NXP LPC2144 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 Datasheet

LPC2141/42/44/46/48
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
Rev. 03 — 19 October 2007
Product data sheet
1. General description
The LPC2141/42/44/46/48 microcontrollers are based on a 16-bit/32-bit ARM7TDMI-S
CPU with real-time emulation and embedded trace support, that combine microcontrollers
with embedded high-speed flash memory ranging from 32 kB to 512 kB. A 128-bit wide
memory interface and a unique accelerator architecture enable 32-bit code execution at
the maximum clock rate. For critical code size applications, the alternative 16-bit Thumb
mode reduces code by more than 30 % with minimal performance penalty.
Due to their tiny size and low power consumption, LPC2141/42/44/46/48 are ideal for
applications where miniaturization is a key requirement, such as access control and
point-of-sale. Serial communications interfaces ranging from a USB 2.0 Full-speed device,
multiple UARTs, SPI, SSP to I2C-bus and on-chip SRAM of 8 kB up to 40 kB, make these
devices very well suited for communication gateways and protocol converters, soft
modems, voice recognition and low end imaging, providing both large buffer size and high
processing power. Various 32-bit timers, single or dual 10-bit ADCs, 10-bit DAC, PWM
channels and 45 fast GPIO lines with up to nine edge or level sensitive external interrupt
pins make these microcontrollers suitable for industrial control and medical systems.
2. Features
2.1 Key features
n 16-bit/32-bit ARM7TDMI-S microcontroller in a tiny LQFP64 package
n 8 kB to 40 kB of on-chip static RAM and 32 kB to 512 kB of on-chip flash memory;
128-bit wide interface/accelerator enables high-speed 60 MHz operation
n In-System Programming/In-Application Programming (ISP/IAP) via on-chip boot
loader software, single flash sector or full chip erase in 400 ms and programming of
256 B in 1 ms
n EmbeddedICE RT and Embedded Trace interfaces offer real-time debugging with the
on-chip RealMonitor software and high-speed tracing of instruction execution
n USB 2.0 Full-speed compliant device controller with 2 kB of endpoint RAM
In addition, the LPC2146/48 provides 8 kB of on-chip RAM accessible to USB by DMA
n One or two (LPC2141/42 vs, LPC2144/46/48) 10-bit ADCs provide a total of 6/14
analog inputs, with conversion times as low as 2.44 µs per channel
n Single 10-bit DAC provides variable analog output (LPC2142/44/46/48 only)
n Two 32-bit timers/external event counters (with four capture and four compare
channels each), PWM unit (six outputs) and watchdog
LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
n Low power Real-Time Clock (RTC) with independent power and 32 kHz clock input
n Multiple serial interfaces including two UARTs (16C550), two Fast I2C-bus (400 kbit/s),
SPI and SSP with buffering and variable data length capabilities
n Vectored Interrupt Controller (VIC) with configurable priorities and vector addresses
n Up to 45 of 5 V tolerant fast general purpose I/O pins in a tiny LQFP64 package
n Up to 21 external interrupt pins available
n 60 MHz maximum CPU clock available from programmable on-chip PLL with settling
time of 100 µs
n On-chip integrated oscillator operates with an external crystal from 1 MHz to 25 MHz
n Power saving modes include Idle and Power-down
n Individual enable/disable of peripheral functions as well as peripheral clock scaling for
additional power optimization
n Processor wake-up from Power-down mode via external interrupt or BOD
n Single power supply chip with POR and BOD circuits:
u CPU operating voltage range of 3.0 V to 3.6 V (3.3 V ± 10 %) with 5 V tolerant I/O
pads
3. Ordering information
Table 1.
Ordering information
Type number
LPC2141FBD64
Package
Name
Description
Version
LQFP64
plastic low profile quad flat package; 64 leads;
body 10 × 10 × 1.4 mm
SOT314-2
LPC2142FBD64
LPC2144FBD64
LPC2146FBD64
LPC2148FBD64
3.1 Ordering options
Table 2.
Ordering options
Type number
Flash
RAM
memory
Endpoint
USB RAM
ADC (channels
overall)
DAC
Temperature
range (°C)
LPC2141FBD64 32 kB
8 kB
2 kB
1 (6 channels)
-
−40 to +85
LPC2142FBD64 64 kB
16 kB
2 kB
1 (6 channels)
1
−40 to +85
LPC2144FBD64 128 kB
16 kB
2 kB
2 (14 channels)
1
−40 to +85
LPC2146FBD64 256 kB
32 kB + 8 kB 2 kB
shared with
USB DMA[1]
2 (14 channels)
1
−40 to +85
LPC2148FBD64 512 kB
32 kB + 8 kB 2 kB
shared with
USB DMA[1]
2 (14 channels)
1
−40 to +85
[1]
While the USB DMA is the primary user of the additional 8 kB RAM, this RAM is also accessible at any time
by the CPU as a general purpose RAM for data and code storage.
LPC2141_42_44_46_48_3
Product data sheet
© NXP B.V. 2007. All rights reserved.
Rev. 03 — 19 October 2007
2 of 39
LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
4. Block diagram
TMS(1)
TDI(1)
TRST(1)
TCK(1)
TDO(1)
P0[31:28] and
P0[25:0]
P1[31:16]
EMULATION TRACE
MODULE
LPC2141/42/44/46/48
TEST/DEBUG
INTERFACE
FAST GENERAL
PURPOSE I/O
XTAL2
RST
XTAL1
ARM7TDMI-S
AHB BRIDGE
ARM7 local bus
PLL0
SYSTEM
FUNCTIONS
system
clock
PLL1
USB
clock
VECTORED
INTERRUPT
CONTROLLER
AMBA AHB
(Advanced High-performance Bus)
INTERNAL
SRAM
CONTROLLER
INTERNAL
FLASH
CONTROLLER
8 kB/16 kB/
32 kB
SRAM
32 kB/64 kB/128 kB/
256 kB/512 kB
FLASH
AHB TO VPB
BRIDGE
VPB
DIVIDER
VPB (VLSI
peripheral bus)
AHB
DECODER
EXTERNAL
INTERRUPTS
USB 2.0 FULL-SPEED
DEVICE CONTROLLER
WITH DMA(3)
CAPTURE/COMPARE
(W/EXTERNAL CLOCK)
TIMER 0/TIMER 1
I2C-BUS SERIAL
INTERFACES 0 AND 1
EINT3 to EINT0
4 × CAP0
4 × CAP1
8 × MAT0
8 × MAT1
8 kB RAM
SHARED WITH
USB DMA(3)
AD0[7:6] and
AD0[4:1]
D+
D−
UP_LED
CONNECT
VBUS
SCL0, SCL1
SDA0, SDA1
SCK0, SCK1
ADC0 AND ADC1(2)
MOSI0, MOSI1
SPI AND SSP
SERIAL INTERFACES
AD1[7:0](2)
MISO0, MISO1
SSEL0, SSEL1
TXD0, TXD1
AOUT(4)
P0[31:28] and
P0[25:0]
P1[31:16]
PWM6 to PWM0
DAC
UART0/UART1
GENERAL
PURPOSE I/O
REAL-TIME CLOCK
PWM0
WATCHDOG
TIMER
RXD0, RXD1
DSR1(2),CTS1(2),
RTS1(2), DTR1(2)
DCD1(2),RI1(2)
RTCX1
RTCX2
VBAT
SYSTEM
CONTROL
002aab560
(1) Pins shared with GPIO.
