em78p134n ELAN Microelectronics Corp, em78p134n Datasheet - Page 45

• Manufacturer Part Number: em78p134n
• Description: 8-bit Microcontroller With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.6) 06.02.2010
(This specification is subject to change without further notice)
ERC
ERC
IRC
IRC
LXT1 (Frequency range of LXT1 mode is 100kHz ~ 1 MHz)
HXT1 (Frequency range of HXT mode is 12 MHz ~ 20 MHz)
LXT2 (Frequency range of XT mode is 32kHz)
HXT2 (Frequency range of XT mode is 6 MHz ~ 12 MHz)
XT (Frequency range of XT mode is 1 MHz ~ 6 MHz) (default)
5.9.4 Wake-up from Sleep Mode
5.10 Oscillator
5.10.1 Oscillator Modes
The EM78P134N can be operated in four different oscillator modes, such as High
Crystal oscillator mode (HXT), Low Crystal oscillator mode (LXT), External RC
oscillator mode (ERC), and RC oscillator mode with Internal RC oscillator mode (IRC).
One of the four modes can be selected by programming the OSC3, OSC2, OCS1, and
OSC0 in the Code Option register.
The Oscillator modes defined by OSC3, OSC2, OCS1, and OSC0 are described below.
1
2
The maximum operating frequency limit of crystal/resonator at different VDDs, are as
follows:
2
2
In ERC mode, OSCI is used as oscillator pin. OSCO/P64 is defined by code option Word 0
In IRC mode, P65 is normal I/O pin. OSCO/P64 is defined by code option Word 0 Bit 9 ~ Bit 6.
Bit 9 ~ Bit 6.
1
1
(Internal RC oscillator mode); P64/OSCO functions as P64
(Internal RC oscillator mode); P64/OSCO funtions as OSCO
(External RC oscillator mode); P64/OSCO funcions as P64
(External RC oscillator mode); P64/OSCO functions as OSCO
even in Sleep mode.
conservation.
before entering into sleep mode.
If enabled, the comparator remains active and the interrupt remains functional,
If a mismatch occurs, the interrupt will wake up the device from Sleep mode.
Power consumption should be taken into consideration for the benefit of energy
If the function is not implemented during Sleep mode, turn off the comparator
Conditions
Two clocks
Oscillator Modes
VDD
2.3
4.5
8-Bit Microcontroller with OTP ROM
Max. Freq. (MHz)
16
4
OSC3 OSC2 OSC1 OSC0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
1
1
1
1
EM78P134N
0
0
1
1
0
0
1
1
1
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0
1
0
1
1
0
1
0
1