PIC16F721-I/SO Microchip Technology, PIC16F721-I/SO Datasheet - Page 164

• Manufacturer Part Number: PIC16F721-I/SO
• Description: MCU PIC 4K FLASH 20-SOIC
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F721-I/SO

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Number Of I /o: 17
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Controller Family/series: PIC16F
• No. Of I/o's: 18
• Ram Memory Size: 256Byte
• Cpu Speed: 16MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC16F/LF720/721
Since data is being written to buffer registers, the
writing of the first 31 words of the block appears to
occur immediately. The processor will halt internal
operations for the typical 4ms, only during the cycle in
which the erase takes place (i.e., the last word of the
32-word block erase). This is not Sleep mode as the
clocks and peripherals will continue to run. After the 32-
word write cycle, the processor will resume operation
with the third instruction after the PMCON1 write
instruction.
FIGURE 18-2:
An example of the complete 32-word write sequence is
shown in
into the PMADRH:PMADRL register pair; the 32 words
of data are loaded using indirect addressing.
DS41430A-page 164
PMADRL<4:0> = 00000
Example
Buffer Register
18-2. The initial address is loaded
BLOCK OF 32 WRITES TO FLASH PROGRAM MEMORY
14
PMADRL<4:0> = 00001
7
Buffer Register
5
PMDATH
14
6
Program Memory
PMADRL<4:0> = 00010
0 7
PMDATL
Buffer Register
8
14
PMADRL<4:0> = 11111
0
 2010 Microchip Technology Inc.
Buffer Register
14