(2) LPC2144/46/48 only.
(3) USB DMA controller with 8 kB of RAM accessible as general purpose RAM and/or DMA is available in LPC2146/48 only.
(4) LPC2142/44/46/48 only.
Fig 1. Block diagram
LPC2141_42_44_46_48_3
Product data sheet
© NXP B.V. 2007. All rights reserved.
Rev. 03 — 19 October 2007
3 of 39
LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
5. Pinning information
49 VBAT
50 VSS
51 VDD
52 P1.30/TMS
53 P0.18/CAP1.3/MISO1/MAT1.3
54 P0.19/MAT1.2/MOSI1/CAP1.2
55 P0.20/MAT1.3/SSEL1/EINT3
56 P1.29/TCK
57 RESET
58 P0.23/VBUS
59 VSSA
60 P1.28/TDI
61 XTAL2
62 XTAL1
63 VREF
64 P1.27/TDO
5.1 Pinning
P0.21/PWM5/CAP1.3
1
48 P1.20/TRACESYNC
P0.22/CAP0.0/MAT0.0
2
47 P0.17/CAP1.2/SCK1/MAT1.2
RTCX1
3
46 P0.16/EINT0/MAT0.2/CAP0.2
P1.19/TRACEPKT3
4
45 P0.15/EINT2
RTCX2
5
44 P1.21/PIPESTAT0
VSS
6
43 VDD
VDDA
7
42 VSS
P1.18/TRACEPKT2
8
P0.25/AD0.4
9
41 P0.14/EINT1/SDA1
LPC2141
40 P1.22/PIPESTAT1
D+ 10
39 P0.13/MAT1.1
D− 11
38 P0.12/MAT1.0
P1.17/TRACEPKT1 12
37 P0.11/CAP1.1/SCL1
P0.28/AD0.1/CAP0.2/MAT0.2 13
36 P1.23/PIPESTAT2
P0.29/AD0.2/CAP0.3/MAT0.3 14
35 P0.10/CAP1.0
P0.30/AD0.3/EINT3/CAP0.0 15
34 P0.9/RXD1/PWM6/EINT3
P1.16/TRACEPKT0 16
P1.24/TRACECLK 32
P0.7/SSEL0/PWM2/EINT2 31
P0.6/MOSI0/CAP0.2 30
P0.5/MISO0/MAT0.1/AD0.7 29
P1.25/EXTIN0 28
P0.4/SCK0/CAP0.1/AD0.6 27
P0.3/SDA0/MAT0.0/EINT1 26
VSS 25
P1.26/RTCK 24
VDD 23
P0.2/SCL0/CAP0.0 22
P0.1/RXD0/PWM3/EINT0 21
P1.31/TRST 20
P0.0/TXD0/PWM1 19
VSS 18
P0.31/UP_LED/CONNECT 17
33 P0.8/TXD1/PWM4
002aab733
Fig 2. LPC2141 pinning
LPC2141_42_44_46_48_3
Product data sheet
© NXP B.V. 2007. All rights reserved.
Rev. 03 — 19 October 2007
4 of 39
LPC2141/42/44/46/48
NXP Semiconductors
49 VBAT
50 VSS
51 VDD
52 P1.30/TMS
53 P0.18/CAP1.3/MISO1/MAT1.3
54 P0.19/MAT1.2/MOSI1/CAP1.2
55 P0.20/MAT1.3/SSEL1/EINT3
56 P1.29/TCK
57 RESET
58 P0.23/VBUS
59 VSSA
60 P1.28/TDI
61 XTAL2
62 XTAL1
63 VREF
64 P1.27/TDO
Single-chip 16-bit/32-bit microcontrollers
P0.21/PWM5/CAP1.3
1
48 P1.20/TRACESYNC
P0.22/CAP0.0/MAT0.0
2
47 P0.17/CAP1.2/SCK1/MAT1.2
RTCX1
3
46 P0.16/EINT0/MAT0.2/CAP0.2
P1.19/TRACEPKT3
4
45 P0.15/EINT2
RTCX2
5
44 P1.21/PIPESTAT0
VSS
6
43 VDD
VDDA
7
42 VSS
P1.18/TRACEPKT2
8
P0.25/AD0.4/AOUT
9
41 P0.14/EINT1/SDA1
LPC2142
40 P1.22/PIPESTAT1
D+ 10
39 P0.13/MAT1.1
D− 11
38 P0.12/MAT1.0
P1.17/TRACEPKT1 12
37 P0.11/CAP1.1/SCL1
P0.28/AD0.1/CAP0.2/MAT0.2 13
36 P1.23/PIPESTAT2
P0.29/AD0.2/CAP0.3/MAT0.3 14
35 P0.10/CAP1.0
P0.30/AD0.3/EINT3/CAP0.0 15
34 P0.9/RXD1/PWM6/EINT3
P1.16/TRACEPKT0 16
P1.24/TRACECLK 32
P0.7/SSEL0/PWM2/EINT2 31
P0.6/MOSI0/CAP0.2 30
P0.5/MISO0/MAT0.1/AD0.7 29
P1.25/EXTIN0 28
P0.4/SCK0/CAP0.1/AD0.6 27
P0.3/SDA0/MAT0.0/EINT1 26
VSS 25
P1.26/RTCK 24
VDD 23
P0.2/SCL0/CAP0.0 22
P0.1/RXD0/PWM3/EINT0 21
P1.31/TRST 20
P0.0/TXD0/PWM1 19
VSS 18
P0.31/UP_LED/CONNECT 17
33 P0.8/TXD1/PWM4
002aab734
Fig 3. LPC2142 pinning
LPC2141_42_44_46_48_3
Product data sheet
© NXP B.V. 2007. All rights reserved.
