LPC2468FET208,551 NXP Semiconductors, LPC2468FET208,551 Datasheet - Page 47
LPC2468FET208,551
Manufacturer Part Number
LPC2468FET208,551
Description
IC ARM7 MCU FLASH 512K 208TFBGA
Manufacturer
NXP Semiconductors
Series
LPC2400r
Specifications of LPC2468FET208,551
Program Memory Type
FLASH
Program Memory Size
512KB (512K x 8)
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
98K 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/I2S/ISP/SSP/UART/USB
Maximum Clock Frequency
72 MHz
Number Of Programmable I/os
160
Number Of Timers
6
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2, IRD-LPC2468-DEV, SAB-TFBGA208, KSK-LPC2468-PL
Development Tools By Supplier
OM10100
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
On-chip Dac
1-ch x 10-bit
Package
208TFBGA
Device Core
ARM7TDMI-S
Family Name
LPC2000
Maximum Speed
72 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
622-1025 - KIT DEV IND REF DESIGN LPC2468622-1024 - BOARD SCKT ADAPTER FOR TFBGA208568-4358 - DISPLAY QVGA TFT FOR OM10100568-4309 - BOARD EXTENSION LPCSTICK568-4308 - EVAL LPC-STICK WITH LPC2468MCB2400U - BOARD EVAL MCB2400 + ULINK2MCB2400 - BOARD EVAL FOR NXP LPC246X SER622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4262
935283234551
LPC2468FET208-S
935283234551
LPC2468FET208-S
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UM10237_4
User manual
Fig 14. PLL block diagram (N = 16, M = 125, USBSEL = 6, CCLKSEL = 4)
pllclkin =
18.432 MHz
PLLC
PLLE
NSEL[23:16]
MSEL[14:0]
pd
3.2.1 PLL operation
N-DIVIDER
The PLL input, in the range of 32 kHZ to 24 MHz, may initially be divided down by a value
"N", which may be in the range of 1 to 256. This input division provides a greater number
of possibilities in providing a wide range of output frequencies from the same input
frequency.
Following the PLL input divider is the PLL multiplier. The multiplier can multiply the input
divider output through the use of a Current Controlled Oscillator (CCO) by a value "M", in
the range of 1 through 32768. The resulting frequency must be in the range of 275 MHz to
550 MHz. The multiplier works by dividing the CCO output by the value of M, then using a
phase-frequency detector to compare the divided CCO output to the multiplier input. The
error value is used to adjust the CCO frequency.
There are additional dividers at the PLL output to bring the frequency down to what is
needed for the CPU, USB, and other peripherals. The PLL output dividers are described
in the Clock Dividers section following the PLL description. A block diagram of the PLL is
shown in
PLL activation is controlled via the PLLCON register. The PLL multiplier and divider
values are controlled by the PLLCFG register. These two registers are protected in order
to prevent accidental alteration of PLL parameters or deactivation of the PLL. Since all
chip operations, including the Watchdog Timer, could be dependent on the PLL if so
configured (for example when it is providing the chip clock), accidental changes to the PLL
setup could result in unexpected or fatal behavior of the microcontroller. The protection is
accomplished by a feed sequence similar to that of the Watchdog Timer. Details are
provided in the description of the PLLFEED register.
The PLL is turned off and bypassed following a chip Reset and by entering Power-down
mode. PLL is enabled by software only.
It is important that the setup procedure described in
sequence”
/16
1.152 MHz
Figure 4–14
is followed as is or the PLL might not operate at all!.
refclk =
1.152 MHz
M-DIVIDER
FREQUENCY
DETECTOR
/125
PHASE-
Rev. 04 — 26 August 2009
PLOCK
144 MHz
FILTER
/2
Chapter 4: LPC24XX Clocking and power control
288 MHz
CCO
288
MHz
Section 4–3.2.14 “PLL setup
pllclk =
288 MHz
CCLKSEL[7:0]
USBSEL[3:0]
DIVIDER
DIVIDER
CLOCK
CLOCK
UM10237
USB
CPU
© NXP B.V. 2009. All rights reserved.
/6
/4
usbclk =
48 MHz
cclk =
72 MHz
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