lpc2377 NXP Semiconductors, lpc2377 Datasheet - Page 14

• Manufacturer Part Number: lpc2377
• Description: Single-chip 16-bit/32-bit Microcontroller; 512 Kb ?ash With Isp/iap, Ethernet, Usb 2.0, Can, And 10-bit Adc/dac
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 3.
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
LPC2377_78_4
Product data sheet
Symbol
RTCK
RSTOUT
RESET
XTAL1
XTAL2
RTCX1
RTCX2
V
V
V
n.c.
V
V
VREF
VBAT
SS
SSA
DD(3V3)
DD(DCDC)(3V3)
DDA
5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis.
5 V tolerant pad providing digital I/O functions (with TTL levels and hysteresis) and analog input. When configured as a DAC input,
digital section of the pad is disabled.
5 V tolerant pad providing digital I/O with TTL levels and hysteresis and analog output function. When configured as the DAC output,
digital section of the pad is disabled.
Open-drain, 5 V tolerant digital I/O pad compatible with I
functionality. When power is switched off, this pin connected to the I
configuration applies to all functions on this pin.
Pad provides digital I/O and USB functions (LPC2378 only). It is designed in accordance with the USB specification, revision 2.0
(Full-speed and Low-speed mode only).
5 V tolerant pad with 5 ns glitch filter providing digital I/O functions with TTL levels and hysteresis.
5 V tolerant pad with 20 ns glitch filter providing digital I/O function with TTL levels and hysteresis.
Pad provides special analog functionality.
Pad provides special analog functionality.
Pin description
Pin
143
20
24
31
33
23
25
22, 44,
59, 65,
79, 103,
117,119,
139
15
41, 62,
77, 102,
114,
138
21, 81,
98
18, 60,
121
14
17
27
[7]
[8]
[8]
[8]
[8]
[10]
[12]
[14]
[14]
[14]
[1]
[9]
[11]
[13]
…continued
Type
I/O
O
I
I
O
I
O
I
I
I
I
I
I
I
I
Description
RTCK — JTAG interface control signal.
Note: LOW on this pin while RESET is LOW enables ETM pins (P2[9:0]) to operate
as Trace port after reset.
RSTOUT — This is a 3.3 V pin. LOW on this pin indicates LPC2377/78 being in
Reset state.
external reset input: A LOW on this pin resets the device, causing I/O ports and
peripherals to take on their default states, and processor execution to begin at
address 0. TTL with hysteresis, 5 V tolerant.
Input to the oscillator circuit and internal clock generator circuits.
Output from the oscillator amplifier.
Input to the RTC oscillator circuit.
Output from the RTC oscillator circuit.
ground: 0 V reference.
analog ground: 0 V reference. This should nominally be the same voltage as V
but should be isolated to minimize noise and error.
3.3 V supply voltage: This is the power supply voltage for the I/O ports.
Leave these pins unconnected.
3.3 V DC-to-DC converter supply voltage: This is the power supply for the on-chip
DC-to-DC converter only.
analog 3.3 V pad supply voltage: This should be nominally the same voltage as
V
power the ADC and DAC.
ADC reference: This should be nominally the same voltage as V
be isolated to minimize noise and error. The level on this pin is used as a reference
for ADC and DAC.
RTC pin power supply: 3.3 V on this pin supplies the power to the RTC peripheral.
DD(3V3)
Rev. 04 — 19 November 2008
but should be isolated to minimize noise and error. This voltage is used to
2
C-bus 400 kHz specification. It requires an external pull-up to provide output
2
C-bus is floating and does not disturb the I
Single-chip 16-bit/32-bit microcontroller
LPC2377/78
2
C lines. Open-drain
© NXP B.V. 2008. All rights reserved.
DD(3V3)
but should
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SS
,