PXR40 Datasheet, PDF (66/100 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Electrical characteristics
Table 14. DSPI LVDS pad specification (continued)
9 Diff Skew Itphla-tplhbI or
Itplhb-tphlaI
T_SKEW
—
—
—
Termination
10 Trans. Line (differential Zo)
—
11 Temperature
—
—
95
100
—
–40
—
0.5
ns
105
ohms
150
C
5.8 Oscillator and FMPLL electrical characteristics
Table 15. FMPLL Electrical Specifications¹
(V_DDSYN = 3.0 V to 3.6 V, V_SS = V_SSSYN = 0 V, T_A = T_L to T_H)
Spec
Characteristic
Symbol
Min
Max
Unit
1 PLL Reference Frequency Range² (Normal Mode)
Crystal Reference (PLLCFG2 = 0b0)
Crystal Reference (PLLCFG2 = 0b1)
External Reference (PLLCFG2 = 0b0)
External Reference (PLLCFG2 = 0b1)
f_{ref_crystal}
8
f_{ref_crystal}
16
f_{ref_ext}
8
f_{ref_ext}
16
2 Loss of Reference Frequency⁴
f_LOR
100
3 Self Clocked Mode Frequency⁵
f_SCM
4
4 PLL Lock Time⁶
t_LPLL
—
5 Duty Cycle of Reference ⁷
t_DC
40
20
40³
20
40
1000
16
< 400
60
MHz
kHz
MHz
s
%
6 Frequency un-LOCK Range
f_UL
–4.0
4.0
% f_sys
7 Frequency LOCK Range
8 D_CLKOUT Period Jitter^{8, 9} Measured at f_SYS Max
Cycle-to-cycle Jitter
f_LCK
C_Jitter
–2.0
–5
2.0
% f_sys
5
%f_clkout
9 Peak-to-Peak Frequency Modulation Range Limit ^10,11
(f_sys Max must not be exceeded)
10 FM Depth Tolerance¹²
C_mod
C_{mod_err}
0
–0.25
4
0.25
%f_sys
%f_sys
11 VCO Frequency
f_VCO
192
600
MHz
12 Modulation Rate Limits¹³
f_mod
0.400
1
MHz
13 Predivider output frequency range¹⁴
f_prediv
4
10
MHz
1 _{All values given are initial design targets and subject to change.}
2 _{Crystal and External reference frequency limits depend on device relying on PLL to lock prior to release of reset, default}
PREDIV/EPREDIV, MFD/EMFD default settings, and VCO frequency range. Absolute minimum loop frequency is 4 MHz.
3 _{Upper tolerance of less than 1% is allowed on 40MHz crystal.}
4 _{“Loss of Reference Frequency” is the reference frequency detected internally, which transitions the PLL into self clocked mode.}
5 _{Self clocked mode frequency is the frequency that the PLL operates at when the reference frequency falls below fLOR. This}
frequency is measured at D_CLKOUT. A default RFD value of (0x05) is used in SCM mode, and the programmed MFD and
RFD values have no effect
PXR40 Microcontroller Data Sheet, Rev. 1
66
Freescale Semiconductor