Datasheet

Product data sheet Rev. 1 — 19 February 2014 22 of 99

NXP Semiconductors

LPC15xx

32-bit ARM Cortex-M3 microcontroller

8.3 On-chip flash programming memory

The LPC15xx contain up to 256 kB on-chip flash program memory. The flash can be

programmed using In-System Programming (ISP) or In-Application Programming (IAP)

via the on-chip boot loader software. Flash updates via USB are supported as well.

The flash memory is divided into 4 kB sectors with each sector consisting of 16 pages.

Individual pages of 256 byte each can be erased using the IAP erase page command.

8.3.1 ISP pin configuration

The LPC15xx supports ISP via the USART0, C_CAN, or USB interfaces. The ISP mode is

determined by the state of two pins (ISP_0 and ISP_1) at boot time:

The ISP pin assignment is different for each package, so that the fewest functions

possible are blocked. No more than four pins must be set aside for entering ISP in any

ISP mode. The boot code assigns two ISP pins for each package, which are probed when

the part boots to determine whether or not to enter ISP mode. Once the ISP mode has

been determined, the boot loader configures the necessary serial pins for each package.

Pins which are not configured by the boot loader for the selected boot mode (for example

CAN0_RD and CAN0_TD in USART mode) can be assigned to any function through the

switch matrix.

8.4 EEPROM

The LPC15xx contain 4 kB of on-chip byte-erasable and byte-programmable EEPROM

data memory. The EEPROM can be programmed using In-Application Programming (IAP)

via the on-chip boot loader software.

Table 6. ISP modes

Boot mode ISP_0 ISP_1 Description

No ISP HIGH HIGH ISP bypassed. Part attempts to boot

from flash. If the user code in flash is

not valid, then enters ISP via USB.

C_CAN HIGH LOW Part enters ISP via C_CAN.

USB LOW HIGH Part enters ISP via USB.

USART0 LOW LOW Part enters ISP via USART0.

Table 7. Pin assignments for ISP modes

Boot pin LQFP48 LQFP64 LQFP100

ISP_0 PIO0_4 PIO1_9 PIO2_5

ISP_1 PIO0_16 PIO1_11 PIO2_4

USART mode

U0_TXD PIO0_15 PIO0_18 PIO2_6

U0_RXD PIO0_14 PIO0_13 PIO2_7

C_CAN mode

CAN0_TD PIO0_18 PIO0_31 PIO2_8

CAN0_RD PIO0_13 PIO0_11 PIO2_9

USB mode

USB_VBUS (same as ISP_1) PIO0_16 PIO1_11 PIO2_4