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32186 Datasheet(PDF) 39 Page - Renesas Technology Corp

Part # 32186
Description  MCU
PDF  1032 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

32186 Datasheet(HTML) 39 Page - Renesas Technology Corp

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2
CPU
2-3
32185/32186 Group Hardware Manual
Rev.1.10 REJ09B0235-0110 May 15, 07
2.3 Control Registers
2.3.1 Processor Status Word Register: PSW (CR0)
<Upon exiting reset: B’0000 0000 0000 0000 ??00 000? 0000 0000>
b
Bit Name
Function
R
W
0–15
No function assigned. Fix to "0."
00
16
BSM
Saves value of SM bit when EIT occurs
R
W
Backup SM Bit
17
BIE
Saves value of IE bit when EIT occurs
R
W
Backup IE Bit
18–22
No function assigned. Fix to "0."
00
23
BC
Saves value of C bit when EIT occurs
R
W
Backup C Bit
24
SM
0: Uses R15 as the interrupt stack pointer
R
W
Stack Mode Bit
1: Uses R15 as the user stack pointer
25
IE
0: Does not accept interrupt
R
W
Interrupt Enable Bit (Note 1)
1: Accepts interrupt
26–30
No function assigned. Fix to "0."
00
31
C
Indicates carry, borrow or overflow resulting
R
W
Condition Bit
from operations (instruction dependent)
Note 1: Interrupt which is controllable is External Interrupt (EI). Reserved Instruction Exception (RIE), Address Except
(AE), FP Floating-point Except (FPE), Reset Interrupt (RI), System Break Interrupt (SBI) and Trap are not
controled.
The Processor Status Word Register (PSW) indicates the M32R-FPU status. It consists of the current PSW
field which is regularly used, and the BPSW field where a copy of the PSW field is saved when EIT occurs.
The PSW field consists of the Stack Mode (SM) bit, the Interrupt Enable (IE) bit and the Condition (C) bit.
The BPSW field consists of the Backup Stack Mode (BSM) bit, the Backup Interrupt Enable (BIE) bit and
the Backup Condition (BC) bit.
Upon exiting the reset state, BSM, BIE and BC are undefined. All other bits are "0."
0000
0
00
0
0
0
0
0
0
0
7
6
5
4
3
2
1
8
9
101112
13
14
b15
b0
?
?
00000?00000000
BC
SM
IE
C
23
24
25
26
27
28
29
30
b31
17
18
19
20
21
22
b16
BIE
BSM
BPSW field
00
PSW field



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