參數(shù)資料
型號(hào): PIC16F526-E/MG
廠商: Microchip Technology
文件頁(yè)數(shù): 73/122頁(yè)
文件大小: 0K
描述: MCU PIC 1.5K FLASH 3X3 16QFN
標(biāo)準(zhǔn)包裝: 120
系列: PIC® 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 11
程序存儲(chǔ)器容量: 1.5KB(1K x 12)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 67 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 3x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 16-VFQFN 裸露焊盤
包裝: 托盤
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PIC18F2221/2321/4221/4321 FAMILY
DS39689F-page 54
2009 Microchip Technology Inc.
5.6
Reset State of Registers
Most registers are unaffected by a Reset. Their status
is unknown on POR and unchanged by all other
Resets. The other registers are forced to a “Reset
state” depending on the type of Reset that occurred.
Most registers are not affected by a WDT wake-up,
since this is viewed as the resumption of normal oper-
ation. Status bits from the RCON register, RI, TO, PD,
POR and BOR, are set or cleared differently in different
Reset situations, as indicated in Table 5-3. These bits
are used in software to determine the nature of the
Reset.
Table 5-4 describes the Reset states for all of the
Special Function Registers. These are categorized by
Power-on and Brown-out Resets, Master Clear and
WDT Resets and WDT wake-ups.
TABLE 5-3:
STATUS BITS, THEIR SIGNIFICANCE AND THE INITIALIZATION CONDITION
FOR RCON REGISTER
Condition
Program
Counter
RCON Register
STKPTR Register
RI
TO
PD
POR BOR STKFUL
STKUNF
Power-on Reset
0000h
11
100
0
RESET Instruction
0000h
0u
uuu
u
Brown-out
0000h
11
1u0
u
MCLR during power-managed Run modes
0000h
u1
uuu
u
MCLR during power-managed Idle modes
and Sleep mode
0000h
u1
0uu
u
WDT Time-out during full power or
power-managed Run mode
0000h
u0
uuu
u
MCLR during full power execution
0000h
uu
uuu
u
Stack Full Reset (STVREN = 1)
0000h
uu
uuu
1
u
Stack Underflow Reset (STVREN = 1)
0000h
uu
uuu
u
1
Stack Underflow Error (not an actual Reset,
STVREN = 0)
0000h
uu
uuu
u
1
WDT time-out during power-managed Idle or
Sleep modes
PC + 2
u0
0uu
u
Interrupt exit from power-managed modes
PC + 2(1)
uu
0uu
u
Legend: u = unchanged
Note 1:
When the wake-up is due to an interrupt and the GIEH or GIEL bits are set, the PC is loaded with the
interrupt vector (008h or 0018h).
2:
Reset state is ‘1’ for POR and unchanged for all other Resets when software BOR is enabled
(BOREN<1:0> Configuration bits = 01 and SBOREN = 1); otherwise, the Reset state is ‘0’.
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