
PIC16C5X
DS30453D-page 20
Preliminary
2002 Microchip Technology Inc.
TABLE 5-3:
RESET CONDITIONS FOR ALL REGISTERS
FIGURE 5-1:
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
Register
Address
Power-On Reset
MCLR or WDT Reset
WN/A
xxxx xxxx
uuuu uuuu
TRIS
N/A
1111 1111
OPTION
N/A
--11 1111
INDF
00h
xxxx xxxx
uuuu uuuu
TMR0
01h
xxxx xxxx
uuuu uuuu
PCL
02h
1111 1111
STATUS
03h
0001 1xxx
000q quuu
FSR(1)
04h
1xxx xxxx
1uuu uuuu
PORTA
05h
---- xxxx
---- uuuu
PORTB
06h
xxxx xxxx
uuuu uuuu
PORTC(2)
07h
xxxx xxxx
uuuu uuuu
General Purpose Register Files
07-7Fh
xxxx xxxx
uuuu uuuu
Legend:
x
= unknown
u
= unchanged
-
= unimplemented, read as ’0’
q
= see tables in
Table 5-1 for possible values.
Note 1: These values are valid for PIC16C57/CR57/C58/CR58. For the PIC16C54/CR54/C55/C56/CR56, the
value on RESET is 111x xxxx and for MCLR and WDT Reset, the value is 111u uuuu.
2: General purpose register file on PIC16C54/CR54/C56/CR56/C58/CR58.
8-bit Asynch
Ripple Counter
(Device Reset
SQ
R
Q
VDD
MCLR/VPP pin
Power-Up
Detect
On-Chip
RC OSC
POR (Power-On Reset)
WDT Time-out
RESET
CHIP RESET
WDT
Timer)