PIC16C622A-20I/P Microchip Technology, PIC16C622A-20I/P Datasheet - Page 11

• Manufacturer Part Number: PIC16C622A-20I/P
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,DIP,18PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C622A-20I/P

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 13
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 18-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGDVA16XP180 - ADAPTER DEVICE FOR MPLAB-ICEAC164010 - MODULE SKT PROMATEII DIP/SOIC
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.0
The high performance of the PIC16C62X family can be
attributed to a number of architectural features
commonly found in RISC microprocessors. To begin
with, the PIC16C62X uses a Harvard architecture, in
which, program and data are accessed from separate
memories using separate busses. This improves
bandwidth over traditional von Neumann architecture,
where program and data are fetched from the same
memory. Separating program and data memory further
allows instructions to be sized differently than 8-bit
wide data word. Instruction opcodes are 14-bits wide
making it possible to have all single word instructions.
A 14-bit wide program memory access bus fetches a
14-bit instruction in a single cycle. A two-stage pipeline
overlaps
Consequently, all instructions (35) execute in a single
cycle (200 ns @ 20 MHz) except for program branches.
The PIC16C620(A) and PIC16CR620A address
512 x 14 on-chip program memory. The PIC16C621(A)
addresses
PIC16C622(A) addresses 2K x 14 program memory.
All program memory is internal.
The PIC16C62X can directly or indirectly address its
register files or data memory. All special function
registers including the program counter are mapped in
the data memory. The PIC16C62X has an orthogonal
(symmetrical) instruction set that makes it possible to
carry out any operation on any register using any
Addressing mode. This symmetrical nature and lack of
‘special optimal situations’ make programming with the
PIC16C62X simple yet efficient. In addition, the
learning curve is reduced significantly.
 2003 Microchip Technology Inc.
ARCHITECTURAL OVERVIEW
fetch
1K x 14
and
execution
program
of
memory.
instructions.
The
The PIC16C62X devices contain an 8-bit ALU and
working register. The ALU is a general purpose
arithmetic unit. It performs arithmetic and Boolean
functions between data in the working register and any
register file.
The ALU is 8-bits wide and capable of addition,
subtraction, shift and logical operations. Unless
otherwise mentioned, arithmetic operations are two's
complement in nature. In two-operand instructions,
typically one operand is the working register
(W register). The other operand is a file register or an
immediate constant. In single operand instructions, the
operand is either the W register or a file register.
The W register is an 8-bit working register used for ALU
operations. It is not an addressable register.
Depending on the instruction executed, the ALU may
affect the values of the Carry (C), Digit Carry (DC), and
Zero (Z) bits in the STATUS register. The C and DC bits
operate as a Borrow and Digit Borrow out bit,
respectively, bit in subtraction. See the SUBLW and
SUBWF instructions for examples.
A simplified block diagram is shown in Figure 3-1, with
a description of the device pins in Table 3-1.
PIC16C62X
DS30235J-page 9