MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 328

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

S12 Clock, Reset and Power Management Unit (S12CPMU)
The Voltage Regulator (IVREG) has the following features:
The Phase Locked Loop (PLL) has the following features:
The Internal Reference Clock (IRC1M) has the following features:
Other features of the S12CPMU include
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This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
Transconductance (gm) sized for optimum start-up margin for typical crystals
Dynamic gain control eliminates the need for external current limiting resistor
Integrated resistor eliminates the need for external bias resistor.
Low power consumption: Operates from internal 1.8V (nominal) supply, Amplitude control limits
power
Input voltage range from 3.13V to 5.5V
Low-voltage detect (LVD) with low-voltage interrupt (LVI)
Power-on reset (POR)
Low-voltage reset (LVR)
highly accurate and phase locked frequency multiplier
Configurable internal filter for best stability and lock time.
Frequency modulation for defined jitter and reduced emission
Automatic frequency lock detector
Interrupt request on entry or exit from locked condition
Reference clock either external (crystal) or internal square wave (1MHz IRC1M) based.
PLL stability is sufficient for LIN communication, even if using IRC1M as reference clock
Frequency trimming
(A factory trim value for 1MHz is loaded from Flash Memory into the IRCTRIM register after
reset, which can be overwritten by application if required)
Temperature Coefficient (TC) trimming.
(A factory trim value is loaded from Flash Memory into the IRCTRIM register to turned off TC
trimming after reset. Application can trim the TC if required by overwriting the IRCTRIM
register).
Clock monitor to detect loss of crystal
Autonomous periodical interrupt (API)
Bus Clock Generator
— Clock switch to select either PLLCLK or external crystal/resonator based Bus Clock
— PLLCLK divider to adjust system speed
System Reset generation from the following possible sources:
— Power-on reset (POR)
— Low-voltage reset (LVR)
— Illegal address access
MC9S12G Family Reference Manual,
Rev.1.01
Freescale Semiconductor