MC9S12Q128_10 Datasheet, PDF (615/644 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Appendix A Electrical Characteristics
A.3 MSCAN
Table A-14. MSCAN Wake-up Pulse Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C
Rating
1 P MSCAN Wake-up dominant pulse filtered
2 P MSCAN Wake-up dominant pulse pass
Symbol Min Typ Max Unit
t_WUP
t_WUP
—
—
2
us
5
—
—
us
A.4 Reset, Oscillator and PLL
This section summarizes the electrical characteristics of the various startup scenarios for Oscillator and
Phase-Locked-Loop (PLL).
A.4.1 Startup
Table A-15 summarizes several startup characteristics explained in this section. Detailed description of the
startup behavior can be found in the Clock and Reset Generator (CRG) Block User Guide.
Table A-15. Startup Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C
Rating
Symbol
Min
Typ
Max
Unit
1
T POR release level
V_PORR
—
—
2.07
V
2
T POR assert level
V_PORA
0.97
—
—
V
3
D Reset input pulse width, minimum input time PW_RSTL
2
—
—
t_osc
4
D Startup from Reset
n_RST
192
—
196
n_osc
5
D
Interrupt pulse width, IRQ edge-sensitive
mode
PW_IRQ
20
—
—
ns
6
D Wait recovery startup time
t_WRS
—
—
14
t_cyc
A.4.1.1 POR
The release level V_PORR and the assert level V_PORA are derived from the V_DD supply. They are also valid
if the device is powered externally. After releasing the POR reset the oscillator and the clock quality check
are started. If after a time t_CQOUT no valid oscillation is detected, the MCU will start using the internal self
clock. The fastest startup time possible is given by n_uposc.
A.4.1.2 LVR
The release level V_LVRR and the assert level V_LVRA are derived from the V_DD supply. They are also valid
if the device is powered externally. After releasing the LVR reset the oscillator and the clock quality check
are started. If after a time t_CQOUT no valid oscillation is detected, the MCU will start using the internal self
clock. The fastest startup time possible is given by n_uposc.
Freescale Semiconductor
MC9S12Q128
615
Rev 1.10