PIC18F1220 MICROCHIP [Microchip Technology], PIC18F1220 Datasheet - Page 177

• Manufacturer Part Number: PIC18F1220
• Description: 18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

REGISTER 19-4:
REGISTER 19-5:
 2004 Microchip Technology Inc.
bit 7
bit 6-0
bit 7
bit 6-3
bit 2
bit 1
bit 0
CONFIG3H: CONFIGURATION REGISTER 3 HIGH (BYTE ADDRESS 300005h)
CONFIG4L: CONFIGURATION REGISTER 4 LOW (BYTE ADDRESS 300006h)
MCLRE: MCLR Pin Enable bit
1 = MCLR pin enabled, RA5 input pin disabled
0 = RA5 input pin enabled, MCLR disabled
Unimplemented: Read as ‘0’
bit 7
DEBUG: Background Debugger Enable bit (see note)
1 = Background debugger disabled, RB6 and RB7 configured as general purpose I/O pins
0 = Background debugger enabled, RB6 and RB7 are dedicated to In-Circuit Debug
Unimplemented: Read as ‘0’
LVP: Low-Voltage ICSP Enable bit
1 = Low-Voltage ICSP enabled
0 = Low-Voltage ICSP disabled
Unimplemented: Read as ‘0’
STVR: Stack Full/Underflow Reset Enable bit
1 = Stack full/underflow will cause Reset
0 = Stack full/underflow will not cause Reset
bit 7
Legend:
R = Readable bit
-n = Value when device is unprogrammed
Legend:
R = Readable bit
-n = Value when device is unprogrammed
DEBUG
MCLRE
Note:
R/P-1
R/P-1
The Timer1 oscillator shares the T1OSI and T1OSO pins with the PGD and PGC
pins used for programming and debugging.
When using the Timer1 oscillator, In-Circuit Serial Programming (ICSP) may not
function correctly (high voltage or low voltage), or the In-Circuit Debugger (ICD) may
not communicate with the controller. As a result of using either ICSP or ICD, the
Timer1 crystal may be damaged.
If ICSP or ICD operations are required, the crystal should be disconnected from the
circuit (disconnect either lead) or installed after programming. The oscillator loading
capacitors may remain in-circuit during ICSP or ICD operation.
U-0
U-0
—
—
P = Programmable bit
C = Clearable bit
U-0
U-0
—
—
U-0
U-0
—
—
PIC18F1220/1320
U = Unimplemented bit, read as ‘0’
u = Unchanged from programmed state
U = Unimplemented bit, read as ‘0’
u = Unchanged from programmed state
U-0
U-0
—
—
R/P-1
LVP
U-0
—
U-0
U-0
—
DS39605C-page 175
—
R/P-1
STVR
U-0
—
bit 0
bit 0