參數(shù)資料
型號(hào)： M32000D4BFP-80
廠商： Mitsubishi Electric Corporation
英文描述： Single Chip 32 Bits Microcomputer(32位 單片機(jī))
中文描述： 32位單片微機(jī)（32位單片機(jī)）
文件頁(yè)數(shù)： 12/44頁(yè)
文件大?。?/td> 448K
代理商： M32000D4BFP-80
SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
M32000D4BFP-80
12
Accumulator
The accumulator (ACC) is a 64-bit register used for DSP type func-
tions. Use the
MVTACHI
and
MVTACLO
instructions for writing to
the accumulator. The high-order 32 bits (bit 0 - bit 31) can be set with
the
MVTACHI
instruction and the low-order 32 bits (bit 32 - bit 63)
can be set with the
MVTACLO
instruction. Use the
MVFACHI
,
MVFACLO
and
MVFACMI
instructions for reading from the accumu-
lator. The high-order 32 bits (bit 0 - bit 31) are read with the
MVFACHI
instruction, the low order 32 bits (bit 32 - bit 63) with the
MVFACLO
instruction and the middle 32 bits (bit 16 - bit 47) with the
MVFACMI
instruction.
Program counter
The program counter (PC) is a 32-bit counter that retains the ad-
dress of the instruction being executed. Since the M32R CPU in-
struction starts with even-numbered addresses, the LSB (bit 31) is
always "0".
Fig. 5 Accumulator
31
0
0
PC
PC
Fig. 6 Program counter
32
48
63
31
16
15
0
47
7 8
ACC
(see note)
read/write range with
MVTACLO or MVFACLO instruction
read/write range with
MVTACHI or MVFACHI instruction
read range with MVFACMI instruction
Note:
Bits 0 - 7 are always read as the sign-extended value of bit 8.
An attempt to write to this area is ignored.
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