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CF745 数据表(PDF) 36 Page - Microchip Technology |
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CF745 数据表(HTML) 36 Page - Microchip Technology |
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36 / 217 page  PIC16C5X DS30453B-page 36 Preliminary © 1998 Microchip Technology Inc. TABLE 7-3: RESET CONDITIONS FOR SPECIAL REGISTERS TABLE 7-4: RESET CONDITIONS FOR ALL REGISTERS FIGURE 7-8: SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT Condition PCL Addr: 02h STATUS Addr: 03h Power-On Reset 1111 1111 0001 1xxx MCLR reset (normal operation) 1111 1111 000u uuuu(1) MCLR wake-up (from SLEEP) 1111 1111 0001 0uuu WDT reset (normal operation) 1111 1111 0000 uuuu(2) WDT wake-up (from SLEEP) 1111 1111 0000 0uuu Legend: u = unchanged, x = unknown, - = unimplemented read as '0'. Note 1: TO and PD bits retain their last value until one of the other reset conditions occur. 2: The CLRWDT instruction will set the TO and PD bits. Register Address Power-On Reset MCLR or WDT Reset W N/A xxxx xxxx uuuu uuuu TRIS N/A 1111 1111 1111 1111 OPTION N/A --11 1111 --11 1111 INDF 00h xxxx xxxx uuuu uuuu TMR0 01h xxxx xxxx uuuu uuuu PCL(1) 02h 1111 1111 1111 1111 STATUS(1) 03h 0001 1xxx 000q quuu FSR 04h 1xxx xxxx 1uuu uuuu PORTA 05h ---- xxxx ---- uuuu PORTB 06h xxxx xxxx uuuu uuuu PORTC(2) 07h xxxx xxxx uuuu uuuu General Purpose Register Files 07-7Fh xxxx xxxx uuuu uuuu Legend: u = unchanged, x = unknown, - = unimplemented, read as '0', q = see tables in Section 7.7 for possible values. Note 1: See Table 7-3 for reset value for specific conditions. 2: General purpose register file on PIC16C52/C54s/CR54s/C56s/CR56s/C58s/CR58s 8-bit Asynch Ripple Counter (Start-Up Timer) SQ R Q VDD MCLR/VPP pin Power-Up Detect On-Chip RC OSC POR (Power-On Reset) WDT Time-out RESET CHIP RESET WDT |
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