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PDF P12C508 Data sheet ( Hoja de datos )
| Número de pieza | P12C508 | |
| Descripción | 8-Pin / 8-Bit CMOS Microcontroller | |
| Fabricantes | Microchip Technology | |
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PIC12C5XX
8-Pin, 8-Bit CMOS Microcontroller
Devices included in this Data Sheet:
PIC12C508 and PIC12C509 are 8-bit microcontrollers
packaged in 8-lead packages. They are based on the
Enhanced PIC16C5X family.
High-Performance RISC CPU:
• Only 33 single word instructions to learn
• All instructions are single cycle (1 µs) except for
program branches which are two-cycle
• Operating speed: DC - 4 MHz clock input
DC - 1 µs instruction cycle
Device
EPROM RAM
PIC12C508
512 x 12
25
PIC12C509
1024 x 12
41
• 12-bit wide instructions
• 8-bit wide data path
• Seven special function hardware registers
• Two-level deep hardware stack
• Direct, indirect and relative addressing modes for
data and instructions
• Internal 4 MHz RC oscillator with programmable
calibration
• In-circuit serial programming
Peripheral Features:
• 8-bit real time clock/counter (TMR0) with 8-bit
programmable prescaler
• Power-On Reset (POR)
• Device Reset Timer (DRT)
• Watchdog Timer (WDT) with its own on-chip RC
oscillator for reliable operation
• Programmable code-protection
• Power saving SLEEP mode
• Wake-up from SLEEP on pin change
• Internal pull-ups on I/O pins
• Selectable oscillator options:
- INTRC: Internal 4 MHz RC oscillator
- EXTRC: External low-cost RC oscillator
- XT:
Standard crystal/resonator
- LP: Power saving, low frequency crystal
• Internal pull-up on MCLR pin
CMOS Technology:
• Low power, high speed CMOS EPROM
technology
• Fully static design
• Wide operating voltage range:
- Commercial: 2.5V to 5.5V
- Industrial: 2.5V to 5.5V
• Low power consumption
- < 2 mA @ 5V, 4 MHz
- 15 µA typical @ 3V, 32 KHz
- < 1 µA typical standby current
Pin Diagram
PDIP, SOIC
VDD
GP5/OSC1/CLKIN
GP4/OSC2
GP3/MCLR/VPP
1
2
3
4
8 VSS
7 GP0
6 GP1
5 GP2/T0CKI
© 1996 Microchip Technology Inc.
Advance Information
This document was created with FrameMaker 4 0 4
DS40139A-page 1
1 page  
2.0 PIC12C5XX DEVICE VARIETIES
A variety of packaging options are available.
Depending on application and production
requirements, the proper device option can be
selected using the information in this section. When
placing orders, please use the PIC12C5XX Product
Identification System at the back of this data sheet to
specify the correct part number.
PIC12C5XX
2.1 One-Time-Programmable (OTP)
Devices
The availability of OTP devices is especially useful for
customers expecting frequent code changes and
updates.
The OTP devices, packaged in plastic packages,
permit the user to program them once. In addition to
the program memory, the configuration bits must be
programmed.
© 1996 Microchip Technology Inc.
Advance Information
DS40139A-page 5
5 Page 
4.0 MEMORY ORGANIZATION
PIC12C5XX memory is organized into program mem-
ory and data memory. For devices with more than 512
bytes of program memory, a paging scheme is used.
Program memory pages are accessed using one STA-
TUS register bit. For the PIC12C509 with a data mem-
ory register file of more than 32 registers, a banking
scheme is used. Data memory banks are accessed
using the File Select Register (FSR).
4.1 Program Memory Organization
The PIC12C508 and PIC12C509 each have a 12-bit
Program Counter (PC) capable of addressing a 2K x
12 program memory space.
Only the first 512 x 12 (0000h-01FFh) for the
PIC12C508 and 1K x 12 (0000h-03FFh) for the
PIC12C509 are physically implemented. Refer to
Figure 4-1. Accessing a location above these
boundaries will cause a wrap-around within the first
512 x 12 space (PIC12C508) or 1K x 12 space
(PIC12C509). The reset vector is at 0000h. Location
01FFh (PIC12C508) or location 03FFh (PIC12C509)
contains the internal clock oscillator calibration value.
This value should never be overwritten.
PIC12C5XX
FIGURE 4-1:
PROGRAM MEMORY MAP
AND STACK FOR THE
PIC12C5XX
CALL, RETLW
PC<11:0>
12
Stack Level 1
Stack Level 2
Reset Vector (note 1)
0000h
On-chip Program
Memory
512 Word (PIC12C508)
On-chip Program
Memory
01FFh
0200h
1024 Word (PIC12C509) 03FFh
0400h
7FFh
Note 1: Address 0000h becomes the effec-
tive reset vector. Location 01FFh
(PIC12C508) or location 03FFh
(PIC12C509) contains the MOVLW
XX clock calibration value.
© 1996 Microchip Technology Inc.
Advance Information
DS40139A-page 11
11 Page | ||
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| PDF Descargar | [ Datasheet P12C508.PDF ] | |
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