PIC16F505-E/ST Microchip Technology, PIC16F505-E/ST Datasheet - Page 47

• Manufacturer Part Number: PIC16F505-E/ST
• Description: IC MCU FLASH 1KX12 14TSSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F505-E/ST

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: POR, WDT
• Number Of I /o: 11
• Program Memory Size: 1.5KB (1K x 12)
• Program Memory Type: FLASH
• Ram Size: 72 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 14-TSSOP
• For Use With: AC162070 - HEADER INTRFC MPLAB ICD2 8/14P
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

7.3
The device differentiates between various kinds of
Reset:
• Power-on Reset (POR)
• MCLR Reset during normal operation
• MCLR Reset during Sleep
• WDT time-out Reset during normal operation
• WDT time-out Reset during Sleep
• Wake-up from Sleep on pin change
TABLE 7-3:
© 2009 Microchip Technology Inc.
W
INDF
TMR0
PC
STATUS
FSR
FSR
OSCCAL
GPIO
OPTION
TRIS
Legend: u = unchanged, x = unknown, – = unimplemented bit, read as ‘0’, q = value depends on condition.
Note 1:
(4)
(5)
Register
2:
3:
4:
5:
Reset
Bits <7:2> of W register contain oscillator calibration values due to MOVLW XX instruction at top of
memory.
See Table 7-5 for Reset value for specific conditions.
If Reset was due to wake-up on pin change, then bit 7 = 1. All other Resets will cause bit 7 = 0.
PIC12F509 only.
PIC12F508 only.
RESET CONDITIONS FOR REGISTERS – PIC12F508/509
Address
00h
01h
02h
03h
04h
04h
05h
06h
—
—
—
Power-on Reset
qqqq qqqu
xxxx xxxx
xxxx xxxx
1111 1111
0001 1xxx
110x xxxx
111x xxxx
1111 111-
--xx xxxx
1111 1111
--11 1111
PIC12F508/509/16F505
Some registers are not reset in any way, they are
unknown on POR and unchanged in any other Reset.
Most other registers are reset to “Reset state” on
Power-on Reset (POR), MCLR, WDT or Wake-up on
pin change Reset during normal operation. They are
not affected by a WDT Reset during Sleep or MCLR
Reset during Sleep, since these Resets are viewed as
resumption of normal operation. The exceptions to this
are TO, PD and RBWUF/GPWUF bits. They are set or
cleared differently in different Reset situations. These
bits are used in software to determine the nature of
Reset. See Table 7-4 for a full description of Reset
states of all registers.
(1)
MCLR Reset, WDT Time-out,
Wake-up On Pin Change
qqqq qqqu
uuuu uuuu
uuuu uuuu
1111 1111
q00q quuu
11uu uuuu
111u uuuu
uuuu uuu-
--uu uuuu
1111 1111
--11 1111
DS41236E-page 47
(1)
(2), (3)