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PDF PIC16C621A Data sheet ( Hoja de datos )
| Número de pieza | PIC16C621A | |
| Descripción | EPROM-Based 8-Bit CMOS Microcontroller | |
| Fabricantes | Microchip Technology | |
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PIC16C62X
EPROM-Based 8-Bit CMOS Microcontroller
Devices included in this data sheet:
Referred to collectively as PIC16C62X .
• PIC16C620
• PIC16C621
• PIC16C622
• PIC16CR620A
• PIC16C620A
• PIC16C621A
• PIC16C622A
High Performance RISC CPU:
• Only 35 instructions to learn
• All single-cycle instructions (200 ns), except for
program branches which are two-cycle
• Operating speed:
- DC - 20 MHz clock input
- DC - 200 ns instruction cycle
Device
Program
Memory
Data
Memory
PIC16C620
512 80
PIC16C620A
512 96
PIC16CR620A
512 96
PIC16C621
1K 80
PIC16C621A
1K 96
PIC16C622
2K 128
PIC16C622A
2K 128
• Interrupt capability
• 16 special function hardware registers
• 8-level deep hardware stack
• Direct, Indirect and Relative addressing modes
Peripheral Features:
• 13 I/O pins with individual direction control
• High current sink/source for direct LED drive
• Analog comparator module with:
- Two analog comparators
- Programmable on-chip voltage reference
(VREF) module
- Programmable input multiplexing from device
inputs and internal voltage reference
- Comparator outputs can be output signals
• Timer0: 8-bit timer/counter with 8-bit
programmable prescaler
Special Microcontroller Features:
• Power-on Reset (POR)
• Power-up Timer (PWRT) and Oscillator Start-up
Timer (OST)
• Brown-out Reset
• Watchdog Timer (WDT) with its own on-chip RC
oscillator for reliable operation
Pin Diagrams
PDIP, SOIC, Windowed CERDIP
RA2/AN2/VREF
RA3/AN3
RA4/T0CKI
MCLR/VPP
VSS
RB0/INT
RB1
RB2
RB3
•1 18
2 17
3 16
4 15
5 14
6 13
7 12
8 11
9 10
RA1/AN1
RA0/AN0
OSC1/CLKIN
OSC2/CLKOUT
VDD
RB7
RB6
RB5
RB4
SSOP
RA2/AN2/VREF
RA3/AN3
RA4/T0CKI
MCLR/VPP
VSS
VSS
RB0/INT
RB1
RB2
RB3
•1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
RA1/AN1
RA0/AN0
OSC1/CLKIN
OSC2/CLKOUT
VDD
VDD
RB7
RB6
RB5
RB4
Special Microcontroller Features (cont’d)
• Programmable code protection
• Power saving SLEEP mode
• Selectable oscillator options
• Serial in-circuit programming (via two pins)
• Four user programmable ID locations
CMOS Technology:
• Low-power, high-speed CMOS EPROM technol-
ogy
• Fully static design
• Wide operating voltage range
- PIC16C62X - 2.5V to 6.0V
- PIC16C62XA - 2.5V to 5.5V
- PIC16CR620A - 2.0V to 5.5V
• Commercial, industrial and extended tempera-
ture range
• Low power consumption
- < 2.0 mA @ 5.0V, 4.0 MHz
- 15 µA typical @ 3.0V, 32 kHz
- < 1.0 µA typical standby current @ 3.0V
© 1998 Microchip Technology Inc.
Preliminary
DS30235G-page 1
1 page  
1.0 GENERAL DESCRIPTION
The PIC16C62X are 18 and 20 Pin
ROM/EPROM-based members of the versatile PICmi-
cro™ family of low-cost, high-performance, CMOS,
fully-static, 8-bit microcontrollers.
All PICmicro™ microcontrollers employ an advanced
RISC architecture. The PIC16C62X have enhanced
core features, eight-level deep stack, and multiple inter-
nal 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.
PIC16C62X microcontrollers typically achieve a 2:1
code compression and a 4:1 speed improvement over
other 8-bit microcontrollers in their class.
