LPC2387FBD100,551 NXP Semiconductors, LPC2387FBD100,551 Datasheet - Page 29

• Manufacturer Part Number: LPC2387FBD100,551
• Description: IC ARM7 MCU FLASH 512K 100LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC2300r

Specifications of LPC2387FBD100,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 100-LQFP
• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 72MHz
• Connectivity: CAN, 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: 70
• Ram Size: 98K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 6x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC23
• Core: ARM7TDMI-S
• Data Bus Width: 16 bit, 32 bit
• Data Ram Size: 98 KB
• Interface Type: CAN/I2C/I2S/SSP/UART/USB
• Maximum Clock Frequency: 72 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, MCB2387, MCB2387U, MCB2387UME
• Development Tools By Supplier: OM11013
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 6-ch x 10-bit
• On-chip Dac: 1-ch x 10-bit
• Cpu Family: LPC2000
• Device Core: ARM7TDMI-S
• Device Core Size: 16/32Bit
• Frequency (max): 72MHz
• Total Internal Ram Size: 98KB
• # I/os (max): 70
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 568-4359 - BOARD EVAL FOR LPC2387568-4310 - EVAL BOARD LPC2158 W/LCD568-3999 - BOARD EVAL FOR LPC23 ARM MCU622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 568-4322; 935284932551; LPC2387FBD100-S

NXP Semiconductors
LPC2387
Product data sheet
7.24.3 Wake-up timer
7.24.4 Power control
The PLL input, in the range of 32 kHz to 25 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 wide range of
output frequencies from the same input frequency.
Following the PLL input divider is the PLL multiplier. This 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.
The PLL is turned off and bypassed following a chip Reset and by entering Power-down
mode. PLL is enabled by software only. The program must configure and activate the PLL,
wait for the PLL to Lock, then connect to the PLL as a clock source.
The LPC2387 begins operation at power-up and when awakened from Power-down and
Deep power-down modes by using the 4 MHz IRC oscillator as the clock source. This
allows chip operation to resume quickly. If the main oscillator or the PLL is needed by the
application, software will need to enable these features and wait for them to stabilize
before they are used as a clock source.
When the main oscillator is initially activated, the wake-up timer allows software to ensure
that the main oscillator is fully functional before the processor uses it as a clock source
and starts to execute instructions. This is important at power on, all types of Reset, and
whenever any of the aforementioned functions are turned off for any reason. Since the
oscillator and other functions are turned off during Power-down and Deep power-down
modes, any wake-up of the processor from Power-down mode makes use of the wake-up
Timer.
The Wake-up Timer monitors the crystal oscillator to check whether it is safe to begin
code execution. When power is applied to the chip, or when some event caused the chip
to exit Power-down mode, some time is required for the oscillator to produce a signal of
sufficient amplitude to drive the clock logic. The amount of time depends on many factors,
including the rate of V
electrical characteristics (if a quartz crystal is used), as well as any other external circuitry
(e.g., capacitors), and the characteristics of the oscillator itself under the existing ambient
conditions.
The LPC2387 supports a variety of power control features. There are four special modes
of processor power reduction: Idle mode, Sleep mode, Power-down, and Deep
power-down mode. The CPU clock rate may also be controlled as needed by changing
clock sources, reconfiguring PLL values, and/or altering the CPU clock divider value. This
allows a trade-off of power versus processing speed based on application requirements.
In addition, Peripheral Power Control allows shutting down the clocks to individual on-chip
peripherals, allowing fine tuning of power consumption by eliminating all dynamic power
use in any peripherals that are not required for the application. Each of the peripherals
has its own clock divider which provides even better power control.
All information provided in this document is subject to legal disclaimers.
DD(3V3)
Rev. 4 — 10 February 2011
ramp (in the case of power on), the type of crystal and its
Single-chip 16-bit/32-bit MCU
LPC2387
© NXP B.V. 2011. All rights reserved.
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