z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 98

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 41. System Exception Register High (SYSEXCPH)
Table 42. System Exception Register Low (SYSEXCPL)
PS022006-0207
RESET
RESET
FIELD
ADDR
FIELD
ADDR
BITS
BITS
R/W
R/W
System Exception Status Registers
SPOVF
R/W1C
R/W1C
7
0
7
0
When a System Exception occurs the system exception status registers is read to
determine which system exception occurred. These registers are read individually or read
as a 16-bit quantity.
SPOVF—Stack Pointer Overflow
If this bit is 1, a stack pointer overflow exception occurred. Writing 1 to this bit clears it to
0.
PCOVF—Program Counter Overflow
If this bit is 1, a program counter overflow exception occurred. Writing 1 to this bit clears
it to 0.
DIV0—Divide by Zero
If this bit is 1, a divide operation was executed where the denominator was zero. Writing 1
to this bit clear it to 0.
DIVOVF—Divide Over Flow
If this bit is 1, a divide overflow occurred. A divide overflow happens when the result is
greater than FFFFFFFFH. Writing 1 to this bit clears it to 0.
ILL—Illegal Instruction
If this bit is 1, an illegal instruction occurred. Writing 1 to this bit clears it to 0.
PCOVF
R/W1C
R/W1C
6
0
6
0
Reserved
R/W1C
R/W1C
DIV0
5
5
0
0
P R E L I M I N A R Y
DIVOVF
R/W1C
R/W1C
4
0
4
0
FF_E020H
FF_E021H
R/W1C
R/W1C
ILL
3
3
0
0
WDTOSC
R/W1C
R/W1C
2
0
2
0
Product Specification
ZNEO
Reserved
PRIOSC
R/W1C
R/W1C
Interrupt Controller
1
1
0
0
™
Z16F Series
R/W1C
R/W1C
WDT
0
0
0
0
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