PIC16F628-04I/P Microchip Technology Inc., PIC16F628-04I/P Datasheet - Page 39

• Manufacturer Part Number: PIC16F628-04I/P
• Description: 18 PIN, 3.5 KB FLASH, 224 RAM, 16 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F628-04I/P

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 128 Bytes
• Input Output: 16
• Interface: SCI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 18-pin PDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 224 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

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