PIC12C671-04I/P Microchip Technology Inc., PIC12C671-04I/P Datasheet - Page 70
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PIC12C671-04I/P
Manufacturer Part Number
PIC12C671-04I/P
Description
8 PIN, 1.75 KB OTP, 128 RAM, 6 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC12C671-04IP.pdf
(129 pages)
Specifications of PIC12C671-04I/P
A/d Inputs
4-Channel, 8-Bit
Cpu Speed
2.5 MIPS
Eeprom Memory
0 Bytes
Input Output
5
Memory Type
OTP
Number Of Bits
8
Package Type
8-pin PDIP
Programmable Memory
1.75K Bytes
Ram Size
128 Bytes
Speed
4 MHz
Timers
1-8-bit
Voltage, Range
2.5-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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PIC12C67X
10.1
The PIC12C67X’s orthogonal instruction set allows
read and write of all file registers, including special
function registers. There are some special situations
the user should be aware of:
10.1.1
If an instruction writes to STATUS, the Z, C and DC bits
may be set or cleared as a result of the instruction and
overwrite the original data bits written. For example,
executing CLRF STATUS will clear register STATUS,
and then set the Z bit leaving 0000 0100b in the reg-
ister.
10.1.2
Bit 3 of the TRIS register always reads as a '1' since
GP3 is an input only pin. This fact can affect some read-
modify-write operations on the TRIS register.
DS30561B-page 70
Special Function Registers as
Source/Destination
STATUS AS DESTINATION
TRIS AS DESTINATION
10.1.3
Read, write or read-modify-write on PCL may have the
following results:
Read PC:
Write PCL:
Read-Modify-Write:
Where PCH = program counter high byte (not an
addressable register), PCLATH = Program counter
high holding latch, dest = destination, WREG or f.
10.1.4
All bit manipulation instructions are done by first read-
ing the entire register, operating on the selected bit and
writing the result back (read-modify-write). The user
should keep this in mind when operating on special
function registers, such as ports.
PCL AS SOURCE OR DESTINATION
BIT MANIPULATION
PCL
PCLATH
8-bit destination value
PCL
PCLATH
8-bit result
1999 Microchip Technology Inc.
ALU operand
dest
PCH;
PCH;
PCL
PCL
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