PIC12C508A-04I/P Microchip Technology, PIC12C508A-04I/P Datasheet - Page 47

• Manufacturer Part Number: PIC12C508A-04I/P
• Description: IC MCU OTP 512X12 8DIP
• Manufacturer: Microchip Technology
• Series: PIC® 12Cr

Specifications of PIC12C508A-04I/P

• Program Memory Type: OTP
• Program Memory Size: 768B (512 x 12)
• Package / Case: 8-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 5
• Ram Size: 25 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC12C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 25 B
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 5
• Number Of Timers: 1
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: DVMCPA, ICE2000
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGDVMCPA - KIT DVR BOARD EVAL SYSTEM MXDEV1DVA12XP080 - ADAPTER DEVICE FOR MPLAB-ICEAC124001 - MODULE SKT PROMATEII 8DIP/SOIC
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

9.0
Each PIC12C5XX instruction is a 12-bit word divided
into an OPCODE, which specifies the instruction type,
and one or more operands which further specify the
operation
instruction set summary in Table 9-2 groups the
instructions into byte-oriented, bit-oriented, and literal
and control operations. Table 9-1 shows the opcode
field descriptions.
For byte-oriented instructions, ’f’ represents a file
register designator and ’d’ represents a destination
designator. The file register designator is used to
specify which one of the 32 file registers 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 9-1:
label
dest
Field
i
1999 Microchip Technology Inc.
talics
TOS
WDT
< >
( )
PC
TO
PD
[ ]
f
W
b
k
x
d
INSTRUCTION SET SUMMARY
Register file address (0x00 to 0x7F)
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 compatibility
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
User defined term (font is courier)
of
d = 0 (store result in W)
d = 1 (store result in file register ’f’)
the
OPCODE FIELD
DESCRIPTIONS
instruction.
Description
The
PIC12C5XX
All instructions are executed within a single instruction
cycle, unless a conditional test is true or the program
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 is 1 s. If a conditional test is
true or the program counter is changed as a result of
an instruction, the instruction execution time is 2 s.
Figure 9-1 shows the three general formats that the
instructions can have. All examples in the figure use the
following format to represent a hexadecimal number:
where ’h’ signifies a hexadecimal digit.
FIGURE 9-1:
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
GENERAL FORMAT FOR
INSTRUCTIONS
6
8 7
b (BIT #)
PIC12C5XX
d
5
9
8
4
8
7
5 4
f (FILE #)
k (literal)
k (literal)
f (FILE #)
DS40139E-page 47
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