PIC16C642-10I/SP Microchip Technology, PIC16C642-10I/SP Datasheet - Page 9

• Manufacturer Part Number: PIC16C642-10I/SP
• Description: IC MCU OTP 4KX14 COMP 28DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C642-10I/SP

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 10MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, WDT
• Number Of I /o: 22
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: OTP
• Ram Size: 176 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 176 B
• Interface Type: RS- 232
• Maximum Clock Frequency: 10 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 8
• Operating Supply Voltage: 3 V to 6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

3.0
The
PIC16C66X devices can be attributed to a number of
architectural features commonly found in RISC micro-
processors. To begin with, the PIC16C64X &
PIC16C66X use a Harvard architecture in which pro-
gram and data are accessed from separate memories
using separate buses. This improves bandwidth over
traditional von Neumann architecture where program
and data are fetched from the same memory. Separat-
ing program and data memory further allows instruc-
tions to be sized differently than an 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 over-
laps fetch and execution of instructions. Consequently,
all instructions (35) execute in a single cycle (200 ns @
20 MHz) except for program branches, which require
two cycles.
The PIC16C641 and PIC16C661 both address 2K x 14
on-chip program memory while the PIC16C642 and
PIC16C662 address 4K x 14. All program memory is
internal.
PIC16C64X & PIC16C66X devices can directly or indi-
rectly address their register files or data memory. All
special function registers including the program
counter are mapped in the data memory. These
devices have an orthogonal (symmetrical) instruction
set that makes it possible to carry out any operation on
any register using any addressing mode. This symmet-
rical nature and lack of ‘special optimal situations’
make programming with the PIC16C64X & PIC16C66X
simple yet efficient. In addition, the learning curve is
reduced significantly.
1996 Microchip Technology Inc.
high
ARCHITECTURAL OVERVIEW
performance
of
This document was created with FrameMaker 4 0 4
the
PIC16C64X
Preliminary
PIC16C64X & PIC16C66X
&
PIC16C64X & PIC16C66X devices contain an 8-bit
ALU and working register. The ALU is a general pur-
pose arithmetic unit. It performs arithmetic and Bool-
ean 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.
DS30559A-page 9