16F84A Microchip Technology, 16F84A Datasheet - Page 24

• Manufacturer Part Number: 16F84A
• Description: 18-pin Enhanced Flash/EEPROM 8-Bit Microcontroller
• Manufacturer: Microchip Technology

PIC16F84A
TABLE 6-3
TABLE 6-4
DS35007A-page 24
Power-on Reset
MCLR Reset during normal operation
MCLR Reset during SLEEP
WDT Reset (during normal operation)
WDT Wake-up
Interrupt wake-up from SLEEP
Legend: u = unchanged, x = unknown.
Note 1: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector
W
INDF
TMR0
PCL
STATUS
FSR
PORTA
PORTB
EEDATA
EEADR
PCLATH
INTCON
INDF
OPTION_REG
PCL
STATUS
FSR
TRISA
TRISB
EECON1
EECON2
PCLATH
INTCON
Legend: u = unchanged,
Note 1: One or more bits in INTCON will be affected (to cause wake-up).
Register
2: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h).
3: Table 6-3 lists the reset value for each specific condition.
4: On any device reset, these pins are configured as inputs.
5: This is the value that will be in the port output latch.
(0004h).
(4)
(5)
RESET CONDITION FOR PROGRAM COUNTER AND THE STATUS REGISTER
RESET CONDITIONS FOR ALL REGISTERS
Address
00h
01h
02h
03h
04h
05h
06h
08h
09h
0Ah
0Bh
80h
81h
82h
83h
84h
85h
86h
88h
89h
8Ah
8Bh
—
x = unknown,
Condition
Power-on Reset
xxxx xxxx
---- ----
xxxx xxxx
0000h
0001 1xxx
xxxx xxxx
---x xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
---0 0000
0000 000x
1111 1111
0000h
0001 1xxx
xxxx xxxx
---1 1111
1111 1111
---0 x000
---- ----
---0 0000
0000 000x
---- ----
- = unimplemented bit read as '0', q = value depends on condition.
Preliminary
MCLR Reset during:
– normal operation
– SLEEP
WDT Reset during nor-
mal operation
uuuu uuuu
---- ----
uuuu uuuu
0000h
000q quuu
uuuu uuuu
---u uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
---0 0000
0000 000u
---- ----
1111 1111
0000h
000q quuu
uuuu uuuu
---1 1111
1111 1111
---0 q000
---- ----
---0 0000
0000 000u
Program Counter
000h
000h
PC + 1
000h
000h
PC + 1
(3)
(3)
(1)
1998 Microchip Technology Inc.
Wake-up from SLEEP:
– through interrupt
– through WDT Time-out
uuuu uuuu
---- ----
uuuu uuuu
uuuq quuu
uuuu uuuu
---u uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
---u uuuu
uuuu uuuu
---- ----
uuuu uuuu
PC + 1
uuuq quuu
uuuu uuuu
---u uuuu
uuuu uuuu
---0 uuuu
---- ----
---u uuuu
uuuu uuuu
PC + 1
STATUS Register
0001 1xxx
000u uuuu
0001 0uuu
0000 1uuu
uuu0 0uuu
uuu1 0uuu
(2)
(3)
(1)
(3)
(1)