MIPS16的子集指令）)
中文描述： 32位微處理器中執(zhí)行MIPS的我，一個(gè)子集的MIPS的第二，以及對(duì)MIPS16指令集。（32位微處理器（執(zhí)行MIPS的我，MIPS的二的子集，MIPS16的子集指令））
文件頁(yè)數(shù)： 12/68頁(yè)
文件大?。?/td> 545K
代理商： EV4101
12
TinyRISC
EV4101 Microprocessor Reference Device Technical Summary
Table 3 shows the format of the BPC Register.
BDA Register (19) –
Software uses the Breakpoint Data Address (BDA)
Register to specify a data address breakpoint. This register is used in
conjunction with the Breakpoint Data Address Mask (BDAM) Register
described later. A breakpoint is detected for any data reference, including
byte and halfword references in which all enabled bits in the BDA
Register match the corresponding bits in the data address. The BDA
Register contents are undefined after reset.
Note that it is the start address of a data element that is used in the
detection; a data breakpoint placed within a word will not be detected
unless the address is explicitly targeted by, for example, an LB
instruction. If, however, bit 1 and bit 0 of the BDAM Register are both 0,
then all accesses to the word are detected.
Table 4 shows the format of the BDA Register.
BPCM Register (20) –
The Breakpoint Program Counter Mask (BPCM)
Register masks bits in the BPC Register. Writing a 1 to bit n of the BPCM
Register enables the bitwise comparison of bit n in the BPC Register with
bit n in the instruction fetch address. Conversely, writing a 0 to bit n of
the BPCM Register disables the comparison, and forces the breakpoint
logic to assume a match between bit n in the BPC and bit n in the
instruction fetch address, regardless of the true result. The BPCM
Register contents are undefined after reset.
Likewise, the M-bit of the BPCM Register enables or disables the bitwise
comparison of the M-bit in the BPC Register with the instruction fetch
mode.
Table 3
BPC Register
31
1
0
Breakpoint Program Counter
M
Table 4
BDA Register
31
0
Breakpoint Data Address
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