Rev. 03 — 19 October 2007
5 of 39
LPC2141/42/44/46/48
NXP Semiconductors
49 VBAT
50 VSS
51 VDD
52 P1.30/TMS
53 P0.18/CAP1.3/MISO1/MAT1.3
54 P0.19/MAT1.2/MOSI1/CAP1.2
55 P0.20/MAT1.3/SSEL1/EINT3
56 P1.29/TCK
57 RESET
58 P0.23/VBUS
59 VSSA
60 P1.28/TDI
61 XTAL2
62 XTAL1
63 VREF
64 P1.27/TDO
Single-chip 16-bit/32-bit microcontrollers
P0.21/PWM5/AD1.6/CAP1.3
1
48 P1.20/TRACESYNC
P0.22/AD1.7/CAP0.0/MAT0.0
2
47 P0.17/CAP1.2/SCK1/MAT1.2
RTCX1
3
46 P0.16/EINT0/MAT0.2/CAP0.2
P1.19/TRACEPKT3
4
45 P0.15/RI1/EINT2/AD1.5
RTCX2
5
44 P1.21/PIPESTAT0
VSS
6
43 VDD
VDDA
7
42 VSS
P1.18/TRACEPKT2
8
P0.25/AD0.4/AOUT
9
41 P0.14/DCD1/EINT1/SDA1
LPC2144/2146/2148
40 P1.22/PIPESTAT1
D+ 10
39 P0.13/DTR1/MAT1.1/AD1.4
D− 11
38 P0.12/DSR1/MAT1.0/AD1.3
P1.17/TRACEPKT1 12
37 P0.11/CTS1/CAP1.1/SCL1
P0.28/AD0.1/CAP0.2/MAT0.2 13
36 P1.23/PIPESTAT2
P0.29/AD0.2/CAP0.3/MAT0.3 14
35 P0.10/RTS1/CAP1.0/AD1.2
P1.24/TRACECLK 32
P0.7/SSEL0/PWM2/EINT2 31
P0.6/MOSI0/CAP0.2/AD1.0 30
P0.5/MISO0/MAT0.1/AD0.7 29
P1.25/EXTIN0 28
P0.4/SCK0/CAP0.1/AD0.6 27
P0.3/SDA0/MAT0.0/EINT1 26
VSS 25
P1.26/RTCK 24
VDD 23
P0.2/SCL0/CAP0.0 22
P0.1/RXD0/PWM3/EINT0 21
P1.31/TRST 20
P0.0/TXD0/PWM1 19
33 P0.8/TXD1/PWM4/AD1.1
VSS 18
34 P0.9/RXD1/PWM6/EINT3
P1.16/TRACEPKT0 16
P0.31/UP_LED/CONNECT 17
P0.30/AD0.3/EINT3/CAP0.0 15
002aab735
Fig 4. LPC2144/2146/2148 pinning
LPC2141_42_44_46_48_3
Product data sheet
© NXP B.V. 2007. All rights reserved.
Rev. 03 — 19 October 2007
6 of 39
LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
5.2 Pin description
Table 3.
Pin description
Symbol
Pin
P0.0 to P0.31
Type
Description
I/O
Port 0: Port 0 is a 32-bit I/O port with individual direction controls for each bit.
Total of 31 pins of the Port 0 can be used as a general purpose bidirectional
digital I/Os while P0.31 is output only pin. The operation of port 0 pins
depends upon the pin function selected via the pin connect block.
Pins P0.24, P0.26 and P0.27 are not available
P0.0/TXD0/
PWM1
19[1]
P0.1/RXD0/
PWM3/EINT0
21[2]
P0.2/SCL0/
CAP0.0
22[3]
P0.3/SDA0/
MAT0.0/EINT1
26[3]
P0.4/SCK0/
CAP0.1/AD0.6
P0.5/MISO0/
MAT0.1/AD0.7
P0.6/MOSI0/
CAP0.2/AD1.0
P0.7/SSEL0/
PWM2/EINT2
P0.8/TXD1/
PWM4/AD1.1
27[4]
29[4]
30[4]
31[2]
33[4]
I/O
P0.0 — General purpose input/output digital pin (GPIO)
O
TXD0 — Transmitter output for UART0
O
PWM1 — Pulse Width Modulator output 1
I/O
P0.1 — General purpose input/output digital pin (GPIO)
I
RXD0 — Receiver input for UART0
O
PWM3 — Pulse Width Modulator output 3
I
EINT0 — External interrupt 0 input
I/O
P0.2 — General purpose input/output digital pin (GPIO)
I/O
SCL0 — I2C0 clock input/output, open-drain output (for I2C-bus compliance)
I
CAP0.0 — Capture input for Timer 0, channel 0
I/O
P0.3 — General purpose input/output digital pin (GPIO)
I/O
SDA0 — I2C0 data input/output, open-drain output (for I2C-bus compliance)
O
MAT0.0 — Match output for Timer 0, channel 0
I
EINT1 — External interrupt 1 input
I/O
P0.4 — General purpose input/output digital pin (GPIO)
I/O
SCK0 — Serial clock for SPI0, SPI clock output from master or input to slave
I
CAP0.1 — Capture input for Timer 0, channel 0
I
AD0.6 — ADC 0, input 6
I/O
P0.5 — General purpose input/output digital pin (GPIO)
I/O
MISO0 — Master In Slave OUT for SPI0, data input to SPI master or data
output from SPI slave
O
MAT0.1 — Match output for Timer 0, channel 1
I
AD0.7 — ADC 0, input 7
I/O
P0.6 — General purpose input/output digital pin (GPIO)
I/O
MOSI0 — Master Out Slave In for SPI0, data output from SPI master or data
input to SPI slave
I
CAP0.2 — Capture input for Timer 0, channel 2
I
AD1.0 — ADC 1, input 0, available in LPC2144/46/48 only
I/O
P0.7 — General purpose input/output digital pin (GPIO)
I
SSEL0 — Slave Select for SPI0, selects the SPI interface as a slave
O
PWM2 — Pulse Width Modulator output 2
I
EINT2 — External interrupt 2 input
I/O
P0.8 — General purpose input/output digital pin (GPIO)
O
TXD1 — Transmitter output for UART1
O
PWM4 — Pulse Width Modulator output 4
I
AD1.1 — ADC 1, input 1, available in LPC2144/46/48 only
LPC2141_42_44_46_48_3
Product data sheet
© NXP B.V. 2007. All rights reserved.
Rev. 03 — 19 October 2007
7 of 39
LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
Table 3.
Pin description …continued
Symbol
Pin
Type
Description
P0.9/RXD1/
PWM6/EINT3
34[2]
I/O
P0.9 — General purpose input/output digital pin (GPIO)
I
RXD1 — Receiver input for UART1
O
PWM6 — Pulse Width Modulator output 6
I
EINT3 — External interrupt 3 input
I/O
P0.10 — General purpose input/output digital pin (GPIO)
O
RTS1 — Request to Send output for UART1, LPC2144/46/48 only
I
CAP1.0 — Capture input for Timer 1, channel 0
I
AD1.2 — ADC 1, input 2, available in LPC2144/46/48 only
I/O
P0.11 — General purpose input/output digital pin (GPIO)
I
CTS1 — Clear to Send input for UART1, available in LPC2144/46/48 only
I
CAP1.1 — Capture input for Timer 1, channel 1
I/O
SCL1 — I2C1 clock input/output, open-drain output (for I2C-bus compliance)
I/O
P0.12 — General purpose input/output digital pin (GPIO)
I
DSR1 — Data Set Ready input for UART1, available in LPC2144/46/48 only
O
MAT1.0 — Match output for Timer 1, channel 0
I
AD1.3 — ADC input 3, available in LPC2144/46/48 only
I/O
P0.13 — General purpose input/output digital pin (GPIO)
O
DTR1 — Data Terminal Ready output for UART1, LPC2144/46/48 only
O
MAT1.1 — Match output for Timer 1, channel 1
I
AD1.4 — ADC input 4, available in LPC2144/46/48 only
I/O
P0.14 — General purpose input/output digital pin (GPIO)
I
DCD1 — Data Carrier Detect input for UART1, LPC2144/46/48 only
I
EINT1 — External interrupt 1 input
I/O
SDA1 — I2C1 data input/output, open-drain output (for I2C-bus compliance)
P0.10/RTS1/
CAP1.0/AD1.2
P0.11/CTS1/
CAP1.1/SCL1
P0.12/DSR1/
MAT1.0/AD1.3
P0.13/DTR1/
MAT1.1/AD1.4
P0.14/DCD1/
EINT1/SDA1
35[4]
37[3]
38[4]
39[4]
41[3]
Note: LOW on this pin while RESET is LOW forces on-chip boot loader to
take over control of the part after reset
P0.15/RI1/
EINT2/AD1.5
P0.16/EINT0/
MAT0.2/CAP0.2
P0.17/CAP1.2/
SCK1/MAT1.2
45[4]
46[2]
47[1]
I/O
P0.15 — General purpose input/output digital pin (GPIO)
I
RI1 — Ring Indicator input for UART1, available in LPC2144/46/48 only
I
EINT2 — External interrupt 2 input
I
AD1.5 — ADC 1, input 5, available in LPC2144/46/48 only
I/O
P0.16 — General purpose input/output digital pin (GPIO)
I
EINT0 — External interrupt 0 input
O
MAT0.2 — Match output for Timer 0, channel 2
I
CAP0.2 — Capture input for Timer 0, channel 2
I/O
P0.17 — General purpose input/output digital pin (GPIO)
I
CAP1.2 — Capture input for Timer 1, channel 2
I/O
SCK1 — Serial Clock for SSP, clock output from master or input to slave
O
MAT1.2 — Match output for Timer 1, channel 2
LPC2141_42_44_46_48_3
Product data sheet
© NXP B.V. 2007. All rights reserved.
