参数资料
型号: PIC18F252-E/SO
厂商: Microchip Technology
文件页数: 11/134页
文件大小: 0K
描述: IC MCU CMOS 40MHZ 16K FLSH28SOIC
产品培训模块: Asynchronous Stimulus
标准包装: 27
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 40MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,LVD,POR,PWM,WDT
输入/输出数: 23
程序存储器容量: 32KB(16K x 16)
程序存储器类型: 闪存
EEPROM 大小: 256 x 8
RAM 容量: 1.5K x 8
电压 - 电源 (Vcc/Vdd): 4.2 V ~ 5.5 V
数据转换器: A/D 5x10b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
包装: 管件
PIC16C9XX
DS30444E - page 108
1997 Microchip Technology Inc.
TABLE 14-4: STATUS BITS AND THEIR SIGNIFICANCE
TABLE 14-5: RESET CONDITION FOR SPECIAL REGISTERS
POR
TO
PD
0
1
Power-on Reset
0
x
Illegal, TO is set on POR
0
x
0
Illegal, PD is set on POR
1
0
1
WDT Reset
1
0
WDT Wake-up
1
u
MCLR Reset during normal operation
1
0
MCLR Reset during SLEEP or interrupt wake-up from SLEEP
Legend: u = unchanged, x = unknown
Condition
Program
Counter
STATUS
Register
PCON
Register
Power-on Reset
000h
0001 1xxx
---- --0-
MCLR Reset during normal operation
000h
000u uuuu
---- --u-
MCLR Reset during SLEEP
000h
0001 0uuu
---- --u-
WDT Reset
000h
0000 1uuu
---- --u-
WDT Wake-up
PC + 1
uuu0 0uuu
---- --u-
Interrupt wake-up from SLEEP
PC + 1(1)
uuu1 0uuu
---- --u-
Legend: u = unchanged, x = unknown, - = unimplemented bit read as '0'.
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 (0004h).
TABLE 14-6: INITIALIZATION CONDITIONS FOR ALL REGISTERS
Register
Applicable Devices
Power-on Reset
MCLR Resets
WDT Reset
Wake-up via
WDT or
Interrupt
W
923
924
xxxx xxxx
uuuu uuuu
INDF
923
924
N/A
TMR0
923
924
xxxx xxxx
uuuu uuuu
PCL
923
924
0000h
PC + 1(2)
STATUS
923
924
0001 1xxx
000q quuu(3)
uuuq quuu(3)
FSR
923
924
xxxx xxxx
uuuu uuuu
PORTA
923
924
--xx xxxx
--uu uuuu
PORTA
923
924
--0x 0000
(5)
--0u 0000
(5)
--uu uuuu
PORTB
923
924
xxxx xxxx
uuuu uuuu
PORTC
923
924
--xx xxxx
--uu uuuu
Legend: u = unchanged,
x
= unknown,
-
= unimplemented bit, read as '0', q = value depends on condition
Note 1: One or more bits in INTCON and/or PIR1 will be affected (to cause wake-up).
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: See Table 14-5 for reset value for specic condition.
4: Bits PIE1<6> and PIR1<6> are reserved on the PIC16C923, always maintain these bits clear.
5: PORTA values when read.
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