EM78P341N/342N/343N
8-Bit Microprocessor with OTP ROM
Bit 7 (NRE):
Noise rejection enable
0 = disable noise rejection
1 = enable noise rejection (default), but in Low Crystal oscillator
(LXT) mode, the noise rejection circuit is always disabled.
Bit 6 (CYES):
Instruction cycle selection bit
0 = one instruction cycle
1 = two instructions cycles (default)
Bit 5, 4, 3, & Bit 2 (C3, C2, C1, C0): Calibrator of internal RC mode
C3, C2, C1, & C0 must be set to “1” only (auto-calibration).
Bit 1 & Bit 0 (RCM1, RCM0): RC mode selection bits
RCM 1
RCM 0
Frequency (MHz)
1
1
0
0
1
0
1
0
4(Default)
16
1
455kHz
6.13.3 Customer ID Register (Word 2)
Word 2
Bit 12 Bit 11 Bit 10 Bit 9
Bit 8
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
–
–
–
–
RESETENB
–
WDTPS
×
×
×
×
×
×
Bits 12 ~ 9: Not used (reserved). These bits are set to “1” all the time.
Bit 8 (RESETENB): P71/RESET pin select bit
1 = P71 is general purpose input pin or open-drain for output
Port (default)
0 = P71 set to /RESET pin
Bit 7: Not used (reserved). This bit is set to “1” all the time.
Bit 6 (WDTPS): WDT Time-out Period Selection bit
WDT Time
Watchdog Timer*
1
0
18 ms (Default)
4.5 ms
*Theoretical values, for reference only
Bits 5 ~ 0: Customer’s ID code
Product Specification (V1.0) 12.01.2006
(This specification is subject to change without further notice)
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ELAN [ ELAN MICROELECTRONICS CORP ]