Rev. 03 — 19 October 2007
8 of 39
LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
Table 3.
Pin description …continued
Symbol
Pin
Type
Description
P0.18/CAP1.3/
MISO1/MAT1.3
53[1]
I/O
P0.18 — General purpose input/output digital pin (GPIO)
I
CAP1.3 — Capture input for Timer 1, channel 3
I/O
MISO1 — Master In Slave Out for SSP, data input to SPI master or data
output from SSP slave
O
MAT1.3 — Match output for Timer 1, channel 3
I/O
P0.19 — General purpose input/output digital pin (GPIO)
O
MAT1.2 — Match output for Timer 1, channel 2
I/O
MOSI1 — Master Out Slave In for SSP, data output from SSP master or data
input to SSP slave
I
CAP1.2 — Capture input for Timer 1, channel 2
I/O
P0.20 — General purpose input/output digital pin (GPIO)
P0.19/MAT1.2/
MOSI1/CAP1.2
P0.20/MAT1.3/
SSEL1/EINT3
P0.21/PWM5/
AD1.6/CAP1.3
P0.22/AD1.7/
CAP0.0/MAT0.0
P0.23/VBUS
54[1]
55[2]
1[4]
2[4]
58[1]
O
MAT1.3 — Match output for Timer 1, channel 3
I
SSEL1 — Slave Select for SSP, selects the SSP interface as a slave
I
EINT3 — External interrupt 3 input
I/O
P0.21 — General purpose input/output digital pin (GPIO)
O
PWM5 — Pulse Width Modulator output 5
I
AD1.6 — ADC 1, input 6, available in LPC2144/46/48 only
I
CAP1.3 — Capture input for Timer 1, channel 3
I/O
P0.22 — General purpose input/output digital pin (GPIO)
I
AD1.7 — ADC 1, input 7, available in LPC2144/46/48 only
I
CAP0.0 — Capture input for Timer 0, channel 0
O
MAT0.0 — Match output for Timer 0, channel 0
I/O
P0.23 — General purpose input/output digital pin (GPIO)
I
VBUS — Indicates the presence of USB bus power
Note: This signal must be HIGH for USB reset to occur
P0.25/AD0.4/
AOUT
P0.28/AD0.1/
CAP0.2/MAT0.2
P0.29/AD0.2/
CAP0.3/MAT0.3
P0.30/AD0.3/
EINT3/CAP0.0
9[5]
13[4]
14[4]
15[4]
I/O
P0.25 — General purpose input/output digital pin (GPIO)
I
AD0.4 — ADC 0, input 4
O
AOUT — DAC output, available in LPC2142/44/46/48 only
I/O
P0.28 — General purpose input/output digital pin (GPIO)
I
AD0.1 — ADC 0, input 1
I
CAP0.2 — Capture input for Timer 0, channel 2
O
MAT0.2 — Match output for Timer 0, channel 2
I/O
P0.29 — General purpose input/output digital pin (GPIO)
I
AD0.2 — ADC 0, input 2
I
CAP0.3 — Capture input for Timer 0, Channel 3
O
MAT0.3 — Match output for Timer 0, channel 3
I/O
P0.30 — General purpose input/output digital pin (GPIO)
I
AD0.3 — ADC 0, input 3
I
EINT3 — External interrupt 3 input
I
CAP0.0 — Capture input for Timer 0, channel 0
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LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
Table 3.
Pin description …continued
Symbol
Pin
P0.31/UP_LED/ 17[6]
CONNECT
Type
Description
O
P0.31 — General purpose output only digital pin (GPO)
O
UP_LED — USB GoodLink LED indicator, it is LOW when device is
configured (non-control endpoints enabled), it is HIGH when the device is not
configured or during global suspend
O
CONNECT — Signal used to switch an external 1.5 kΩ resistor under the
software control, used with the SoftConnect USB feature
Important: This is an digital output only pin, this pin MUST NOT be externally
pulled LOW when RESET pin is LOW or the JTAG port will be disabled
P1.0 to P1.31
P1.16/
TRACEPKT0
16[6]
P1.17/
TRACEPKT1
12[6]
P1.18/
TRACEPKT2
8[6]
P1.19/
TRACEPKT3
4[6]
P1.20/
TRACESYNC
48[6]
I/O
Port 1: Port 1 is a 32-bit bidirectional I/O port with individual direction controls
for each bit, the operation of port 1 pins depends upon the pin function
selected via the pin connect block, pins 0 through 15 of port 1 are not
available
I/O
P1.16 — General purpose input/output digital pin (GPIO)
O
TRACEPKT0 — Trace Packet, bit 0, standard I/O port with internal pull-up
I/O
P1.17 — General purpose input/output digital pin (GPIO)
O
TRACEPKT1 — Trace Packet, bit 1, standard I/O port with internal pull-up
I/O
P1.18 — General purpose input/output digital pin (GPIO)
O
TRACEPKT2 — Trace Packet, bit 2, standard I/O port with internal pull-up
I/O
P1.19 — General purpose input/output digital pin (GPIO)
O
TRACEPKT3 — Trace Packet, bit 3, standard I/O port with internal pull-up
I/O
P1.20 — General purpose input/output digital pin (GPIO)
O
TRACESYNC — Trace Synchronization, standard I/O port with internal
pull-up
Note: LOW on this pin while RESET is LOW enables pins P1.25:16 to
operate as Trace port after reset
P1.21/
PIPESTAT0
44[6]
P1.22/
PIPESTAT1
40[6]
P1.23/
PIPESTAT2
36[6]
P1.24/
TRACECLK
32[6]
P1.25/EXTIN0
28[6]
P1.26/RTCK
24[6]
I/O
P1.21 — General purpose input/output digital pin (GPIO)
O
PIPESTAT0 — Pipeline Status, bit 0, standard I/O port with internal pull-up
I/O
P1.22 — General purpose input/output digital pin (GPIO)
O
PIPESTAT1 — Pipeline Status, bit 1, standard I/O port with internal pull-up
I/O
P1.23 — General purpose input/output digital pin (GPIO)
O
PIPESTAT2 — Pipeline Status, bit 2, standard I/O port with internal pull-up
I/O
P1.24 — General purpose input/output digital pin (GPIO)
O
TRACECLK — Trace Clock, standard I/O port with internal pull-up
I/O
P1.25 — General purpose input/output digital pin (GPIO)
I
EXTIN0 — External Trigger Input, standard I/O with internal pull-up
I/O
P1.26 — General purpose input/output digital pin (GPIO)
I/O
RTCK — Returned Test Clock output, extra signal added to the JTAG port,
assists debugger synchronization when processor frequency varies,
bidirectional pin with internal pull-up
Note: LOW on RTCK while RESET is LOW enables pins P1.31:26 to operate
as Debug port after reset
P1.27/TDO
64[6]
I/O
P1.27 — General purpose input/output digital pin (GPIO)
O
TDO — Test Data out for JTAG interface
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Single-chip 16-bit/32-bit microcontrollers
Table 3.
