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PDF 16C74A Data sheet ( Hoja de datos )

Número de pieza 16C74A
Descripción PIC16C74A
Fabricantes Microchip Technology 
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PIC16C7X
8-Bit CMOS Microcontrollers with A/D Converter
Devices included in this data sheet:
• PIC16C72
• PIC16C73
• PIC16C73A
• PIC16C74
• PIC16C74A
• PIC16C76
• PIC16C77
PIC16C7X Microcontroller Core Features:
• High-performance RISC CPU
• Only 35 single word instructions to learn
• All single cycle instructions except for program
branches which are two cycle
• Operating speed: DC - 20 MHz clock input
DC - 200 ns instruction cycle
• Up to 8K x 14 words of Program Memory,
up to 368 x 8 bytes of Data Memory (RAM)
• Interrupt capability
• Eight level deep hardware stack
• Direct, indirect, and relative addressing modes
• Power-on Reset (POR)
• Power-up Timer (PWRT) and
Oscillator Start-up Timer (OST)
• Watchdog Timer (WDT) with its own on-chip RC
oscillator for reliable operation
• Programmable code-protection
• Power saving SLEEP mode
• Selectable oscillator options
• Low-power, high-speed CMOS EPROM
technology
• Fully static design
PIC16C7X Features
Program Memory (EPROM) x 14
Data Memory (Bytes) x 8
I/O Pins
Parallel Slave Port
Capture/Compare/PWM Modules
Timer Modules
A/D Channels
Serial Communication
In-Circuit Serial Programming
Brown-out Reset
Interrupt Sources
72
2K
128
22
1
3
5
SPI/I2C
Yes
Yes
8
73
4K
192
22
2
3
5
SPI/I2C,
USART
Yes
11
• Wide operating voltage range: 2.5V to 6.0V
• High Sink/Source Current 25/25 mA
• Commercial, Industrial and Extended temperature
ranges
• Low-power consumption:
< 2 mA @ 5V, 4 MHz
15 µA typical @ 3V, 32 kHz
< 1 µA typical standby current
PIC16C7X Peripheral Features:
• Timer0: 8-bit timer/counter with 8-bit prescaler
• Timer1: 16-bit timer/counter with prescaler,
can be incremented during sleep via external
crystal/clock
• Timer2: 8-bit timer/counter with 8-bit period
register, prescaler and postscaler
• Capture, Compare, PWM module(s)
• Capture is 16-bit, max. resolution is 12.5 ns,
Compare is 16-bit, max. resolution is 200 ns,
PWM max. resolution is 10-bit
• 8-bit multichannel analog-to-digital converter
• Synchronous Serial Port (SSP) with
SPIand I2C
• Universal Synchronous Asynchronous Receiver
Transmitter (USART/SCI)
• Parallel Slave Port (PSP) 8-bits wide, with
external RD, WR and CS controls
• Brown-out detection circuitry for
Brown-out Reset (BOR)
73A
4K
192
22
2
3
5
SPI/I2C,
USART
Yes
Yes
11
74
4K
192
33
Yes
2
3
8
SPI/I2C,
USART
Yes
12
74A
4K
192
33
Yes
2
3
8
SPI/I2C,
USART
Yes
Yes
12
76
8K
368
22
2
3
5
SPI/I2C,
USART
Yes
Yes
11
77
8K
368
33
Yes
2
3
8
SPI/I2C,
USART
Yes
Yes
12
© 1997 Microchip Technology Inc.
DS30390E-page 1

