Oscillator Modes - Elan EM78P458 User Manual

Address Name
0x05 P5
0x06 P6
0x7~0x8 R7~R8
R9
0x9
(ADCON)
RA
0xA
(ADDDATA)
RB
0xB
(TMR1L)
RC
0xC
(TMR1H)
RD
0xD
(TMR2L)
RE
0xE
(TMR2H)
RF
0xF
(ISR)
0x10~0x3F R10~R3F
X: not used. U: unknown or don't care.
t: check Table 5
4.12 Oscillator

1. Oscillator Modes

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
This specification is subject to change without prior notice.
Reset Type
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit Name
Power-on
/RESET and WDT
Wake-up from Pin Changed
Bit 7 Bit 6 Bit 5
P P P
P57 P56 P55
1 1 1
1 1 1
P P P
P67 P66 P65
1 1 1
1 1 1
P P P
- - -
U U U
P P P
P P P
X X IOCS
0 0 0
0 0 0
P P P
- - -
0 0 0
0 0 0
P P P
Bit7 Bit6 Bit5
0 0 0
0 0 0
P P P
X X X
0 0 0
0 0 0
0 0 0
Bit7 Bit6 Bit5
0 0 0
0 0 0
P P P
X X X
0 0 0
0 0 0
0 0 0
X CMPIF PWM2IF
0 0 0
0 0 0
0 P P
- - -
U U U
P P P
P P P
P: previous value before reset.
45
EM78P458/459
Bit 4 Bit 3 Bit 2
P P P
P54 P53 P52
1 1 1
1 1 1
P P P
P64 P63 P62
1 1 1
1 1 1
P P P
- - -
U U U
P P P
P P P
ADRUN ADPD ADAS2
0 0 0
0 0 0
P P P
- - -
0 0 0
0 0 0
P P P
Bit4 Bit3 Bit2
0 0 0
0 0 0
P P P
X X X
0 0 0
0 0 0
0 0 0
Bit4 Bit3 Bit2
0 0 0
0 0 0
P P P
X X X
0 0 0
0 0 0
0 0 0
PWM1IF ADIF EXIF
0 0 0
0 0 0
P P P
- - -
U U U
P P P
P P P
OTP ROM
Bit 1 Bit 0
P P
P51 P50
1 1
1 1
P P
P61 P60
1 1
1 1
P P
- -
U U
P P
P P
ADAS1 ADAS0
0 0
0 0
P P
- -
0 0
0 0
P P
Bit1 Bit0
0 0
0 0
P P
Bit1 Bit0
0 0
0 0
P P
Bit1 Bit0
0 0
0 0
P P
Bit1 Bit0
0 0
0 0
P P
ICIF TCIF
0 0
0 0
P P
- -
U U
P P
P P
07.01.2003 (V1.3)