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參數(shù)資料
| 型號(hào)： | P90CE201 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 16-bit microcontroller |
| 中文描述： | 16位微控制器 |
| 文件頁(yè)數(shù)： | 15/77頁(yè) |
| 文件大小： | 235K |
| 代理商： | P90CE201 |
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August 1993
15
Philips Semiconductors
Product specification
16-bit microcontroller
P90CE201
5.5.2
T
HE
S
PECIAL
S
TATUS
W
ORD
(SSW)
Fig.8 Special Status Word.
handbook, full pagewidth
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
bit
FC
1
RR
*
IF
DF RM
HB
BY RW HW LC
*
*
*
FC
0
FC
2
MCD513
Table 4
Description of SSW.
Table 5
Internal function codes.
SYMBOL
BIT
FUNCTION
RR
SSW.15
Rerun. By default this bit is a logic 0. If set to a logic 1, the CPU will not re-run the
faulty bus cycle on return from exception (RTE).
Undefined, reserved
The faulty cycle was an instruction fetch.
The faulty cycle was a data fetch.
The error occurred during a read-modify-write cycle.
High Byte
The faulty cycle was a byte transfer.
Read/Write cycle
High Word
The faulty cycle was during a long-word access.
Undefined, reserved
Undefined, reserved
Undefined, reserved
Function Code. These three bits hold the internal function code during the faulty
bus cycle. The function codes are the same as for the 68000 and affect the status
of the CPU during the faulty bus cycle. See Table 5.
IF
DF
RM
HB
BY
RW
HW
LC
FC2
FC1
FC0
SSW.14
SSW.13
SSW.12
SSW.11
SSW.10
SSW.9
SSW.8
SSW.7
SSW.6
SSW.5
SSW.4
SSW.3
SSW.2
SSW.1
SSW.0
FC2
FC1
FC0
ADDRESS SPACE
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Reserved
User data
User program
Reserved
Reserved
Supervisor data
Supervisor program
Interrupt acknowledge
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