LPC2158 NXP Semiconductors, LPC2158 Datasheet - Page 9

• Manufacturer Part Number: LPC2158
• Description: Single-chip 16-bit/32-bit microcontrollers; 512 kB fash
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 2.
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[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
LPC2157_2158_2
Product data sheet
Symbol
RESET
XTAL1
XTAL2
RTCX1
RTCX2
V
V
V
V
V
VREF
VBAT
SDA_LCD
SCL_LCD
SYNC
CLK
BP0 to BP3
S0 to S31
SS
DD
DDA
DD(LCD)
LCD
5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis and 10 ns slew rate control.
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.
Open-drain 5 V tolerant digital I/O I
functionality.
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 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.
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 .
Pad is designed in accordance with the Universal Serial Bus (USB) specification, revision 2.0 (Full-speed and Low-speed mode only).
5 V tolerant pad providing digital input (with TTL levels and hysteresis) function only.
Pad provides special analog functionality.
Pin description LPC2157
Pin
83
88
87
93
94
6, 13, 32,
39, 40,
85, 95
11, 27, 33 I
96
38
41
89
31
34
35
36
37
42 to 45
46 to 77
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Type
I
O
I
I
O
I
I
I
I
I
I
I/O
I
I/O
I/O
O
O
2
C-bus 400 kHz specification compatible pad. It requires external pull-up to provide an output
…continued
Description
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 from the oscillator amplifier.
Output to the oscillator circuit and internal clock generator circuits.
Input to the RTC oscillator circuit.
Output from the RTC oscillator circuit.
Ground: 0 V reference.
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
used to power the on-chip ADC(s) and DAC.
1.8 V to 5.5 V power supply: Power supply voltage for the PCF8576D.
LCD power supply: LCD voltage.
ADC reference voltage: This should be nominally less than or equal to the
V
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.
SDA LCD — I
SCL LCD — I
SYNC — cascade synchronization input/output
CLK — external clock input/output
BP0 to BP3: LCD backplane outputs.
S0 to S31: LCD segment outputs.
DD
DD
Rev. 02 — 9 February 2009
but should be isolated to minimize noise and error. This voltage is only
voltage but should be isolated to minimize noise and error. Level on this
2
2
C-bus clock signal for the LCD controller.
C-bus data signal for the LCD controller.
Single-chip 16-bit/32-bit microcontrollers
LPC2157/2158
© NXP B.V. 2009. All rights reserved.
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