Pin description …continued
Symbol
Pin
Type
Description
P1.28/TDI
60[6]
I/O
P1.28 — General purpose input/output digital pin (GPIO)
I
TDI — Test Data in for JTAG interface
P1.29/TCK
56[6]
I/O
P1.29 — General purpose input/output digital pin (GPIO)
I
TCK — Test Clock for JTAG interface
P1.30/TMS
52[6]
I/O
P1.30 — General purpose input/output digital pin (GPIO)
I
TMS — Test Mode Select for JTAG interface
P1.31/TRST
20[6]
I/O
P1.31 — General purpose input/output digital pin (GPIO)
I
TRST — Test Reset for JTAG interface
D+
10[7]
I/O
USB bidirectional D+ line
D−
11[7]
I/O
USB bidirectional D− line
RESET
57[8]
I
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
XTAL1
62[9]
I
Input to the oscillator circuit and internal clock generator circuits
XTAL2
61[9]
O
Output from the oscillator amplifier
RTCX1
3[9]
I
Input to the RTC oscillator circuit
RTCX2
5[9]
O
Output from the RTC oscillator circuit
VSS
6, 18, 25, 42, I
50
Ground: 0 V reference
VSSA
59
I
Analog ground: 0 V reference, this should nominally be the same voltage as
VSS, but should be isolated to minimize noise and error
VDD
23, 43, 51
I
3.3 V power supply: This is the power supply voltage for the core and I/O
ports
VDDA
7
I
Analog 3.3 V power supply: This should be nominally the same voltage as
VDD but should be isolated to minimize noise and error, this voltage is only
used to power the on-chip ADC(s) and DAC
VREF
63
I
ADC reference voltage: This should be nominally less than or equal to the
VDD voltage but should be isolated to minimize noise and error, level on this
pin is used as a reference for ADC(s) and DAC
VBAT
49
I
RTC power supply voltage: 3.3 V on this pin supplies the power to the RTC
[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 I2C-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 kΩ to 300 kΩ.
[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.
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Single-chip 16-bit/32-bit microcontrollers
6. Functional description
6.1 Architectural overview
The ARM7TDMI-S is a general purpose 32-bit microprocessor, which offers high
performance and very low power consumption. The ARM architecture is based on
Reduced Instruction Set Computer (RISC) principles, and the instruction set and related
decode mechanism are much simpler than those of microprogrammed Complex
Instruction Set Computers (CISC). This simplicity results in a high instruction throughput
and impressive real-time interrupt response from a small and cost-effective processor
core.
Pipeline techniques are employed so that all parts of the processing and memory systems
can operate continuously. Typically, while one instruction is being executed, its successor
is being decoded, and a third instruction is being fetched from memory.
The ARM7TDMI-S processor also employs a unique architectural strategy known as
Thumb, which makes it ideally suited to high-volume applications with memory
restrictions, or applications where code density is an issue.
The key idea behind Thumb is that of a super-reduced instruction set. Essentially, the
ARM7TDMI-S processor has two instruction sets:
• The standard 32-bit ARM set
• A 16-bit Thumb set
The Thumb set’s 16-bit instruction length allows it to approach twice the density of
standard ARM code while retaining most of the ARM’s performance advantage over a
traditional 16-bit processor using 16-bit registers. This is possible because Thumb code
operates on the same 32-bit register set as ARM code.
Thumb code is able to provide up to 65 % of the code size of ARM, and 160 % of the
performance of an equivalent ARM processor connected to a 16-bit memory system.
The particular flash implementation in the LPC2141/42/44/46/48 allows for full speed
execution also in ARM mode. It is recommended to program performance critical and
short code sections (such as interrupt service routines and DSP algorithms) in ARM
mode. The impact on the overall code size will be minimal but the speed can be increased
by 30 % over Thumb mode.
6.2 On-chip flash program memory
The LPC2141/42/44/46/48 incorporate a 32 kB, 64 kB, 128 kB, 256 kB and 512 kB flash
memory system respectively. This memory may be used for both code and data storage.
Programming of the flash memory may be accomplished in several ways. It may be
programmed In System via the serial port. The application program may also erase and/or
program the flash while the application is running, allowing a great degree of flexibility for
data storage field firmware upgrades, etc. Due to the architectural solution chosen for an
on-chip boot loader, flash memory available for user’s code on LPC2141/42/44/46/48 is
32 kB, 64 kB, 128 kB, 256 kB and 500 kB respectively.
The LPC2141/42/44/46/48 flash memory provides a minimum of 100000 erase/write
cycles and 20 years of data-retention.
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6.3 On-chip static RAM
On-chip static RAM may be used for code and/or data storage. The SRAM may be
accessed as 8-bit, 16-bit, and 32-bit. The LPC2141, LPC2142/44 and LPC2146/48
provide 8 kB, 16 kB and 32 kB of static RAM respectively.
In case of LPC2146/48 only, an 8 kB SRAM block intended to be utilized mainly by the
USB can also be used as a general purpose RAM for data storage and code storage and
execution.
6.4 Memory map
The LPC2141/42/44/46/48 memory map incorporates several distinct regions, as shown
in Figure 5.
In addition, the CPU interrupt vectors may be remapped to allow them to reside in either
flash memory (the default) or on-chip static RAM. This is described in Section 6.19
“System control”.
