LPC1837FET256,551 NXP Semiconductors, LPC1837FET256,551 Datasheet - Page 78

• Manufacturer Part Number: LPC1837FET256,551
• Description: Microcontrollers (MCU) 32BIT ARM CORTEX-M3 MCU 136KB SRAM
• Manufacturer: NXP Semiconductors
• Series: LPC18xxr

Specifications of LPC1837FET256,551

• Core: ARM Cortex M3
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 150MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, Microwire, SD/MMC, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 80
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 136K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 256-LBGA
• Lead Free Status / Rohs Status: Details
• Other names: 935293795551

NXP Semiconductors
Table 21.
LPC1850_30_20_10
Objective data sheet
External
pin
LCDVD0
LCDLP
LCDENAB/
LCDM
LCDFP
LCDDCLK
LCDLE
LCDPWR
GP_CLKIN PF_4
LCD panel connections for TFT panels
TFT 12 bit (4:4:4 mode) TFT 16 bit (5:6:5 mode)
LPC18xx
pin used
-
P7_6
P4_6
P4_5
P4_7
P7_0
P7_7
13.2 Crystal oscillator
The crystal oscillator is controlled by the XTAL_OSC_CTRL register in the CGU (see
LPC18xx user manual).
The crystal oscillator operates at frequencies of 1 MHz to 25 MHz. This frequency can be
boosted to a higher frequency, up to the maximum CPU operating frequency, by the PLL.
The oscillator can operate in one of two modes: slave mode and oscillation mode.
Table 22.
Fundamental oscillation
frequency
2 MHz
4 MHz
8 MHz
LCD
function
-
LCDLP
LCDENAB/
LCDM
LCDFP
LCDDCLK
LCDLE
LCDPWR
LCDCLKIN PF_4
•
•
In slave mode the input clock signal should be coupled by means of a capacitor of
100 pF (C
this configuration can be left unconnected.
External components and models used in oscillation mode are shown in
and in
only a crystal and the capacitances C
case of fundamental mode oscillation (the fundamental frequency is represented by L,
C
and should not be larger than 7 pF. Parameters F
crystal manufacturer.
L
and R
Table 22
Recommended values for C
components parameters) low frequency mode
S
LPC18xx
pin used
-
P7_6
P4_6
P4_5
P4_7
P7_0
P7_7
C
). Capacitance C
All information provided in this document is subject to legal disclaimers.
in
Figure
and
Rev. 1.2 — 17 February 2011
Table
25), with an amplitude of at least 200 mVrms. The XTAL2 pin in
LCD
function
-
LCDLP
LCDENAB/
LCDM
LCDFP
LCDDCLK
LCDLE
LCDPWR
LCDCLKIN
23. Since the feedback resistance is integrated on chip,
P
in
< 200 
< 200 
< 200 
< 200 
< 200 
Maximum crystal series
resistance R
< 200 
< 200 
< 200 
Figure 26
X1/X2
TFT 16 bit (1:5:5:5 mode) TFT 24 bit
LPC18xx pin
used
-
P7_6
P4_6
P4_5
P4_7
P7_0
P7_7
PF_4
X1
in oscillation mode (crystal and external
and C
represents the parallel package capacitance
S
32-bit ARM Cortex-M3 microcontroller
X2
LPC1850/30/20/10
need to be connected externally in
LCD
function
-
LCDLP
LCDENAB/
LCDM
LCDFP
LCDDCLK
LCDLE
LCDPWR
LCDCLKIN PF_4
C
, C
L
, R
S
and C
External load capacitors
C
33 pF, 33 pF
39 pF, 39 pF
56 pF, 56 pF
18 pF, 18 pF
39 pF, 39 pF
56 pF, 56 pF
18 pF, 18 pF
39 pF, 39 pF
X1
LPC18xx
pin used
P4_1
P7_6
P4_6
P4_5
P4_7
P7_0
P7_7
, C
P
X2
are supplied by the
© NXP B.V. 2011. All rights reserved.
LCD
function
RED0
LCDLP
LCDENAB/
LCDM
LCDFP
LCDDCLK
LCDLE
LCDPWR
LCDCLKIN
Figure
78 of 87
26,