LPC2361FBD100,551 NXP Semiconductors, LPC2361FBD100,551 Datasheet - Page 27

• Manufacturer Part Number: LPC2361FBD100,551
• Description: IC ARM7 MCU FLASH 64K 100LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC2300r

Specifications of LPC2361FBD100,551

• Program Memory Type: FLASH
• Program Memory Size: 64KB (64K x 8)
• Package / Case: 100-LQFP
• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 72MHz
• Connectivity: CAN, I²C, Microwire, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 70
• Ram Size: 34K 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: 34 KB
• Interface Type: CAN/I2S/SPI/SSP/USB
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 70
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 6-ch x 10-bit
• On-chip Dac: 1-ch x 10-bit
• Package: 100LQFP
• Device Core: ARM7TDMI-S
• Family Name: LPC2000
• Maximum Speed: 72 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 568-4310 - EVAL BOARD LPC2158 W/LCDMCB2360UME - BOARD EVAL MCB2360 + ULINK-MEMCB2360U - BOARD EVAL MCB2360 + ULINK2568-4014 - BOARD EVAL FOR LPC236X ARM568-3999 - BOARD EVAL FOR LPC23 ARM MCU
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4525; 935286991551

NXP Semiconductors
LPC2361_62_4
Product data sheet
7.23.1.1 Internal RC oscillator
7.23.1.2 Main oscillator
7.23.1.3 RTC oscillator
7.23.2 PLL
Following reset, the LPC2361/2362 will operate from the Internal RC oscillator until
switched by software. This allows systems to operate without any external crystal and the
bootloader code to operate at a known frequency.
The IRC may be used as the clock source for the WDT, and/or as the clock that drives the
PLL and subsequently the CPU. The nominal IRC frequency is 4 MHz. The IRC is
trimmed to 1 % accuracy.
Upon power-up or any chip reset, the LPC2361/2362 uses the IRC as the clock source.
Software may later switch to one of the other available clock sources.
The main oscillator can be used as the clock source for the CPU, with or without using the
PLL. The main oscillator operates at frequencies of 1 MHz to 25 MHz. This frequency can
be boosted to a higher frequency, up to the maximum CPU operating frequency, by the
PLL. The clock selected as the PLL input is PLLCLKIN. The ARM processor clock
frequency is referred to as CCLK elsewhere in this document. The frequencies of
PLLCLKIN and CCLK are the same value unless the PLL is active and connected. The
clock frequency for each peripheral can be selected individually and is referred to as
PCLK. Refer to
The RTC oscillator can be used as the clock source for the RTC and/or the WDT. Also, the
RTC oscillator can be used to drive the PLL and the CPU.
The PLL accepts an input clock frequency in the range of 32 kHz to 25 MHz. The input
frequency is multiplied up to a high frequency, then divided down to provide the actual
clock used by the CPU and the USB block.
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.
Section 7.23.2
Rev. 04 — 4 March 2010
for additional information.
Single-chip 16-bit/32-bit MCU
LPC2361/62
© NXP B.V. 2010. All rights reserved.
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