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參數(shù)資料
| 型號： | M32000D3FP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片32位CMOS微機 |
| 文件頁數(shù)： | 10/45頁 |
| 文件大?。?/td> | 565K |
| 代理商： | M32000D3FP |
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SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
M32000D3FP
10
Processor status word register: PSW (CR0)
The processor status word register (PSW) shows the M32R CPU
status. It consists of the current PSW field, and the BPSW field where
a copy of the PSW field is saved when EIT occurs.
The PSW field is made up of the stack mode bit (SM), the interrupt
enable bit (IE) and the condition bit (C). The BPSW field is made up
of the backup stack mode bit (BSM), the backup interrupt enable bit
(BIE) and the backup condition bit (BC).
Note:
"init." ...initial state immediately after reset
"R" ....
: read enabled
"W"....
: write enabled
D
bit name
function
init.
R
W
16
BSM (backup SM)
saves value of SM bit when EIT occurs
undefined
17
BIE (backup IE)
saves value of IE bit when EIT occurs
undefined
23
BC (backup C)
saves value of C bit when EIT occurs
undefined
24
SM (stack mode)
0: uses R15 as the interrupt stack pointer
1: uses R15 as the user stack pointer
0: does not accept interrupt
1: accepts interrupt
indicates carry, borrow and overflow resulting
from operations (instruction dependent)
0
25
IE (interrupt enable)
0
31
C (condition bit)
0
Fig. 3 Processor status word register
16 17
23 24 25
31
15
0
8
0
7
0
0
0
SM
IE
C
BC
BSM
BIE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
PSW
BPSW field
PSW field
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