PIC16C55X, EPROM-Based 8-Bit CMOS MCU Data Sheet

PIC16C55XTABLE 7-5:INITIALIZATION CONDITION FOR SPECIAL REGISTERSConditionProgramCounterSTATUSRegisterPCONRegisterPower-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 uuuu ---- --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, reads as ‘0’.Note 1: When the wake-up is due to an interrupt and global enable bit, GIE is set, the PC is loaded with the interrupt vector(0004h) after execution of PC+1.TABLE 7-6:INITIALIZATION CONDITION FOR REGISTERS• MCLR Reset duringnormal operation• MCLR Reset duringSLEEP• Wake up from SLEEPthrough interrupt• Wake up from SLEEPthrough WDT time-outRegister Address Power-on Reset • WDT ResetW - xxxx xxxx uuuu uuuu uuuu uuuuINDF 00h - - -TMR0 01h xxxx xxxx uuuu uuuu uuuu uuuuPCL 02h 0000 0000 0000 0000 PC + 1 (2)STATUS 03h 0001 1xxx 000q quuu (3) uuuq quuu (3)FSR 04h xxxx xxxx uuuu uuuu uuuu uuuuPORTA 05h ---x xxxx ---u uuuu ---u uuuuPORTB 06h xxxx xxxx uuuu uuuu uuuu uuuuPCLATH 0Ah ---0 0000 ---0 0000 ---u uuuuINTCON 0Bh 0000 000x 0000 000u uuuu uuuu (1)OPTION 81h 1111 1111 1111 1111 uuuu uuuuTRISA 85h ---1 1111 ---1 1111 ---u uuuuTRISB 86h 1111 1111 1111 1111 uuuu uuuuPCON 8Eh ---- --0- ---- --u- ---- --u-Legend: u = unchanged, x = unknown, - = unimplemented bit, reads as ‘0’,q = value depends on condition.Note 1: One or more bits in INTCON 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 interruptvector (0004h).3: See Table 7-5 for reset value for specific condition.DS40143C-page 42 Preliminary © 1998 Microchip Technology Inc.