4.0 GB
0xFFFF FFFF
AHB PERIPHERALS
0xF000 0000
3.75 GB
VPB PERIPHERALS
0xE000 0000
3.5 GB
3.0 GB
2.0 GB
RESERVED ADDRESS SPACE
0xC000 0000
0x8000 0000
0x7FFF FFFF
BOOT BLOCK (12 kB REMAPPED FROM
ON-CHIP FLASH MEMORY
0x7FFF D000
0x7FFF CFFF
RESERVED ADDRESS SPACE
0x7FD0 2000
0x7FD0 1FFF
8 kB ON-CHIP USB DMA RAM (LPC2146/2148)
0x7FD0 0000
0x7FCF FFFF
RESERVED ADDRESS SPACE
0x4000 8000
0x4000 7FFF
32 kB ON-CHIP STATIC RAM (LPC2146/2148)
0x4000 4000
0x4000 3FFF
16 kB ON-CHIP STATIC RAM (LPC2142/2144)
0x4000 2000
0x4000 1FFF
8 kB ON-CHIP STATIC RAM (LPC2141)
0x4000 0000
0x3FFF FFFF
1.0 GB
RESERVED ADDRESS SPACE
0x0008 0000
0x0007 FFFF
TOTAL OF 512 kB ON-CHIP NON-VOLATILE MEMORY
(LPC2148)
TOTAL OF 256 kB ON-CHIP NON-VOLATILE MEMORY
(LPC2146)
TOTAL OF 128 kB ON-CHIP NON-VOLATILE MEMORY
(LPC2144)
TOTAL OF 64 kB ON-CHIP NON-VOLATILE MEMORY
(LPC2142)
TOTAL OF 32 kB ON-CHIP NON-VOLATILE MEMORY
(LPC2141)
0.0 GB
0x0004 0000
0x0003 FFFF
0x0002 0000
0x0001 FFFF
0x0001 0000
0x0000 FFFF
0x0000 8000
0x0000 7FFF
0x0000 0000
002aab558
Fig 5. LPC2141/42/44/46/48 memory map
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6.5 Interrupt controller
The Vectored Interrupt Controller (VIC) accepts all of the interrupt request inputs and
categorizes them as Fast Interrupt Request (FIQ), vectored Interrupt Request (IRQ), and
non-vectored IRQ as defined by programmable settings. The programmable assignment
scheme means that priorities of interrupts from the various peripherals can be dynamically
assigned and adjusted.
Fast interrupt request (FIQ) has the highest priority. If more than one request is assigned
to FIQ, the VIC combines the requests to produce the FIQ signal to the ARM processor.
The fastest possible FIQ latency is achieved when only one request is classified as FIQ,
because then the FIQ service routine does not need to branch into the interrupt service
routine but can run from the interrupt vector location. If more than one request is assigned
to the FIQ class, the FIQ service routine will read a word from the VIC that identifies which
FIQ source(s) is (are) requesting an interrupt.
Vectored IRQs have the middle priority. Sixteen of the interrupt requests can be assigned
to this category. Any of the interrupt requests can be assigned to any of the 16 vectored
IRQ slots, among which slot 0 has the highest priority and slot 15 has the lowest.
Non-vectored IRQs have the lowest priority.
The VIC combines the requests from all the vectored and non-vectored IRQs to produce
the IRQ signal to the ARM processor. The IRQ service routine can start by reading a
register from the VIC and jumping there. If any of the vectored IRQs are pending, the VIC
provides the address of the highest-priority requesting IRQs service routine, otherwise it
provides the address of a default routine that is shared by all the non-vectored IRQs. The
default routine can read another VIC register to see what IRQs are active.
6.5.1 Interrupt sources
Each peripheral device has one interrupt line connected to the Vectored Interrupt
Controller, but may have several internal interrupt flags. Individual interrupt flags may also
represent more than one interrupt source.
6.6 Pin connect block
The pin connect block allows selected pins of the microcontroller to have more than one
function. Configuration registers control the multiplexers to allow connection between the
pin and the on chip peripherals. Peripherals should be connected to the appropriate pins
prior to being activated, and prior to any related interrupt(s) being enabled. Activity of any
enabled peripheral function that is not mapped to a related pin should be considered
undefined.
The Pin Control Module with its pin select registers defines the functionality of the
microcontroller in a given hardware environment.
After reset all pins of Port 0 and Port 1 are configured as input with the following
exceptions: If debug is enabled, the JTAG pins will assume their JTAG functionality; if
trace is enabled, the Trace pins will assume their trace functionality. The pins associated
with the I2C0 and I2C1 interface are open drain.
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6.7 Fast general purpose parallel I/O (GPIO)
Device pins that are not connected to a specific peripheral function are controlled by the
GPIO registers. Pins may be dynamically configured as inputs or outputs. Separate
registers allow the setting or clearing of any number of outputs simultaneously. The value
of the output register may be read back, as well as the current state of the port pins.
LPC2141/42/44/46/48 introduce accelerated GPIO functions over prior LPC2000 devices:
•
•
•
•
GPIO registers are relocated to the ARM local bus for the fastest possible I/O timing
Mask registers allow treating sets of port bits as a group, leaving other bits unchanged
All GPIO registers are byte addressable
Entire port value can be written in one instruction
6.7.1 Features
• Bit-level set and clear registers allow a single instruction to set or clear any number of
bits in one port
• Direction control of individual bits
• Separate control of output set and clear
• All I/O default to inputs after reset
6.8 10-bit ADC
The LPC2141/42 contain one and the LPC2144/46/48 contain two analog to digital
converters. These converters are single 10-bit successive approximation analog to digital
converters. While ADC0 has six channels, ADC1 has eight channels. Therefore, total
number of available ADC inputs for LPC2141/42 is 6 and for LPC2144/46/48 is 14.
6.8.1 Features
•
•
•
•
•
•
•
10 bit successive approximation analog to digital converter
Measurement range of 0 V to VREF (2.0 V ≤ VREF ≤ VDDA)
Each converter capable of performing more than 400000 10-bit samples per second
Every analog input has a dedicated result register to reduce interrupt overhead
Burst conversion mode for single or multiple inputs
Optional conversion on transition on input pin or timer match signal
Global Start command for both converters (LPC2142/44/46/48 only)
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6.9 10-bit DAC
The DAC enables the LPC2141/42/44/46/48 to generate a variable analog output. The
maximum DAC output voltage is the VREF voltage.
6.9.1 Features
•
•
•
•
10-bit DAC
Buffered output
Power-down mode available
Selectable speed versus power
6.10 USB 2.0 device controller
The USB is a 4-wire serial bus that supports communication between a host and a
number (127 max) of peripherals. The host controller allocates the USB bandwidth to
attached devices through a token based protocol. The bus supports hot plugging,
unplugging, and dynamic configuration of the devices. All transactions are initiated by the
host controller.
The LPC2141/42/44/46/48 is equipped with a USB device controller that enables
12 Mbit/s data exchange with a USB host controller. It consists of a register interface,
serial interface engine, endpoint buffer memory and DMA controller. The serial interface
engine decodes the USB data stream and writes data to the appropriate end point buffer
memory. The status of a completed USB transfer or error condition is indicated via status
registers. An interrupt is also generated if enabled.
A DMA controller (available in LPC2146/48 only) can transfer data between an endpoint
buffer and the USB RAM.
