em78p134n ELAN Microelectronics Corp, em78p134n Datasheet - Page 53

• 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)
Mnemonic HLP
Bit
1
0
Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7
High Low
Low High High High High High
5.12.2 Code Option Register (Word 1)
Bit 12 (HLP): high/low power mode
Bits 11 ~ 7 (C4 ~ C0): Calibrator of internal RC mode. These bits must always be set
Bits 6 ~ 5 (RCM1 ~ RCM0): RC mode selection bits
Bits 4 ~ 1(OSC3 ~ OSC0): Oscillator mode selection bits
Bit 0 (RCOUT): Selection bit of Oscillator output or I/O port.
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)
C4
RCM 1
2
2
1
1
(Internal RC oscillator mode); P64/OSCO functions as P64
(Internal RC oscillator mode); P64/OSCO funtions as OSCO
1
1
0
0
RCOUT
(External RC oscillator mode); P64/OSCO functions as OSCO
(External RC oscillator mode); P64/OSCO funcions as P64
Low
C3
0
1
Low
C2
0: Low power mode
1: High power mode (default)
RCM 0
1
0
1
0
Low
C1
to “1” only (auto calibration)
Oscillator Modes
OSCO output system clock (default)
Low
C0
OSCO pin is open drain
RCM1
Word 1
Bit 6
High
Low
Pin Function
Frequency (MHz)
RCM0
455kHz
Bit 5
High
Low
16
4
8
8-Bit Microcontroller with OTP ROM
OSC3
Bit 4
High
Low
OSC2
Bit 3
High
Low
OSC3 OSC2 OSC1 OSC0
OSC1
Bit 2
High
Low
0
0
0
0
0
0
1
0
0
EM78P134N
1
1
0
0
0
0
1
1
1
OSC0
Bit 1
High
Low
0
0
1
1
0
0
1
1
1
System
RCOUT
Open
clock
Bit 0
drain
• 47
0
1
0
1
0
1
0
1
1