Filter
Top Products
EM78P458/459
OTP ROM
Address Name Reset Type Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Wake-up from Pin Changed P P P P P P P P
Bit Name P57 P56 P55 P54 P53 P52 P51 P50
Power-on 1 1 1 1 1 1 1 1
/RESET and WDT 1 1 1 1 1 1 1 1
0x05 P5
Wake-up from Pin Changed P P P P P P P P
Bit Name P67 P66 P65 P64 P63 P62 P61 P60
Power-on 1 1 1 1 1 1 1 1
/RESET and WDT 1 1 1 1 1 1 1 1
0x06 P6
Wake-up from Pin Changed P P P P P P P P
Bit Name - - - - - - - -
Power-on U U U U U U U U
/RESET and WDT P P P P P P P P
0x7~0x8 R7~R8
Wake-up from Pin Changed P P P P P P P P
Bit Name X X IOCS ADRUN ADPD ADAS2 ADAS1 ADAS0
Power-on 0 0 0 0 0 0 0 0
/RESET and WDT 0 0 0 0 0 0 0 0
0x9
R9
(ADCON)
Wake-up from Pin Changed P P P P P P P P
Bit Name - - - - - - - -
Power-on 0 0 0 0 0 0 0 0
/RESET and WDT 0 0 0 0 0 0 0 0
0xA
RA
(ADDDATA)
Wake-up from Pin Changed P P P P P P P P
Bit Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Power-on 0 0 0 0 0 0 0 0
/RESET and WDT 0 0 0 0 0 0 0 0
0xB
RB
(TMR1L)
Wake-up from Pin Changed P P P P P P P P
Bit Name X X X X X X Bit1 Bit0
Power-on 0 0 0 0 0 0 0 0
/RESET and WDT 0 0 0 0 0 0 0 0
0xC
RC
(TMR1H)
Wake-up from Pin Changed 0 0 0 0 0 0 P P
Bit Name Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Power-on 0 0 0 0 0 0 0 0
/RESET and WDT 0 0 0 0 0 0 0 0
0xD
RD
(TMR2L)
Wake-up from Pin Changed P P P P P P P P
Bit Name X X X X X X Bit1 Bit0
Power-on 0 0 0 0 0 0 0 0
/RESET and WDT 0 0 0 0 0 0 0 0
0xE
RE
(TMR2H)
Wake-up from Pin Changed 0 0 0 0 0 0 P P
Bit Name X CMPIF PWM2IF PWM1IF ADIF EXIF ICIF TCIF
Power-on 0 0 0 0 0 0 0 0
/RESET and WDT 0 0 0 0 0 0 0 0
0xF
RF
(ISR)
Wake-up from Pin Changed 0 P P P P P P P
Bit Name - - - - - - - -
Power-on U U U U U U U U
/RESET and WDT P P P P P P P P
0x10~0x3F R10~R3F
Wake-up from Pin Changed P P P P P P P P
X: not used. U: unknown or don’t care. P: previous value before reset.
t: check Table 5
4.12 Oscillator
1. Oscillator Modes
This specification is subject to change without prior notice. 07.01.2003 (V1.3)
45
The EM78P458 and EM78P459 can be operated in four different oscillator modes, such as High
XTAL oscillator mode (HXT), Low XTAL oscillator mode (LXT), External RC oscillator mode (ERC),
and RC oscillator mode with Internal capacitor (IC). Users can select one of them by programming the