Datasheet

LPC2458 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 4.1 — 15 October 2013 16 of 81
NXP Semiconductors
LPC2458
Single-chip 16-bit/32-bit micro
P2[20]/DYCS0 P6
[1]
I/O P2[20] — General purpose digital input/output pin.
O DYCS0
— SDRAM chip select 0.
P2[21]/DYCS1
N8
[1]
I/O P2[21] — General purpose digital input/output pin.
O DYCS1
— SDRAM chip select 1.
P2[24]/
CKEOUT0
P1
[1]
I/O P2[24] — General purpose digital input/output pin.
O CKEOUT0 — SDRAM clock enable 0.
P2[25]/
CKEOUT1
P2
[1]
I/O P2[25] — General purpose digital input/output pin.
O CKEOUT1 — SDRAM clock enable 1.
P2[28]/
DQMOUT0
M2
[1]
I/O P2[28] — General purpose digital input/output pin.
O DQMOUT0 — Data mask 0 used with SDRAM and static devices.
P2[29]/
DQMOUT1
L1
[1]
I/O P2[29] — General purpose digital input/output pin.
O DQMOUT1 — Data mask 1 used with SDRAM and static devices.
P3[0] to P3[31] I/O Port 3: Port 3 is a 32-bit I/O port with individual direction controls for each bit. The
operation of port 3 pins depends upon the pin function selected via the Pin
Connect block.
Pins P3[16:22] and P3[27:31] are not available.
P3[0]/D0 D6
[1]
I/O P3[0] — General purpose digital input/output pin.
I/O D0 — External memory data line 0.
P3[1]/D1 E6
[1]
I/O P3[1] — General purpose digital input/output pin.
I/O D1 — External memory data line 1.
P3[2]/D2 A2
[1]
I/O P3[2] — General purpose digital input/output pin.
I/O D2 — External memory data line 2.
P3[3]/D3 G5
[1]
I/O P3[3] — General purpose digital input/output pin.
I/O D3 — External memory data line 3.
P3[4]/D4 D3
[1]
I/O P3[4] — General purpose digital input/output pin.
I/O D4 — External memory data line 4.
P3[5]/D5 E3
[1]
I/O P3[5] — General purpose digital input/output pin.
I/O D5 — External memory data line 5.
P3[6]/D6 F4
[1]
I/O P3[6] — General purpose digital input/output pin.
I/O D6 — External memory data line 6.
P3[7]/D7 G3
[1]
I/O P3[7] — General purpose digital input/output pin.
I/O D7 — External memory data line 7.
P3[8]/D8 A6
[1]
I/O P3[8] — General purpose digital input/output pin.
I/O D8 — External memory data line 8.
P3[9]/D9 A4
[1]
I/O P3[9] — General purpose digital input/output pin.
I/O D9 — External memory data line 9.
P3[10]/D10 B3
[1]
I/O P3[10] — General purpose digital input/output pin.
I/O D10 — External memory data line 10.
P3[11]/D11 B2
[1]
I/O P3[11] — General purpose digital input/output pin.
I/O D11 — External memory data line 11.
Table 4. Pin description
…continued
Symbol Ball Type Description