EM78P153EN EMC [ELAN Microelectronics Corp], EM78P153EN Datasheet - Page 29

• Manufacturer Part Number: EM78P153EN
• Description: EM78P153E is an 8-bit microprocessor with low-power and high-speed CMOS technology
• Manufacturer: EMC [ELAN Microelectronics Corp]

This specification is subject to change without prior notice.
4.9 Power On Considerations
Any microcontroller is not guaranteed to start to operate properly before the power supply stays at its
steady state.
• Bit 4 (Type): Reserved.
• Bit 3 (RCOUT): A selecting bit of High or Low frequency for internal RC Oscillator.
• Bit 2, Bit 1, and Bit 0 ( CAL2, CAL1, CAL 0 ): Calibrator of internal RC mode Bit 3
<Note>: RC mode set-up time always 135ns.
Table 13 Calibration Selection for Internal RC Mode
*: 1. Theoretical values, an instance of the high frequency mode, are shown for reference only, It
The bit4 set to “0” all the time.
C2
RCOUT
1
1
0
0
1
1
0
0
2. Similar way of calculation is also applicable for low frequency mode.
3. Code Option Register (Word 1)
4. Customer ID Register (Word 2)
0
1
depend on process.
Bit 1, and Bit 0 ( RCM1, RCM0): RC mode selection bits
Bit 12~ 0 : Customer’s ID code
RCM 1
C1
RCM1
1
0
0
0
0
0
0
1
1
1
1
Bit1
1
XXXXXXXXXXXXX
WORD1
C0
RCM 0
1
0
1
0
1
0
1
0
Pin Function
Bit 12~Bit 0
1
1
0
OSCO
P64
RCM0
*Cycle Time (ns)
Bit0
0
200.4
211.9
223.7
236.4
250.0
264.6
279.3
295.0
*Frequency(MHz)
455kHz
4
1
29
*Frequency (MHz)
4.99
4.72
4.47
4.23
4.00
3.78
3.58
3.39
EM78P153E
OTP ROM
2002/03/01