em78p210n ELAN Microelectronics Corp, em78p210n Datasheet - Page 55

• Manufacturer Part Number: em78p210n
• Description: 8-bit Microcontroller With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.2) 04.22.2008
(This specification is subject to change without further notice)
Bits 6, 5 and 4 (OSC2, OSC1 and OSC0): Oscillator Mode Selection bits
1
2
3
Bit 3: Not used (Reserved). This bit is set to 0 all the time
6.11.2 Code Option Register (Word 1)
Bits 12: Not used (reserved), fixed to “1” all the time.
Bits 11: Not used (reserved), fixed to “0” all the time.
Bit 10 (RESETENB): P81/RESET pin select bit
Bit 9 (RCOUT): System clock output enable bit in IRC or ERC mode
Bit 8 (NRHL): Noise rejection high/low pulse define bit. INT pin has a falling edge
Bits 2 ~ 0 (Protect): Protect Bits. Each protect status is as follows:
monic
ERC
ERC
IRC
IRC
LXT1
HXT1
LXT2
HXT2
Mne
In LXT1, LXT2, HXT1 and HXT2 modes; OSCI and OSCO are used as oscillator pins. These pins cannot
In ERC mode, OSCI is used as oscillator pin. OSCO/P52 is defined by code option Word 0 Bit 6 ~ Bit 4.
In IRC mode, P53 is normal I/O pin. OSCO/P52 is defined by code option Word 0 Bit 6 ~ Bit 4.
and should not be defined as normal I/O pins.
Bit
1
0
2
2
1
1
(Internal RC oscillator mode); P52/OSCO act as OSCO
(Internal RC oscillator mode); P52/OSCO act as P52
3
3
3
3
Bit 12 Bit 11
(External RC oscillator mode); P52/OSCO act as P52
(External RC oscillator mode); P52/OSCO act as OSCO
(Frequency range of XT mode is 1MHz~100kHz)
(Frequency range of XT mode is 32kHz)
(Frequency range of XT mode is 16MHz~6MHz)
(Frequency range of XT mode is 6MHz~1MHz) (default)
−
−
−
0 = P81 set to /RESET pin
1 = P81 is general purpose input pin or open drain for output port (Default)
0 = OSCO pin is open drain
1 = OSCO output instruction clock (Default)
−
−
−
trigger.
1 = Pulses equal to 32/fc is regarded as signal (Default)
0 = Pulses equal to 8/fc is regarded as signal
RESETENB
/RESET
Bit 10
Protect Bits
P81
Oscillator Modes
0
1
System_clk 32/fc Enable
Open_drain 8/fc Disable
RCOUT
Bit 9
NRHL NRE
Bit 8
Word 1
Bit 7
8-Bit Microcontroller with OTP ROM
Bit 6
−
−
−
High High High High
Low
Bit 5
C3
Low
Bit 4
Disable (Default)
C2
OSC2
0
0
0
0
1
1
1
1
Protect
Enable
Low
Bit 3
C1
OSC1
Low
Bit 2
C0
EM78P210N
0
0
1
1
0
0
1
1
RCM1 RCM0
High
Bit 1
Low
OSC0
0
1
0
1
0
1
0
1
High
Low
• 49
Bit 0