CS80C286-12 Intersil, CS80C286-12 Datasheet - Page 12

• Manufacturer Part Number: CS80C286-12
• Description: IC CPU 16BIT 5V 12.5MHZ 68-PLCC
• Manufacturer: Intersil

Specifications of CS80C286-12

• Processor Type: 80C286 16-Bit
• Speed: 12.5MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

Combinations of these three address elements define the six
memory addressing modes, described below.
DIRECT MODE: The operand's offset is contained in the
instruction as an 8 or 16-bit displacement element.
REGISTER INDIRECT MODE: The operand's offset is in
one of the registers SI, Dl, BX or BP.
BASED MODE: The operand's offset is the sum of an 8 or
16-bit displacement and the contents of a base register (BX
or BP).
INDEXED MODE: The operand's offset is the sum of an 8 or 16-
bit displacement and the contents of an index register (SI or Dl).
BASED INDEXED MODE: The operand's offset is the sum
of the contents of a base register and an index register.
BASED INDEXED MODE WITH DISPLACEMENT: The
operand's offset is the sum of a base register's contents, an
index register's contents, and an 8 or 16-bit displacement.
Data Types
The 80C286 directly supports the following data types:
Integer:
Ordinal:
Pointer:
String:
ASClI:
BCD:
Packed
BCD:
Floating
Point:
Figure 5 graphically represents the data types supported by
the 80C286.
A byte representation of alphanumeric and control
A signed binary numeric value contained in an 8-
bit byte or a 16-bit word. All operations assume a
2's complement representation. Signed 32 and
64-bit integers are supported using the 80287
Numeric Data Processor.
An unsigned binary numeric value contained in an
8-bit byte or 16-bit word.
A 32-bit quantity, composed of a segment selec-
tor component and an offset component. Each
component is a 16-bit word.
A contiguous sequence of bytes or words. A string
may contain from 1 byte to 64K bytes.
characters using the ASClI standard of character
representation.
A byte (unpacked) representation of the decimal
digits 0-9.
A byte (packed) representation of two decimal
digits 0-9 storing one digit in each nibble of the
byte.
A signed 32, 64 or 80-bit real number representa-
tion. (Floating point operands are supported using
the 80287 Numeric Processor extension).
80C286
12
NOTE: Supported by 80C286/80C287 Numeric Data Processor
Configuration
POINT (NOTE)
UNSIGNED
UNSIGNED
DECIMAL
FLOATING
POINTER
SIGN BIT
SIGN BIT
SIGN BIT
SIGN BIT
SIGN BIT
DOUBLE
PACKED
SIGNED
SIGNED
SIGNED
SIGNED
BINARY
STRING
CODED
(NOTE)
(NOTE)
WORD
WORD
WORD
WORD
QUAD
(BCD)
BYTE
BYTE
ASCII
BCD
FIGURE 5. 80C286 SUPPORTED DATA TYPES
7/15
CHARACTER
15
31
63
15
31
79 +9
7
7
7
7
7
MAGNITUDE
MAGNITUDE
MOST
SIGNIFICANT DIGIT
BYTE/WORD N BYTE/WORD 1
EXPONENT
14 +1
+7
+1
DIGIT N
MSB
ASCII
MSB
BCD
+N
+N
+N
+N
+3
+3
MSB
MSB
MSB
MAGNITUDE
MAGNITUDE
SELECTOR
+6
+8
48 47
8 7
0
0
0
0
0
0
N
+5
+7
• • •
• • •
• • •
• • •
+2 16
+1
MAGNITUDE
0
0
MAGNITUDE
CHARACTER
+4
+6
32 31
7/15
16
7
7
7
0
0
15
+3
15
DIGIT 1
SIGNIFICANT DIGIT
+5
BCD
ASCII
+1
+1
+1
+1
+1
+1
MAGNITUDE
+2
OFFSET
1
+4
16 15
0
0
0 7
0 7/15
7
7
+1
BYTE/WORD 0
DIGIT 0
ASCII
CHARACTER
+3
BCD
LEAST
0
0
0
0
0
0
0
+2
0
0
0
0
0
0
0
+1
0
0 0