参数资料
型号: CS80C286-16
厂商: Intersil
文件页数: 59/60页
文件大小: 0K
描述: IC CPU 16BIT 5V 16MHZ 68-PLCC
标准包装: 126
处理器类型: 80C286 16-位
速度: 16MHz
电压: 5V
安装类型: 表面贴装
封装/外壳: 68-LCC(J 形引线)
供应商设备封装: 68-PLCC(24.23x24.23)
包装: 管件
8
TABLE 1. FLAGS WORD BIT FUNCTIONS
BIT POSITION
NAME
FUNCTION
0
CF
Carry Flag - Set on high-order bit carry or borrow; cleared otherwise.
2
PF
Parity Flag - Set if low-order 8 bits of result contain an even number of 1 bits; cleared otherwise.
4
AF
Set on carry from or borrow to the low order four bits of AL; cleared otherwise.
6
ZF
Zero Flag - Set if result is zero; cleared otherwise.
7
SF
Sign Flag - Set equal to high-order bit of result (0 if positive, 1 if negative).
11
OF
Overflow Flag - Set if result is a too-large positive number or a too-small negative number (excluding
sign-bit) to fit in destination operand; cleared otherwise.
8
TF
Single Step Flag - Once set, a single step interrupt occurs after the next instruction executes. TF is
cleared by the single step interrupt.
9
IF
Interrupt-Enable Flag - When set, maskable interrupts will cause the CPU to transfer control to an inter-
rupt vector specified location.
10
DF
Direction Flag - Causes string instructions to auto decrement the appropriate index registers when set.
Clearing DF causes auto increment.
CONTROL FLAGS:
TRAP FLAG
INTERRUPT ENABLE
DIRECTION FLAG
SPECIAL FIELDS:
I/O PRIVILEGE LEVEL
NESTED TASK FLAG
TS
EM
MP
PE
CF
PF
AF
ZF
SF
TF
IF
DF
OF
IOPL
NT
FLAGS:
14
15
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
2
3
15
OVERFLOW
SIGN
ZERO
AUXILIARY CARRY
PARITY
CARRY
STATUS FLAGS:
MSW:
RESERVED
TASK SWITCH
PROCESSOR EXTENSION EMULATED
MONITOR PROCESSOR EXTENSION
PROTECTION ENABLE
FIGURE 2. STATUS AND CONTROL REGISTER BIT FUNCTIONS
80C286
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