![NXP Semiconductors LPC43Sxx Скачать руководство пользователя страница 422](http://html1.mh-extra.com/html/nxp-semiconductors/lpc43sxx/lpc43sxx_user-manual_1721827422.webp)
UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
422 of 1441
NXP Semiconductors
UM10503
Chapter 17: LPC43xx/LPC43Sxx System Control Unit (SCU)/ IO
17.4.3 Pin configuration registers for high-speed pins
Each digital pin and each clock pin on the LPC43xx/LPC43Sxx have an associated pin
configuration register which determines the pin’s function and electrical characteristics.
The assigned functions for each pin are listed in
.
This register controls the following pins: P3_3 and pins CLK0 to CLK3.
17.4.4 Pin configuration register for USB1 pins USB1_DP/USB1_DM
Remark:
The USB_ESEA bit must be set to one to use USB1.
Table 194. Pin configuration registers for high-speed pins (SFS, address 0x4008 618C
(SPSP3_3); 0x4008 6C00 (SFSCLK0) to 0x4008 6C0C (SFSCLK3)) bit description
Bit
Symbol
Value
Description
Reset
value
Access
2:0
MODE
Select pin function.
0
R/W
0x0
Function 0 (default)
0x1
Function 1
0x2
Function 2
0x3
Function 3
0x4
Function 4
0x5
Function 5
0x6
Function 6
0x7
Function 7
3
EPD
Enable pull-down resistor at pad.
0
R/W
0
Disable pull-down.
1
Enable pull-down. Enable both pull-down
resistor and pull-up resistor for repeater
mode.
4
EPUN
Disable pull-up resistor at pad. By default,
the pull-up resistor is enabled at reset.
0
R/W
0
Enable pull-up. Enable both pull-down
resistor and pull-up resistor for repeater
mode.
1
Disable pull-up.
5
EHS
Slew rate
0
R/W
0
Fast (low noise with fast speed)
1
High-speed (medium noise with high speed)
6
EZI
Input buffer enable. The input buffer is
disabled by default at reset and must be
enabled for receiving.
0
R/W
0
Disable input buffer
1
Enable input buffer
7
ZIF
Input glitch filter. Disable the input glitch filter
for clocking signals higher than 30 MHz.
0
R/W
0
Enable input filter
1
Disable input filter
31:8
-
Reserved
-
-