PIC16F628-20E/SO Microchip Technology, PIC16F628-20E/SO Datasheet - Page 39

• Manufacturer Part Number: PIC16F628-20E/SO
• Description: IC MCU FLASH 2KX14 18-SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F628-20E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 224 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

FIGURE 5-12:
Note 1: The low voltage programming disables the interrupt-on-change and the weak pull-ups on RB4.
 2003 Microchip Technology Inc.
Set RBIF
RBPU
Data Bus
WR PORTB
WR TRISB
RD TRISB
LVP
RD PORTB
PGM input
BLOCK DIAGRAM OF RB4/PGM PIN
From other
RB<7:4> pins
TRIS Latch
Data Latch
D
D
CK
CK
Q
Q
Q
Q
Preliminary
Schmitt
Trigger
Q
Q
EN
EN
D
D
TTL
input
buffer
PIC16F62X
V
P
DD
weak pull-up
V
Q1
Q3
DS40300C-page 37
V
DD
SS
RB4/PGM