PIC18F2455-I/SP Microchip Technology Inc., PIC18F2455-I/SP Datasheet - Page 77

• Manufacturer Part Number: PIC18F2455-I/SP
• Description: Microcontroller; 24 KB Flash; 2048 RAM; 256 EEPROM; 24 I/O; 28-Pin-SPDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2455-I/SP

• A/d Inputs: 10-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 23
• Interface: I2C/SPI/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 24K Bytes
• Ram Size: 2K Bytes
• Speed: 48 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

REGISTER 6-1:
© 2006 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Note 1:
U-0
—
When a WRERR occurs, the CFGS bit is not cleared. This allows tracing of the error condition.
Unimplemented: Read as ‘0’
CFGS: Flash Program or Configuration Select bit
1 = Access Configuration registers
0 = Access Flash program
Unimplemented: Read as ‘0’
FREE: Flash Row Erase Enable bit
1 = Erase the program memory row addressed by TBLPTR on the next WR command
0 = Perform write-only
WRERR: Flash Program Error Flag bit
1 = A write operation is prematurely terminated (any Reset during self-timed programming in normal
0 = The write operation completed
WREN: Flash Program Write Enable bit
1 = Allows write cycles to Flash program
0 = Inhibits write cycles to Flash program
WR: Write Control bit
1 = Initiates a program memory erase cycle or write cycle
0 = Write cycle complete
Unimplemented: Read as ‘0’
R/W-x
CFGS
(cleared by completion of erase operation)
operation or an improper write attempt)
(The operation is self-timed and the bit is cleared by hardware once write is complete.
The WR bit can only be set (not cleared) in software.)
EECON1: MEMORY CONTROL REGISTER 1
W = Writable bit
‘1’ = Bit is set
U-0
—
Advance Information
R/W-0
FREE
(1)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
WRERR
R/W-x
(1)
PIC18F2450/4450
WREN
R/W-0
x = Bit is unknown
R/S-0
WR
DS39760A-page 75
U-0
—
bit 0