MC9S12E128CPV Freescale Semiconductor, MC9S12E128CPV Datasheet - Page 203

• Manufacturer Part Number: MC9S12E128CPV
• Description: Microcontrollers (MCU) 16 Bit 16MHz
• Manufacturer: Freescale Semiconductor

Specifications of MC9S12E128CPV

• Data Bus Width: 16 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 8 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 92
• Number Of Timers: 16 bit
• Operating Supply Voltage: 3.135 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP-112
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• On-chip Dac: 8 bit, 2 Channel
• Lead Free Status / Rohs Status: No RoHS Version Available

5.2.3
The XCLKS is an input signal which controls whether a crystal in combination with the internal Colpitts
(low power) oscillator is used or whether the Pierce oscillator/external clock circuitry is used. The XCLKS
signal is sampled during reset with the rising edge of RESET.
sampled XCLKS signal. Refer to the device overview chapter for polarity of the XCLKS pin.
Freescale Semiconductor
XCLKS — Colpitts/Pierce Oscillator Selection Signal
MCU
* Rs can be zero (shorted) when used with higher frequency crystals.
Refer to manufacturer’s data.
Figure 5-2. Pierce Oscillator Connections (XCLKS = 1)
EXTAL
Figure 5-3. External Clock Connections (XCLKS = 1)
XCLKS
XTAL
0
1
Table 5-1. Clock Selection Based on XCLKS
MCU
EXTAL
Colpitts oscillator selected
Pierce oscillator/external clock selected
MC9S12E128 Data Sheet, Rev. 1.07
RS*
XTAL
RB
Not Connected
Description
CMOS-Compatible
External Oscillator
(V
Crystal or Ceramic
Resonator
DDPLL
Level)
Table 5-1
C3
C4
V
SSPLL
lists the state coding of the
Chapter 5 Oscillator (OSCV2)
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