Datasheet

© 2009 Microchip Technology Inc. DS41203E-page 5
PIC16F688
1.0 DEVICE OVERVIEW
The PIC16F688 is covered by this data sheet. It is
available in 14-pin PDIP, SOIC, TSSOP and QFN
packages. Figure 1-1 shows a block diagram of the
PIC16F688 device. Table 1-1 shows the pinout
description.
FIGURE 1-1: PIC16F688 BLOCK DIAGRAM
Flash
Program
Memory
13
Data Bus
8
14
Program
Bus
Instruction Reg
Program Counter
RAM
File
Registers
Direct Addr
7
RAM Addr
9
Addr MUX
Indirect
Addr
FSR Reg
STATUS Reg
MUX
ALU
W Reg
Instruction
Decode &
Control
Timing
Generation
OSC1/CLKIN
OSC2/CLKOUT
PORTA
8
8
8
3
8-Level Stack
256 bytes
4k x 14
(13 bit)
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
MCLR
VSS
Brown-out
Reset
2
Timer0 Timer1
DATA
EEPROM
256 bytes
EEDAT
EEADDR
RA0
RA1
RA2
RA3
RA4
RA5
Analog Comparators
Analog-to-Digital Converter
AN0 AN1 AN2 AN3
C1IN- C1IN+ C1OUT
T0CKI
INT
T1CKI
Configuration
Internal
Oscillator
VREF
and Reference
T1G
PORTC
RC0
RC1
RC2
RC3
RC4
RC5
AN4 AN5 AN6 AN7
V
DD
8
C2IN- C2IN+ C2OUT
EUSART
Block
RX/DT TX/CK