1 page




16C74A pdf
1.0 GENERAL DESCRIPTION
The PIC16C7X is a family of low-cost, high-perfor-
mance, CMOS, fully-static, 8-bit microcontrollers with
integrated analog-to-digital (A/D) converters, in the
PIC16CXX mid-range family.
All PIC16/17 microcontrollers employ an advanced
RISC architecture. The PIC16CXX microcontroller fam-
ily has enhanced core features, eight-level deep stack,
and multiple internal and external interrupt sources.
The separate instruction and data buses of the Harvard
architecture allow a 14-bit wide instruction word with
the separate 8-bit wide data. The two stage instruction
pipeline allows all instructions to execute in a single
cycle, except for program branches which require two
cycles. A total of 35 instructions (reduced instruction
set) are available. Additionally, a large register set gives
some of the architectural innovations used to achieve a
very high performance.
PIC16CXX microcontrollers typically achieve a 2:1
code compression and a 4:1 speed improvement over
other 8-bit microcontrollers in their class.
The PIC16C72 has 128 bytes of RAM and 22 I/O pins.
In addition several peripheral features are available
including: three timer/counters, one Capture/Compare/
PWM module and one serial port. The Synchronous
Serial Port can be configured as either a 3-wire Serial
Peripheral Interface (SPI) or the two-wire Inter-Inte-
grated Circuit (I2C) bus. Also a 5-channel high-speed
8-bit A/D is provided. The 8-bit resolution is ideally
suited for applications requiring low-cost analog inter-
face, e.g. thermostat control, pressure sensing, etc.
The PIC16C73/73A devices have 192 bytes of RAM,
while the PIC16C76 has 368 byes of RAM. Each device
has 22 I/O pins. In addition, several peripheral features
are available including: three timer/counters, two Cap-
ture/Compare/PWM modules and two serial ports. The
Synchronous Serial Port can be configured as either a
3-wire Serial Peripheral Interface (SPI) or the two-wire
Inter-Integrated Circuit (I2C) bus. The Universal Syn-
chronous Asynchronous Receiver Transmitter
(USART) is also known as the Serial Communications
Interface or SCI. Also a 5-channel high-speed 8-bit A/
D is provided.The 8-bit resolution is ideally suited for
applications requiring low-cost analog interface, e.g.
thermostat control, pressure sensing, etc.
The PIC16C74/74A devices have 192 bytes of RAM,
while the PIC16C77 has 368 bytes of RAM. Each
device has 33 I/O pins. In addition several peripheral
features are available including: three timer/counters,
two Capture/Compare/PWM modules and two serial
ports. The Synchronous Serial Port can be configured
as either a 3-wire Serial Peripheral Interface (SPI) or
the two-wire Inter-Integrated Circuit (I2C) bus. The Uni-
versal Synchronous Asynchronous Receiver Transmit-
ter (USART) is also known as the Serial
Communications Interface or SCI. An 8-bit Parallel
Slave Port is provided. Also an 8-channel high-speed
PIC16C7X
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8-bit A/D is provided. The 8-bit resolution is ideally
suited for applications requiring low-cost analog inter-
face, e.g. thermostat control, pressure sensing, etc.
The PIC16C7X family has special features to reduce
external components, thus reducing cost, enhancing
system reliability and reducing power consumption.
There are four oscillator options, of which the single pin
RC oscillator provides a low-cost solution, the LP oscil-
lator minimizes power consumption, XT is a standard
crystal, and the HS is for High Speed crystals. The
SLEEP (power-down) feature provides a power saving
mode. The user can wake up the chip from SLEEP
through several external and internal interrupts and
resets.
A highly reliable Watchdog Timer with its own on-chip
RC oscillator provides protection against software lock-
up.
A UV erasable CERDIP packaged version is ideal for
code development while the cost-effective One-Time-
Programmable (OTP) version is suitable for production
in any volume.
The PIC16C7X family fits perfectly in applications rang-
ing from security and remote sensors to appliance con-
trol and automotive. The EPROM technology makes
customization of application programs (transmitter
codes, motor speeds, receiver frequencies, etc.)
extremely fast and convenient. The small footprint
packages make this microcontroller series perfect for
all applications with space limitations. Low cost, low
power, high performance, ease of use and I/O flexibility
make the PIC16C7X very versatile even in areas where
no microcontroller use has been considered before
(e.g. timer functions, serial communication, capture
and compare, PWM functions and coprocessor appli-
cations).
1.1 Family and Upward Compatibility
Users familiar with the PIC16C5X microcontroller fam-
ily will realize that this is an enhanced version of the
PIC16C5X architecture. Please refer to Appendix A for
a detailed list of enhancements. Code written for the
PIC16C5X can be easily ported to the PIC16CXX fam-
ily of devices (Appendix B).
1.2 Development Support
PIC16C7X devices are supported by the complete line
of Microchip Development tools.
Please refer to Section 16.0 for more details about
Microchip’s development tools.
© 1997 Microchip Technology Inc.
DS30390E-page 5

5 Page





16C74A arduino
FIGURE 3-2: PIC16C73/73A/76 BLOCK DIAGRAM
Device Program Memory Data Memory (RAM)
PIC16C73
PIC16C73A
PIC16C76
4K x 14
4K x 14
8K x 14
192 x 8
192 x 8
368 x 8
EPROM
Program
Memory
Program
Bus
14
Instruction reg
13
Program Counter
Data Bus
8
8 Level Stack
(13-bit)
RAM
File
Registers
RAM Addr(1)
9
Addr MUX
Direct Addr 7
Indirect
8 Addr
FSR reg
STATUS reg
8
Instruction
Decode &
Control
OSC1/CLKIN
OSC2/CLKOUT
Timing
Generation
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Brown-out
Reset(2)
3
MUX
ALU
8
W reg
PIC16C7X
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PORTA
PORTB
PORTC
RA0/AN0
RA1/AN1
RA2/AN2
RA3/AN3/VREF
RA4/T0CKI
RA5/SS/AN4
RB0/INT
RB7:RB1
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
Timer0
MCLR VDD, VSS
Timer1
Timer2
A/D
CCP1
CCP2
Synchronous
Serial Port
USART
Note 1: Higher order bits are from the STATUS register.
2: Brown-out Reset is not available on the PIC16C73.
© 1997 Microchip Technology Inc.
DS30390E-page 11

11 Page







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