參數(shù)資料
型號： LPC2148
廠商： NXP Semiconductors N.V.
英文描述： Single-chip 16-bit/32-bit microcontrollers; up to 512 kB flash with ISP/IAP, USB 2.0 full-speed device, 10-bit ADC and DAC
中文描述： 單芯片16-bit/32-bit微控制器，高達(dá)512的ISP /國際檢察官聯(lián)合會的USB 2.0全速設(shè)備，10位ADC和DAC kB閃存
文件頁數(shù)： 11/38頁
文件大小： 193K
代理商： LPC2148
9397 750 14985
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Preliminary data sheet
Rev. 01 — 3 October 2005
11 of 38
Philips Semiconductors
LPC2141/42/44/46/48
Single-chip 16-bit/32-bit microcontrollers
[1]
5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis and 10 ns slew rate control.
[2]
5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis and 10 ns slew rate control. If configured for an input
function, this pad utilizes built-in glitch filter that blocks pulses shorter than 3 ns.
[3]
Open-drain 5 V tolerant digital I/O I
2
C-bus 400 kHz specification compatible pad. It requires external pull-up to provide an output
functionality.
[4]
5 V tolerant pad providing digital I/O (with TTL levels and hysteresis and 10 ns slew rate control) and analog input function. If configured
for an input function, this pad utilizes built-in glitch filter that blocks pulses shorter than 3 ns. When configured as an ADC input, digital
section of the pad is disabled.
[5]
5 V tolerant pad providing digital I/O (with TTL levels and hysteresis and 10 ns slew rate control) and analog output function. When
configured as the DAC output, digital section of the pad is disabled.
[6]
5 V tolerant pad with built-in pull-up resistor providing digital I/O functions with TTL levels and hysteresis and 10 ns slew rate control.
The pull-up resistor’s value typically ranges from 60 k
to 300 k
.
[7]
Pad is designed in accordance with the Universal Serial Bus (USB) specification, revision 2.0 (Full-speed and Low-speed mode only).
[8]
5 V tolerant pad providing digital input (with TTL levels and hysteresis) function only.
[9]
Pad provides special analog functionality.
P1.28/TDI
60
[6]
I/O
I
I/O
I
I/O
I
I/O
I
I/O
I/O
I
P1.28 —
General purpose input/output digital pin (GPIO).
TDI —
Test Data in for JTAG interface.
P1.29 —
General purpose input/output digital pin (GPIO).
TCK —
Test Clock for JTAG interface.
P1.30 —
General purpose input/output digital pin (GPIO).
TMS —
Test Mode Select for JTAG interface.
P1.31 —
General purpose input/output digital pin (GPIO).
TRST —
Test Reset for JTAG interface.
USB bidirectional D+ line.
USB bidirectional D
line.
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.
P1.29/TCK
56
[6]
P1.30/TMS
52
[6]
P1.31/TRST
20
[6]
D+
D
RESET
10
[7]
11
[7]
57
[8]
XTAL1
XTAL2
RTXC1
RTXC2
V
SS
62
[9]
61
[9]
3
[9]
5
[9]
6, 18, 25, 42,
50
59
I
O
I
O
I
V
SSA
I
Analog ground:
0 V reference. This should nominally be the same voltage
as V
SS
, but should be isolated to minimize noise and error.
3.3 V power supply:
This is the power supply voltage for the core and I/O
ports.
Analog 3.3 V power supply:
This should be nominally the same voltage as
V
DD
but should be isolated to minimize noise and error. This voltage is only
used to power the on-chip ADC(s) and DAC.
A/D converter reference voltage:
This should be nominally less than or
equal to the V
DD
voltage but should be isolated to minimize noise and error.
Level on this pin is used as a reference for ADC(s) and DAC.
RTC power supply voltage:
3.3 V on this pin supplies the power to the RTC.
V
DD
23, 43, 51
I
V
DDA
7
I
VREF
63
I
VBAT
49
I
Table 3:
Symbol
Pin description
…continued
Pin
Type
Description
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