LPC1769FBD100,551 NXP Semiconductors, LPC1769FBD100,551 Datasheet - Page 46

• Manufacturer Part Number: LPC1769FBD100,551
• Description: IC ARM CORTEX MCU 512K 100-LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC17xxr

Specifications of LPC1769FBD100,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 100-LQFP
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 120MHz
• Connectivity: CAN, Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 70
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 8x12b, D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC17
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Data Ram Size: 64 KB
• Interface Type: Ethernet, USB, OTG, CAN
• Maximum Clock Frequency: 120 MHz
• Number Of Programmable I/os: 70
• Number Of Timers: 4
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2, MCB1760, MCB1760U, MCB1760UME
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• On-chip Dac: 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4966; 935290522551

NXP Semiconductors
UM10360
User manual
4.5.13 PLL0 setup sequence
The following sequence must be followed step by step in order to have PLL0 initialized
and running:
It is very important not to merge any steps above. For example, do not update the
PLL0CFG and enable PLL0 simultaneously with the same feed sequence.
1. Disconnect PLL0 with one feed sequence if PLL0 is already connected.
2. Disable PLL0 with one feed sequence.
3. Change the CPU Clock Divider setting to speed up operation without PLL0, if desired.
4. Write to the Clock Source Selection Control register to change the clock source if
5. Write to the PLL0CFG and make it effective with one feed sequence. The PLL0CFG
6. Enable PLL0 with one feed sequence.
7. Change the CPU Clock Divider setting for the operation with PLL0. It is critical to do
8. Wait for PLL0 to achieve lock by monitoring the PLOCK0 bit in the PLL0STAT register,
9. Connect PLL0 with one feed sequence.
needed.
can only be updated when PLL0 is disabled.
this before connecting PLL0.
or using the PLOCK0 interrupt, or wait for a fixed time when the input clock to PLL0 is
slow (i.e. 32 kHz). The value of PLOCK0 may not be stable when the PLL reference
frequency (FREF, the frequency of REFCLK, which is equal to the PLL input
frequency divided by the pre-divider value) is less than 100 kHz or greater than
20 MHz. In these cases, the PLL may be assumed to be stable after a start-up time
has passed. This time is 500 µs when FREF is greater than 400 kHz and 200 / FREF
seconds when FREF is less than 400 kHz.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 19 August 2010
Chapter 4: LPC17xx Clocking and power control
UM10360
© NXP B.V. 2010. All rights reserved.
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