OM13006,598 NXP Semiconductors, OM13006,598 Datasheet - Page 17

• 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

NXP Semiconductors
UM10415
User manual
3.4.10 System PLL clock source update enable register
3.4.12 Main clock source update enable register
3.4.11 Main clock source select register
This register updates the clock source of the system PLL with the new input clock after the
SYSPLLCLKSEL register has been written to. In order for the update to take effect, first
write a zero to the SYSPLLUEN register and then write a one to SYSPLLUEN.
To successfully change clock sources, both clock sources must be running before
updating this register.
Table 13.
This register selects the main system clock which can be either any input to the system
PLL, the output from the system PLL (sys_pllclkout), or the watchdog or IRC oscillators
directly. The main system clock clocks the core, the peripherals, and the memories.
The MAINCLKUEN register (see
the update to take effect.
Remark: When switching clock sources, both clocks must be running before the clock
source can be updated.
Table 14.
This register updates the clock source of the main clock with the new input clock after the
MAINCLKSEL register has been written to. In order for the update to take effect, first write
a zero to the MAINCLKUEN register and then write a one to MAINCLKUEN.
To successfully change clock sources, both clock sources must be running before
updating this register.
Bit
0
31:1
Bit
1:0
31:2
Symbol
ENA
-
Symbol
SEL
-
System PLL clock source update enable register (SYSPLLUEN, address 0x4004
8044) bit description
Main clock source select register (MAINCLKSEL, address 0x4004 8070) bit
description
All information provided in this document is subject to legal disclaimers.
Value
00
01
10
11
-
Value
0
1
-
Rev. 1 — 10 September 2010
Description
Cock source for main clock
IRC oscillator
Input clock to system PLL
WDT oscillator
System PLL clock out
Reserved
Description
Enable system PLL clock source update
No change
Update clock source
Reserved
Section
3.4.12) must be toggled from LOW to HIGH for
Chapter 3: EM773 System configuration
UM10415
© NXP B.V. 2010. All rights reserved.
Reset value
0x00
0x00
Reset value
0x0
0x00
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