PIC16LF1903T-I/SO Microchip Technology, PIC16LF1903T-I/SO Datasheet - Page 87

• Manufacturer Part Number: PIC16LF1903T-I/SO
• Description: 7KB Flash, 256B RAM, LCD, 11x10b ADC, NanoWatt XLP 28 SOIC .300in T/R
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16LF1903T-I/SO

• Processor Series: PIC16LF190x
• Core: PIC
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 4 KB
• Data Ram Size: 256 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 25
• Number Of Timers: 2
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-28
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: -
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 25
• Eeprom Size: -
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / Rohs Status: Details

FIGURE 10-6:
 2011 Microchip Technology Inc.
The number of words cannot
to be written into Program or
exceed the number of words
Determine number of words
Program or Config. Memory
Load Write Latches Only
Configuration Memory.
Select Write Operation
(PMADRH:PMADRL)
Select Row Address
Disable Interrupts
Write Operation
(LWLO = 1)
(FREE = 0)
(word_cnt)
(GIE = 0)
per row.
(CFGS)
Select
Start
FLASH PROGRAM MEMORY WRITE FLOWCHART
Preliminary
Program Memory Latches
Update the word counter
No delay when writing to
(PMADRH:PMADRL++)
Operation (WREN = 1)
Load the value to write
(PMDATH:PMDATL)
Enable Write/Erase
Increment Address
Unlock Sequence
Last word to
Figure 10-3
(word_cnt--)
(Figure x-x)
write ?
No
Yes
PIC16LF1902/3
Write Latches to Flash
CPU stalls while Write
Write/Erase Operation
Re-enable Interrupts
operation completes
Unlock Sequence
Erase Operation
(2 ms typical)
Figure 10-3
(WREN = 0)
(LWLO = 0)
(Figure x-x)
(GIE = 1)
Disable
End
DS41455B-page 87