LPC2220 datasheet(23/50 Pages) NXP

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LPC2210_2220_6

Product data sheet

Rev. 06 — 11 December 2008

23 of 50

NXP Semiconductors

LPC2210/2220

16/32-bit ARM microcontrollers

6.9 External memory controller

The external static memory controller is a module which provides an interface between

the system bus and external (off-chip) memory devices. It provides support for up to four

independently conﬁgurable memory banks (16 MB each with byte lane enable control)

simultaneously. Each memory bank is capable of supporting SRAM, ROM, ﬂash EPROM,

burst ROM memory, or some external I/O devices.

Each memory bank may be 8-bit, 16-bit, or 32-bit wide.

6.10 General purpose parallel I/O

Device pins that are not connected to a speciﬁc peripheral function are controlled by the

GPIO registers. Pins may be dynamically conﬁgured as inputs or outputs. Separate

registers allow setting or clearing any number of outputs simultaneously. The value of the

output register may be read back, as well as the current state of the port pins.

6.10.1 Features

• Direction control of individual bits.

• Separate control of output set and clear.

• All I/O default to inputs after reset.

6.11 10-bit ADC

The LPC2210/2220 each contain a single 10-bit successive approximation ADC with eight

multiplexed channels.

6.11.1 Features

• Measurement range of 0 V to 3 V.

• Capable of performing more than 400000 10-bit samples per second.

• Burst conversion mode for single or multiple inputs.

Controls whether P3.0/A0 is a port pin (0) or an address line (1).

1 if BOOT1:0 = 00

at RESET = 0,

0 otherwise

Controls whether P3.1/A1 is a port pin (0) or an address line (1).

BOOT1 during

reset

27:25

Controls the number of pins among P3.23/A23/XCLK and P3[22:2]/A2[22:2] that

are address lines:

000 if

BOOT1:0 = 11 at

reset, 111

otherwise

000 = None

100 = A11 to A2 are address lines.

001 = A3 to A2 are address

lines.

101 = A15 to A2 are address lines.

010 = A5 to A2 are address

lines.

110 = A19 to A2 are address lines.

011 = A7 to A2 are address

lines.

111 = A23 to A2 are address lines.

31:28

reserved

Table 9.

Pin function select register 2 (PINSEL2 - 0xE002 C014) …continued

PINSEL2 bits

Description

Reset value

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