PIC16C56A/JW Microchip Technology, PIC16C56A/JW Datasheet - Page 51

• Manufacturer Part Number: PIC16C56A/JW
• Description: IC MCU EPROM 1KX12 18CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C56A/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 12
• Program Memory Size: 1.5KB (1K x 12)
• Program Memory Type: EPROM, UV
• Ram Size: 25 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 18-CDIP (0.300", 7.62mm) Window
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

10.0
Each PIC16C5X instruction is a 12-bit word divided into
an OPCODE, which specifies the instruction type and
one or more operands which further specify the opera-
tion of the instruction. The PIC16C5X instruction set
summary in Table 10-2 groups the instructions into
byte-oriented, bit-oriented, and literal and control oper-
ations. Table 10-1 shows the opcode field descriptions.
For byte-oriented instructions, ’f’ represents a file reg-
ister designator and ’d’ represents a destination desig-
nator. The file register designator is used to specify
which one of the 32 file registers in that bank is to be
used by the instruction.
The destination designator specifies where the result of
the operation is to be placed. If ’d’ is ’0’, the result is
placed in the W register. If ’d’ is ’1’, the result is placed
in the file register specified in the instruction.
For bit-oriented instructions, ’b’ represents a bit field
designator which selects the number of the bit affected
by the operation, while ’f’ represents the number of the
file in which the bit is located.
For literal and control operations, ’k’ represents an
8 or 9-bit constant or literal value.
TABLE 10-1:
italics User defined term (font is courier)
label
2002 Microchip Technology Inc.
Field
dest
[
(
TOS
WDT
< >
PC
TO
PD
f
W
b
k
x
d
]
)
INSTRUCTION SET SUMMARY
Register file address (0x00 to 0x1F)
Working register (accumulator)
Bit address within an 8-bit file register
Literal field, constant data or label
Don’t care location (= 0 or 1)
The assembler will generate code with x = 0.
It is the recommended form of use for com-
patibility with all Microchip software tools.
Destination select;
Default is d = 1
Label name
Top of Stack
Program Counter
Watchdog Timer Counter
Time-out bit
Power-down bit
Destination, either the W register or the
specified register file location
Options
Contents
Assigned to
Register bit field
In the set of
d = 0 (store result in W)
d = 1 (store result in file register ’f’)
OPCODE FIELD
DESCRIPTIONS
Description
Preliminary
All instructions are executed within one single instruc-
tion cycle, unless a conditional test is true or the pro-
gram counter is changed as a result of an instruction.
In this case, the execution takes two instruction cycles.
One instruction cycle consists of four oscillator periods.
Thus, for an oscillator frequency of 4 MHz, the normal
instruction execution time would be 1 s. If a condi-
tional test is true or the program counter is changed as
a result of an instruction, the instruction execution time
would be 2 s.
Figure 10-1 shows the three general formats that the
instructions can have. All examples in the figure use
the following format to represent a hexadecimal num-
ber:
where ’h’ signifies a hexadecimal digit.
FIGURE 10-1:
Byte-oriented file register operations
Bit-oriented file register operations
Literal and control operations (except GOTO)
Literal and control operations - GOTO instruction
0xhhh
11
11
11
11
d = 0 for destination W
d = 1 for destination f
f = 5-bit file register address
b = 3-bit bit address
f = 5-bit file register address
k = 8-bit immediate value
k = 9-bit immediate value
OPCODE
OPCODE
OPCODE
OPCODE
6
8 7
GENERAL FORMAT FOR
INSTRUCTIONS
b (BIT #)
d
5
9
8
PIC16C5X
4
8
7
5 4
f (FILE #)
k (literal)
k (literal)
f (FILE #)
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