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EM78P221/2N
8-Bit Microcontroller with OTP ROM
30 •
Product Specification (V1.0) 10.19.2007
(This specification is subject to change without further notice)
6.5.1.2 Register Initial Values after Reset
The following table summarizes the registers initialized values.
Address Name Reset Type Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit Name INTE INT TS TE PSTE PST2 PST1 PST0
Power-on 0 0 0 0 0 0 0 0
/RESET & WDT 0 0 0 0 0 0 0 0
N/A CONT
Wake-up from
Pin Change
P P P P P P P P
Bit Name - - - - - - - -
Power-on U U U U U U U U
/RESET & WDT P P P P P P P P
0x00 R0 (IAR)
Wake-up from
Pin Change
P P P P P P P P
Bit Name - - - - - - BS1 BS
Power-on 0 0 0 0 0 0 0 0
/RESET & WDT 0 0 0 0 0 0 0 0
0x01 R1 (MSR)
Wake-up from
Pin Change
P P P P P P P P
Bit Name - - - - - - - -
Power-on 0 0 0 0 0 0 0 0
/RESET & WDT 0 0 0 0 0 0 0 0
0x02 R2 (PC)
Wake-up from
Pin Change
Jump to Address 0x08 or continue to execute next instruction
Bit Name - - - T P Z DC C
Power-on 0 0 0 1 1 U U U
/RESET & WDT 0 0 0 t t P P P
0x03 R3 (SR)
Wake-up from
Pin Change
P P P t t P P P
Bit Name - - - - - - - -
Power-on 0 0 U U U U U U
/RESET & WDT 0 0 P P P P P P
0x04 R4 (RSR)
Wake-up from
Pin Change
P P P P P P P P
Bit Name P57 P56 P55 P54 P53 P52 P51 P50
Power-on U U U U U U U U
/RESET & WDT U U U U U U U U
0x05 Bank 0-R5
Wake-up from
Pin Change
P P P P P P P P
Bit Name P67 P66 P65 P64 P63 P62 P61 P60
Power-on U U U U U U U U
/RESET & WDT U U U U U U U U
0x06 Bank 0-R6
Wake-up from
Pin Change
P P P P P P P P