6.10.1 Features
•
•
•
•
•
Fully compliant with USB 2.0 Full-speed specification
•
•
•
•
•
•
RAM message buffer size based on endpoint realization and maximum packet size
Supports 32 physical (16 logical) endpoints
Supports control, bulk, interrupt and isochronous endpoints
Scalable realization of endpoints at run time
Endpoint maximum packet size selection (up to USB maximum specification) by
software at run time
Supports SoftConnect and GoodLink LED indicator, these two functions share one pin
Supports bus-powered capability with low suspend current
Supports DMA transfer on all non-control endpoints (LPC2146/48 only)
One duplex DMA channel serves all endpoints (LPC2146/48 only)
Allows dynamic switching between CPU controlled and DMA modes (only in
LPC2146/48)
• Double buffer implementation for bulk and isochronous endpoints
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6.11 UARTs
The LPC2141/42/44/46/48 each contain two UARTs. In addition to standard transmit and
receive data lines, the LPC2144/46/48 UART1 also provides a full modem control
handshake interface.
Compared to previous LPC2000 microcontrollers, UARTs in LPC2141/42/44/46/48
introduce a fractional baud rate generator for both UARTs, enabling these microcontrollers
to achieve standard baud rates such as 115200 with any crystal frequency above 2 MHz.
In addition, auto-CTS/RTS flow-control functions are fully implemented in hardware
(UART1 in LPC2144/46/48 only).
6.11.1 Features
•
•
•
•
16 B Receive and Transmit FIFOs
Register locations conform to 16C550 industry standard
Receiver FIFO trigger points at 1 B, 4 B, 8 B, and 14 B
Built-in fractional baud rate generator covering wide range of baud rates without a
need for external crystals of particular values
• Transmission FIFO control enables implementation of software (XON/XOFF) flow
control on both UARTs
• LPC2144/46/48 UART1 equipped with standard modem interface signals, this module
also provides full support for hardware flow control (auto-CTS/RTS)
6.12 I2C-bus serial I/O controller
The LPC2141/42/44/46/48 each contain two I2C-bus controllers.
The I2C-bus is bidirectional, for inter-IC control using only two wires: a serial clock line
(SCL), and a serial data line (SDA). Each device is recognized by a unique address and
can operate as either a receiver-only device (e.g., an LCD driver or a transmitter with the
capability to both receive and send information (such as memory)). Transmitters and/or
receivers can operate in either master or slave mode, depending on whether the chip has
to initiate a data transfer or is only addressed. The I2C-bus is a multi-master bus, it can be
controlled by more than one bus master connected to it.
The I2C-bus implemented in LPC2141/42/44/46/48 supports bit rates up to 400 kbit/s
(Fast I2C-bus).
6.12.1 Features
•
•
•
•
•
•
Compliant with standard I2C-bus interface
Easy to configure as master, slave, or master/slave
Programmable clocks allow versatile rate control
Bidirectional data transfer between masters and slaves
Multi-master bus (no central master)
Arbitration between simultaneously transmitting masters without corruption of serial
data on the bus
• Serial clock synchronization allows devices with different bit rates to communicate via
one serial bus
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• Serial clock synchronization can be used as a handshake mechanism to suspend and
resume serial transfer
• The I2C-bus can be used for test and diagnostic purposes
6.13 SPI serial I/O controller
The LPC2141/42/44/46/48 each contain one SPI controller. The SPI is a full duplex serial
interface, designed to handle multiple masters and slaves connected to a given bus. Only
a single master and a single slave can communicate on the interface during a given data
transfer. During a data transfer the master always sends a byte of data to the slave, and
the slave always sends a byte of data to the master.
6.13.1 Features
•
•
•
•
Compliant with SPI specification
Synchronous, Serial, Full Duplex, Communication
Combined SPI master and slave
Maximum data bit rate of one eighth of the input clock rate
6.14 SSP serial I/O controller
The LPC2141/42/44/46/48 each contain one SSP. The SSP controller is capable of
operation on a SPI, 4-wire SSI, or Microwire bus. It can interact with multiple masters and
slaves on the bus. However, only a single master and a single slave can communicate on
the bus during a given data transfer. The SSP supports full duplex transfers, with data
frames of 4 bits to 16 bits of data flowing from the master to the slave and from the slave
to the master. Often only one of these data flows carries meaningful data.
6.14.1 Features
• Compatible with Motorola’s SPI, TI’s 4-wire SSI and National Semiconductor’s
Microwire buses
•
•
•
•
Synchronous serial communication
Master or slave operation
8-frame FIFOs for both transmit and receive
Four bits to 16 bits per frame
6.15 General purpose timers/external event counters
The Timer/Counter is designed to count cycles of the peripheral clock (PCLK) or an
externally supplied clock and optionally generate interrupts or perform other actions at
specified timer values, based on four match registers. It also includes four capture inputs
to trap the timer value when an input signal transitions, optionally generating an interrupt.
Multiple pins can be selected to perform a single capture or match function, providing an
application with ‘or’ and ‘and’, as well as ‘broadcast’ functions among them.
The LPC2141/42/44/46/48 can count external events on one of the capture inputs if the
minimum external pulse is equal or longer than a period of the PCLK. In this configuration,
unused capture lines can be selected as regular timer capture inputs, or used as external
interrupts.
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6.15.1 Features
• A 32-bit timer/counter with a programmable 32-bit prescaler
• External event counter or timer operation
• Four 32-bit capture channels per timer/counter that can take a snapshot of the timer
value when an input signal transitions, a capture event may also optionally generate
an interrupt
• Four 32-bit match registers that allow:
– Continuous operation with optional interrupt generation on match
– Stop timer on match with optional interrupt generation
– Reset timer on match with optional interrupt generation
• Four external outputs per timer/counter corresponding to match registers, with the
following capabilities:
– Set LOW on match
– Set HIGH on match
– Toggle on match
– Do nothing on match
6.16 Watchdog timer
The purpose of the watchdog is to reset the microcontroller within a reasonable amount of
time if it enters an erroneous state. When enabled, the watchdog will generate a system
reset if the user program fails to ‘feed’ (or reload) the watchdog within a predetermined
amount of time.
6.16.1 Features
• Internally resets chip if not periodically reloaded
• Debug mode
• Enabled by software but requires a hardware reset or a watchdog reset/interrupt to be
disabled
•
•
•
•
Incorrect/Incomplete feed sequence causes reset/interrupt if enabled
Flag to indicate watchdog reset
Programmable 32-bit timer with internal pre-scaler
Selectable time period from (Tcy(PCLK) × 256 × 4) to (Tcy(PCLK) × 232 × 4) in multiples of
Tcy(PCLK) × 4
6.17 Real-time clock
The RTC is designed to provide a set of counters to measure time when normal or idle
operating mode is selected. The RTC has been designed to use little power, making it
suitable for battery powered systems where the CPU is not running continuously (Idle
mode).
6.17.1 Features
• Measures the passage of time to maintain a calendar and clock
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• Ultra-low power design to support battery powered systems
• Provides Seconds, Minutes, Hours, Day of Month, Month, Year, Day of Week, and Day
of Year
• Can use either the RTC dedicated 32 kHz oscillator input or clock derived from the
external crystal/oscillator input at XTAL1, programmable reference clock divider
allows fine adjustment of the RTC
• Dedicated power supply pin can be connected to a battery or the main 3.3 V
6.18 Pulse width modulator
The PWM is based on the standard timer block and inherits all of its features, although
only the PWM function is pinned out on the LPC2141/42/44/46/48. The timer is designed
to count cycles of the peripheral clock (PCLK) and optionally generate interrupts or
perform other actions when specified timer values occur, based on seven match registers.
