Datasheet

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LPC408X_7X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 3.1 — 1 September 2014 48 of 138 NXP Semiconductors
LPC408x/7x
32-bit ARM Cortex-M4 microcontroller
P5[4] 206 C3 C4 143 100 - -
[3]
I; PU I/O P5[4] — General purpose digital input/output pin.
O U0_OE — RS-485/EIA-485 output enable signal for
UART0.
- R — Function reserved.
O T3_MAT3 — Match output for Timer 3, channel 3.
O U4_TXD — Transmitter output for USART4 (input/output
in smart card mode).
JTAG_TDO (SWO) 2 D3 B1 1 1 1 B2
[3]
O Test Data Out for JTAG interface. Also used as Serial wire
trace output.
JTAG_TDI 4C2C3322B1
[3]
I Test Data In for JTAG interface.
JTAG_TMS
(SWDIO)
6E3C2433C2
[3]
I Test Mode Select for JTAG interface. Also used as Serial
wire debug data input/output.
JTAG_TRST
8D1D4544C1
[3]
I Test Reset for JTAG interface.
JTAG_TCK
(SWDCLK)
10E2D2755D3
[3]
I Test Clock for JTAG interface. This clock must be slower
than 1 /6 of the CPU clock (CCLK) for the JTAG interface
to operate. Also used as serial wire clock.
RESET
35 M2 J1 24 17 14 G3
[12]
I External reset input with 20 ns glitch filter. A LOW-going
pulse as short as 50 ns on this pin resets the device,
causing I/O ports and peripherals to take on their default
states, and processor execution to begin at address 0.
This pin also serves as the debug select input. LOW level
selects the JTAG boundary scan. HIGH level selects the
ARM SWD debug mode.
RSTOUT
29 K3 H2 20 14 11 F1
[3]
O Reset status output. A LOW output on this pin indicates
that the device is in the reset state for any reason. This
reflects the RESET input pin and all internal reset sources.
RTC_ALARM 37 N1 H5 26 - - -
[13]
O RTC controlled output. This is a 1.8 V pin. It goes HIGH
when a RTC alarm is generated.
RTCX1 34K2 J2 2316 13 F2
[14]
[15]
I Input to the RTC 32 kHz ultra-low power oscillator circuit.
Table 3. Pin description
…continued
Not all functions are available on all parts. See Table 2 (Ethernet, USB, LCD, QEI, SD/MMC, comparator pins) and Table 5 (EMC pins).
Symbol
Pin LQFP208 Ball TFBGA208 Ball TFBGA180 Pin LQFP144 Pin LQFP100 Pin LQFP80 Pin TFBGA80 Reset state
[1]
Type
[2]
Description