MC9S12C Datasheet, PDF (659/680 Pages) Motorola, Inc – 16-Bit Microcontroller

Appendix A Electrical Characteristics
Table A-17. PLL Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C
Rating
Symbol
Min
Typ
Max
Unit
1 P Self Clock Mode frequency
f_SCM
1
—
5.5
MHz
2 D VCO locking range
f_VCO
8
—
50
MHz
3
D
Lock Detector transition from Acquisition to Tracking
mode
|∆_trk|
3
—
4
%⁽¹⁾
4 D Lock Detection
5 D Un-Lock Detection
|∆_Lock|
0
—
1.5
%¹
|∆_unl|
0.5
—
2.5
%¹
6
D
Lock Detector transition from Tracking to Acquisition
mode
|∆_unt|
6
—
8
%¹
7 C PLLON Total Stabilization delay (Auto Mode) ⁽²⁾
t_stab
—
0.5
—
ms
8 D PLLON _Acquisition mode stabilization delay ²
t_acq
—
0.3
—
ms
9 D PLLON Tracking mode stabilization delay ²
t_al
—
0.2
—
ms
10 D Fitting parameter VCO loop gain
K₁
—
-100
—
MHz/V
11 D Fitting parameter VCO loop frequency
f₁
—
60
—
MHz
12 D Charge pump current acquisition mode
| i_ch |
—
38.5
—
µA
13 D Charge pump current tracking mode
| i_ch |
—
3.5
—
µA
14 C Jitter fit parameter 1²
j₁
—
—
1.1
%
15 C Jitter fit parameter 2²
1. % deviation from target frequency
j₂
—
—
0.13
%
2. f_OSC = 4MHz, f_BUS = 25MHz equivalent f_VCO = 50MHz: REFDV = #$03, SYNR = #$018, Cs = 4.7nF, Cp = 470pF, Rs = 10KΩ.
A.5 NVM, Flash, and EEPROM
A.5.1 NVM Timing
The time base for all NVM program or erase operations is derived from the oscillator. A minimum
oscillator frequency f_NVMOSC is required for performing program or erase operations. The NVM modules
do not have any means to monitor the frequency and will not prevent program or erase operation at
frequencies above or below the specified minimum. Attempting to program or erase the NVM modules at
a lower frequency a full program or erase transition is not assured.
The Flash program and erase operations are timed using a clock derived from the oscillator using the
FCLKDIV and ECLKDIV registers respectively. The frequency of this clock must be set within the limits
specified as f_NVMOP.
The minimum program and erase times shown in Table A-18 are calculated for maximum f_NVMOP and
maximum f_bus. The maximum times are calculated for minimum f_NVMOP and a f_bus of 2MHz.
Freescale Semiconductor
MC9S12C-Family / MC9S12GC-Family
659
Rev 01.23