PIC12F639 Microchip Technology, PIC12F639 Datasheet - Page 7
PIC12F639
Manufacturer Part Number
PIC12F639
Description
(PIC12F635 / PIC12F636 / PIC12F639) 8/14-PIN FLASH-BASED / 8-BIT CMOS MICROCONTROLLERS WITH NANOWATT TECHNOLOGY
Manufacturer
Microchip Technology
Datasheet
1.PIC12F639.pdf
(196 pages)
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This document contains device specific information for
the PIC12F635/PIC16F636/639 devices. Additional
information may be found in the “PICmicro
MCU Family Reference Manual” (DS33023), which may
be
Representative or downloaded from the Microchip web
site. The reference manual should be considered a
complementary document to this data sheet and is
highly recommended reading for a better understanding
of the device architecture and operation of the peripheral
modules.
FIGURE 1-1:
© 2005 Microchip Technology Inc.
T1CKI
T0CKI
OSC2/CLKOUT
T1G
OSC1/CLKIN
obtained
DEVICE OVERVIEW
Program
Cryptographic
Oscillator
Internal
Bus
8 MHz
Timer0
Module
Generation
from
Timing
Instruction reg
Decode and
Configuration
Instruction
Control
14
Program
1K x 14
Memory
Flash
Oscillator
Internal
31 kHz
PIC12F635 BLOCK DIAGRAM
your
local
8
13
Timer1
MCLR V
C1IN- C1IN+ C1OUT
Low-Voltage Detect
Direct Addr
Programmable
Start-up Timer
and Reference
Program Counter
Microchip
Comparator
Brown-out
Watchdog
Power-up
Power-on
Oscillator
Wake-up
8-level Stack
1 Analog
Detect
Timer
Reset
Timer
Reset
(13-bit)
DD
®
Mid-Range
V
SS
7
Sales
PIC12F635/PIC16F636/639
RAM Addr
Preliminary
8
3
Data Bus
Addr MUX
Registers
64 bytes
W reg
ALU
RAM
File
Status reg
8
FSR reg
The PIC12F635/PIC16F636/639 devices are covered
by this data sheet. Figure 1-1 shows a block diagram of
the PIC12F635/PIC16F636/639 devices. Table 1-1
shows the pinout description.
MUX
9
128 bytes
EEPROM
EEADDR
Indirect
EEDAT
Data
Addr
8
GPIO
GP0/C1IN+/ICSPDAT/ULPWU
GP1/C1IN-/ICSPCLK
GP2/T0CKI/INT/C1OUT
GP3/MCLR/V
GP4/T1G/OSC2/CLKOUT
GP5/T1CKI/OSC1/CLKIN
DS41232B-page 5
PP
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