LPC2460FET208,551 NXP Semiconductors, LPC2460FET208,551 Datasheet - Page 53
LPC2460FET208,551
Manufacturer Part Number
LPC2460FET208,551
Description
IC ARM7 MCU ROMLESS 208TFBGA
Manufacturer
NXP Semiconductors
Series
LPC2400r
Specifications of LPC2460FET208,551
Program Memory Type
ROMless
Package / Case
208-TFBGA
Core Processor
ARM7
Core Size
16/32-Bit
Speed
72MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, Microwire, MMC, SPI, SSI, SSP, UART/USART, USB OTG
Peripherals
Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Number Of I /o
160
Ram Size
96K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
LPC24
Core
ARM7TDMI-S
Data Bus Width
16 bit, 32 bit
Data Ram Size
98 KB
Interface Type
CAN/I2C/I2S/SPI/SSP/UART/USB
Maximum Clock Frequency
72 MHz
Number Of Programmable I/os
160
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, MCB2460, MCB2460U
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
On-chip Dac
1-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
MCB2400U - BOARD EVAL MCB2400 + ULINK2MCB2400 - BOARD EVAL FOR NXP LPC246X SER
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4260
935283232551
LPC2460FET208-S
935283232551
LPC2460FET208-S
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC2460FET208,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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NXP Semiconductors
UM10237_4
User manual
3.2.10 PLL and Power-down mode
3.2.11 PLL frequency calculation
3.2.9 PLL Feed register (PLLFEED - 0xE01F C08C)
A correct feed sequence must be written to the PLLFEED register in order for changes to
the PLLCON and PLLCFG registers to take effect. The feed sequence is:
The two writes must be in the correct sequence, and must be consecutive APB bus
cycles. The latter requirement implies that interrupts must be disabled for the duration of
the PLL feed operation. If either of the feed values is incorrect, or one of the previously
mentioned conditions is not met, any changes to the PLLCON or PLLCFG register will not
become effective.
Table 49.
Power-down mode automatically turns off and disconnects the PLL. Wakeup from
Power-down mode does not automatically restore the PLL settings, this must be done in
software. Typically, a routine to activate the PLL, wait for lock, and then connect the PLL
can be called at the beginning of any interrupt service routine that might be called due to
the wakeup. It is important not to attempt to restart the PLL by simply feeding it when
execution resumes after a wakeup from Power-down mode. This would enable and
connect the PLL at the same time, before PLL lock is established.
The PLL equations use the following parameters:
Table 50.
The PLL output frequency (when the PLL is both active and connected) is given by:
F
The PLL inputs and settings must meet the following:
The PLL equation can be solved for other PLL parameters:
Bit
7:0
Parameter
F
F
N
M
F
1. Write the value 0xAA to PLLFEED.
2. Write the value 0x55 to PLLFEED.
CCO
•
•
IN
CCO
REF
F
F
IN
CCO
= (2 × M × F
Symbol
PLLFEED The PLL feed sequence must be written to this register in order for
is in the range of 32 kHz to 50 MHz.
is in the range of 275 MHz to 550 MHz.
PLL Feed register (PLLFEED - address 0xE01F C08C) bit description
PLL frequency parameter
IN
Description
the frequency of pllclkin from the Clock Source Selection Multiplexer.
the frequency of the pllclk (output of the PLL Current Controlled Oscillator)
PLL Pre-divider value from the NSEL bits in the PLLCFG register (PLLCFG
NSEL field + 1). N is an integer from 1 through 32.
PLL Multiplier value from the MSEL bits in the PLLCFG register (PLLCFG
MSEL field + 1). Not all potential values are supported. See below.
PLL internal reference frequency, FIN divided by N.
Description
PLL configuration and control register changes to take effect.
) / N
Rev. 04 — 26 August 2009
Chapter 4: LPC24XX Clocking and power control
UM10237
© NXP B.V. 2009. All rights reserved.
53 of 792
Reset
value
0x00
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