OM13006,598 NXP Semiconductors, OM13006,598 Datasheet - Page 37
OM13006,598
Manufacturer Part Number
OM13006,598
Description
BOARD EVAL EM773 METER EU PLUG
Manufacturer
NXP Semiconductors
Type
Other Power Managementr
Specifications of OM13006,598
Design Resources
Plug Meter Schematics, Gerber Files USB Dongle Schematics, Gerber Files
Main Purpose
Power Management, Energy/Power Meter
Embedded
Yes, MCU, 32-Bit
Utilized Ic / Part
EM773FHN33,551
Interface Type
USB
Maximum Operating Temperature
+ 150 C
Operating Supply Voltage
1.8 V to 3.6 V
Product
Power Management Development Tools
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Primary Attributes
-
Secondary Attributes
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
EM773, OL2381
Other names
568-6681
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NXP Semiconductors
UM10415
User manual
3.9.4.1 Normal mode
3.9.4.2 Power-down mode
Table 39.
In normal mode the post divider is enabled, giving a 50% duty cycle clock with the
following frequency relations:
To select the appropriate values for M and P, it is recommended to follow these steps:
Table 40
SYSPLLCTRL register
system clock divider SYSAHBCLKDIV is set to one (see
Table 40.
In this mode, the internal current reference will be turned off, the oscillator and the
phase-frequency detector will be stopped and the dividers will enter a reset state. While in
Power-down mode, the lock output will be low, to indicate that the PLL is not in lock. When
the Power-down mode is terminated by setting the SYSPLL_PD bit to zero in the
Power-down configuration register
and will make the lock signal HIGH once it has regained lock on the input clock.
Parameter
FCLKIN
FCCO
FCLKOUT
P
M
PLL input
clock
sys_pllclkin
(Fclkin)
12 MHz
12 MHz
12 MHz
1. Specify the input clock frequency Fclkin.
2. Calculate M to obtain the desired output frequency Fclkout with M = F
3. Find a value so that FCCO = 2 × P × F
4. Verify that all frequencies and divider values conform to the limits specified in
shows how to configure the PLL for a 12 MHz crystal oscillator using the
PLL frequency parameters
PLL configuration examples
All information provided in this document is subject to legal disclaimers.
Main clock
(Fclkout)
48 MHz
36 MHz
24 MHz
System PLL
Frequency of sys_pllclkin (input clock to the system PLL) from the
SYSPLLCLKSEL multiplexer (see
Frequency of the Current Controlled Oscillator (CCO); 156 to 320 MHz.
Frequency of sys_pllclkout
System PLL post divider ratio; PSEL bits in SYSPLLCTRL (see
System PLL feedback divider register; MSEL bits in SYSPLLCTRL (see
Section
Fclkout
Rev. 1 — 10 September 2010
(Table
3.4.3).
=
6). The main clock is equivalent to the system clock if the
00011
00010
00001
MSEL bits
Table 6
M
×
(Table
Fclkin
37), the PLL will resume its normal operation
clkout
M divider
value
4
3
2
=
(
Chapter 3: EM773 System configuration
.
FCCO
Section
PSEL bits
Table 6
01
10
10
)
⁄
(
3.4.9).
Table
2
×
P
)
16).
P divider
value
2
4
4
UM10415
© NXP B.V. 2010. All rights reserved.
clkout
Section
FCCO
frequency
192 MHz
288 MHz
192 MHz
/ F
clkin
Table
3.4.3).
37 of 13
.
(1)
6.
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