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参数资料
| 型号： | PIC16F54T-I/SS |
| 厂商： | Microchip Technology |
| 文件页数： | 18/88页 |
| 文件大小： | 0K |
| 描述： | IC MCU FLASH 512X12 20SSOP |
| 产品培训模块： | Asynchronous Stimulus |
| 标准包装： | 1,600 |
| 系列： | PIC® 16F |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 20MHz |
| 外围设备： | POR，WDT |
| 输入/输出数： | 12 |
| 程序存储器容量： | 768B（512 x 12） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 25 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2 V ~ 5.5 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 包装： | 带卷 (TR) |
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2007 Microchip Technology Inc.
DS41213D-page 23
PIC16F5X
5.0
RESET
The PIC16F5X devices may be reset in one of the
following ways:
Power-on Reset (POR)
MCLR Reset (normal operation)
MCLR Wake-up Reset (from Sleep)
WDT Reset (normal operation)
WDT Wake-up Reset (from Sleep)
Table 5-1 shows these Reset conditions for the PCL
and STATUS registers.
Some registers are not affected in any Reset condition.
Their status is unknown on POR and unchanged in any
other Reset. Most other registers are reset to a “Reset
state” on Power-on Reset (POR), MCLR or WDT
Reset. A MCLR or WDT wake-up from Sleep also
results in a device Reset and not a continuation of
operation before Sleep.
The TO and PD bits (STATUS <4:3>) are set or cleared
depending on the different Reset conditions (Table 5-1).
These bits may be used to determine the nature of the
Reset.
Table 5-3 lists a full description of Reset states of all
registers. Figure 5-1 shows a simplified block diagram
of the on-chip Reset circuit.
TABLE 5-1:
STATUS BITS AND THEIR SIGNIFICANCE
TABLE 5-2:
SUMMARY OF REGISTERS ASSOCIATED WITH RESET
Condition
TO
PD
Power-on Reset
11
MCLR Reset (normal operation)
uu
MCLR Wake-up (from Sleep)
10
WDT Reset (normal operation)
01
WDT Wake-up (from Sleep)
00
Legend: u = unchanged, x = unknown, — = unimplemented read as ‘0’.
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR
Value on
MCLR and
WDT Reset
03h
STATUS
PA2
PA1
PA0
TO
PD
Z
DC
C
0001 1xxx
000q quuu
Legend: u = unchanged, x = unknown, q = see Table 5-1 for possible values.
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