The PIC16C620A, PIC16C621A and PIC16CR620A
have 96 bytes of RAM. The PIC16C622(A) has 128
bytes of RAM. Each device has 13 I/O pins and an 8-bit
timer/counter with an 8-bit programmable prescaler. In
addition, the PIC16C62X adds two analog comparators
with a programmable on-chip voltage reference mod-
ule. The comparator module is ideally suited for appli-
cations requiring a low-cost analog interface (e.g.,
battery chargers, threshold detectors, white goods
controllers, etc).
PIC16C62X devices have special features to reduce
external components, thus reducing system cost,
enhancing system reliability and reducing power con-
sumption. There are four oscillator options, of which the
single pin RC oscillator provides a low-cost solution,
the LP oscillator minimizes power consumption, XT is a
standard crystal, and the HS is for High Speed crystals.
The SLEEP (power-down) mode offers power savings.
The user can wake up the chip from SLEEP through
several external and internal interrupts and reset.
PIC16C62X
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.
Table 1-1 shows the features of the PIC16C62X
mid-range microcontroller families.
A simplified block diagram of the PIC16C62X is shown
in Figure 3-1.
The PIC16C62X series fit perfectly in applications
ranging from battery chargers to low-power remote
sensors. The EPROM technology makes customization
of application programs (detection levels, pulse gener-
ation, timers, 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 PIC16C62X very versatile.
1.1 Family and Upward Compatibility
Those users familiar with the PIC16C5X family of
microcontrollers 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
PIC16C62X family of devices (Appendix B). The
PIC16C62X family fills the niche for users wanting to
migrate up from the PIC16C5X family and not needing
various peripheral features of other members of the
PIC16XX mid-range microcontroller family.
1.2 Development Support
The PIC16C62X family is supported by a full-featured
macro assembler, a software simulator, an in-circuit
emulator, a low-cost development programmer and a
full-featured programmer. A “C” compiler and fuzzy
logic support tools are also available.
© 1998 Microchip Technology Inc.
Preliminary
DS30235G-page 5
5 Page 
PIC16C62X
TABLE 3-1: PIC16C62X PINOUT DESCRIPTION
Name
DIP/
SOIC
Pin #
SSOP
Pin #
I/O/P
Type
Buffer
Type
Description
OSC1/CLKIN
OSC2/CLKOUT
MCLR/VPP
16 18
15 17
44
I ST/CMOS Oscillator crystal input/external clock source input.
O — Oscillator crystal output. Connects to crystal or resonator
in crystal oscillator mode. In RC mode, OSC2 pin outputs
CLKOUT which has 1/4 the frequency of OSC1, and
denotes the instruction cycle rate.
I/P ST Master clear (reset) input/programming voltage input.
This pin is an active low reset to the device.
PORTA is a bi-directional I/O port.
RA0/AN0
17 19
I/O
ST
Analog comparator input
RA1/AN1
RA2/AN2/VREF
RA3/AN3
RA4/T0CKI
18 20
11
22
33
I/O
I/O
I/O
I/O
ST Analog comparator input
ST Analog comparator input or VREF output
ST Analog comparator input /output
ST Can be selected to be the clock input to the Timer0
timer/counter or a comparator output. Output is open
drain type.
PORTB is a bi-directional I/O port. PORTB can be
software programmed for internal weak pull-up on all
inputs.
RB0/INT
RB1
6
7
I/O TTL/ST(1)
RB0/INT can also be selected as an external
interrupt pin.
78
I/O TTL
RB2
89
I/O TTL
RB3 9 10 I/O TTL
RB4
10 11 I/O TTL
Interrupt on change pin.
RB5
11 12 I/O TTL
Interrupt on change pin.
RB6
12 13
I/O TTL/ST(2)
Interrupt on change pin. Serial programming clock.
RB7
13 14
I/O TTL/ST(2)
Interrupt on change pin. Serial programming data.
VSS
5 5,6
P
— Ground reference for logic and I/O pins.
VDD
14 15,16
P
— Positive supply for logic and I/O pins.
Legend:
O = output
I/O = input/output P = power
— = Not used
I = Input
ST = Schmitt Trigger input
TTL = TTL input
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
Note 2: This buffer is a Schmitt Trigger input when used in serial programming mode.
© 1998 Microchip Technology Inc.
Preliminary
DS30235G-page 11
11 Page | ||
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