LPC2210 datasheet(19/39 Pages) PHILIPS

19 / 39 page

Philips Semiconductors

LPC2210

16/32-bit ARM microcontrollers with external memory interface

Preliminary data

Rev. 01 — 09 February 2004

19 of 39

9397 750 12872

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 MBytes each with byte

lane enable control) simultaneously. Each memory banks is capable of supporting

SRAM, ROM, Flash EPROM, Burst ROM memory, or some external I/O devices.

Each memory bank may be 8, 16, or 32 bits 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.

19:18

Reserved.

If bits 5:4 are not 10, controls the use of pin P2.29:28: 0 enables P2.29:28, 1 is

reserved

If bits 5:4 are not 10, controls the use of pin P2.30: 0 enables P2.30, 1 enables

AIN4.

If bits 5:4 are not 10, controls the use of pin P2.31: 0 enables P2.31, 1 enables

AIN5.

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 = A11:2 are address lines.

001 = A3:2 are address

lines.

101 = A15:2 are address lines.

010 = A5:2 are address

lines.

110 = A19:2 are address lines.

011 = A7:2 are address

lines.

111 = A23:2 are address lines.

31:28

Reserved.

Table 8:

Pin function select register 2 (PINSEL2 - 0xE002C014)…continued

PINSEL2 bits

Description

Reset value

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