Jtag Port; Rtc - NEX ROBOTICS LPC2148 Pro Manual

Note: PWM channels 4 & 6 are multiplexed with UART1 RX and TX signals on
LPC2148 microcontroller. When PWM function is enabled on these pins do not insert
any jumper in the XBEE/UART header.
3.13

JTAG PORT

The LPC2148 development board has a 10pin (2X5) JTAG box header for on chip
debugging. JTAG debugging requires pulling P1.26 low on reset in order to enter into debug
mode. To achieve this there is a 2 pin jumper on the development board as shown in the
figure above.
3.14

RTC

The LPC2148 microcontroller features an in-built RTC and it provides Seconds, Minutes,
Hours, Day of Month, Month, Year, Day of Week, and Day of Year. It has a dedicated 32.768
kHz oscillator or programmable prescaler from VPB clock. It also has a dedicated power
supply pin that can be connected to a battery or to the board supply of 3.3V. LPC2148
development board has battery holder for providing battery back up to the internal RTC.
NEX Robotics Pvt. Ltd.
www.nex-robotics.com
LPC2148 DEVELOPMENT BOARD
50