The PWM function is also based on match register events.
The ability to separately control rising and falling edge locations allows the PWM to be
used for more applications. For instance, multi-phase motor control typically requires three
non-overlapping PWM outputs with individual control of all three pulse widths and
positions.
Two match registers can be used to provide a single edge controlled PWM output. One
match register (MR0) controls the PWM cycle rate, by resetting the count upon match.
The other match register controls the PWM edge position. Additional single edge
controlled PWM outputs require only one match register each, since the repetition rate is
the same for all PWM outputs. Multiple single edge controlled PWM outputs will all have a
rising edge at the beginning of each PWM cycle, when an MR0 match occurs.
Three match registers can be used to provide a PWM output with both edges controlled.
Again, the MR0 match register controls the PWM cycle rate. The other match registers
control the two PWM edge positions. Additional double edge controlled PWM outputs
require only two match registers each, since the repetition rate is the same for all PWM
outputs.
With double edge controlled PWM outputs, specific match registers control the rising and
falling edge of the output. This allows both positive going PWM pulses (when the rising
edge occurs prior to the falling edge), and negative going PWM pulses (when the falling
edge occurs prior to the rising edge).
6.18.1 Features
• Seven match registers allow up to six single edge controlled or three double edge
controlled PWM outputs, or a mix of both types
• The match registers also allow:
– Continuous operation with optional interrupt generation on match
– Stop timer on match with optional interrupt generation
– Reset timer on match with optional interrupt generation
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• Supports single edge controlled and/or double edge controlled PWM outputs. Single
edge controlled PWM outputs all go HIGH at the beginning of each cycle unless the
output is a constant LOW. Double edge controlled PWM outputs can have either edge
occur at any position within a cycle. This allows for both positive going and negative
going pulses.
• Pulse period and width can be any number of timer counts. This allows complete
flexibility in the trade-off between resolution and repetition rate. All PWM outputs will
occur at the same repetition rate.
• Double edge controlled PWM outputs can be programmed to be either positive going
or negative going pulses.
• Match register updates are synchronized with pulse outputs to prevent generation of
erroneous pulses. Software must ‘release’ new match values before they can become
effective.
• May be used as a standard timer if the PWM mode is not enabled
• A 32-bit Timer/Counter with a programmable 32-bit Prescaler
6.19 System control
6.19.1 Crystal oscillator
On-chip integrated oscillator operates with external crystal in range of 1 MHz to 25 MHz.
The oscillator output frequency is called fosc and the ARM processor clock frequency is
referred to as CCLK for purposes of rate equations, etc. fosc and CCLK are the same value
unless the PLL is running and connected. Refer to Section 6.19.2 “PLL” for additional
information.
6.19.2 PLL
The PLL accepts an input clock frequency in the range of 10 MHz to 25 MHz. The input
frequency is multiplied up into the range of 10 MHz to 60 MHz with a Current Controlled
Oscillator (CCO). The multiplier can be an integer value from 1 to 32 (in practice, the
multiplier value cannot be higher than 6 on this family of microcontrollers due to the upper
frequency limit of the CPU). The CCO operates in the range of 156 MHz to 320 MHz, so
there is an additional divider in the loop to keep the CCO within its frequency range while
the PLL is providing the desired output frequency. The output divider may be set to divide
by 2, 4, 8, or 16 to produce the output clock. Since the minimum output divider value is 2,
it is insured that the PLL output has a 50 % duty cycle. The PLL is turned off and
bypassed following a chip reset and may be enabled by software. The program must
configure and activate the PLL, wait for the PLL to Lock, then connect to the PLL as a
clock source. The PLL settling time is 100 µs.
6.19.3 Reset and wake-up timer
Reset has two sources on the LPC2141/42/44/46/48: the RESET pin and watchdog reset.
The RESET pin is a Schmitt trigger input pin with an additional glitch filter. Assertion of
chip reset by any source starts the Wake-up Timer (see Wake-up Timer description
below), causing the internal chip reset to remain asserted until the external reset is
de-asserted, the oscillator is running, a fixed number of clocks have passed, and the
on-chip flash controller has completed its initialization.
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When the internal reset is removed, the processor begins executing at address 0, which is
the reset vector. At that point, all of the processor and peripheral registers have been
initialized to predetermined values.
The Wake-up Timer ensures that the oscillator and other analog functions required for
chip operation are fully functional before the processor is allowed to execute instructions.
This is important at power on, all types of reset, and whenever any of the aforementioned
functions are turned off for any reason. Since the oscillator and other functions are turned
off during Power-down mode, any wake-up of the processor from Power-down mode
makes use of the Wake-up Timer.
The Wake-up Timer monitors the crystal oscillator as the means of checking whether it is
safe to begin code execution. When power is applied to the chip, or some event caused
the chip to exit Power-down mode, some time is required for the oscillator to produce a
signal of sufficient amplitude to drive the clock logic. The amount of time depends on
many factors, including the rate of VDD ramp (in the case of power on), the type of crystal
and its electrical characteristics (if a quartz crystal is used), as well as any other external
circuitry (e.g. capacitors), and the characteristics of the oscillator itself under the existing
ambient conditions.
6.19.4 Brownout detector
The LPC2141/42/44/46/48 include 2-stage monitoring of the voltage on the VDD pins. If
this voltage falls below 2.9 V, the BOD asserts an interrupt signal to the VIC. This signal
can be enabled for interrupt; if not, software can monitor the signal by reading dedicated
register.
The second stage of low voltage detection asserts reset to inactivate the
LPC2141/42/44/46/48 when the voltage on the VDD pins falls below 2.6 V. This reset
prevents alteration of the flash as operation of the various elements of the chip would
otherwise become unreliable due to low voltage. The BOD circuit maintains this reset
down below 1 V, at which point the POR circuitry maintains the overall reset.
Both the 2.9 V and 2.6 V thresholds include some hysteresis. In normal operation, this
hysteresis allows the 2.9 V detection to reliably interrupt, or a regularly-executed event
loop to sense the condition.
6.19.5 Code security
This feature of the LPC2141/42/44/46/48 allow an application to control whether it can be
debugged or protected from observation.
If after reset on-chip boot loader detects a valid checksum in flash and reads 0x8765 4321
from address 0x1FC in flash, debugging will be disabled and thus the code in flash will be
protected from observation. Once debugging is disabled, it can be enabled only by
performing a full chip erase using the ISP.
6.19.6 External interrupt inputs
The LPC2141/42/44/46/48 include up to nine edge or level sensitive External Interrupt
Inputs as selectable pin functions. When the pins are combined, external events can be
processed as four independent interrupt signals. The External Interrupt Inputs can
optionally be used to wake-up the processor from Power-down mode.
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Additionally capture input pins can also be used as external interrupts without the option
to wake the device up from Power-down mode.
6.19.7 Memory mapping control
The Memory Mapping Control alters the mapping of the interrupt vectors that appear
beginning at address 0x0000 0000. Vectors may be mapped to the bottom of the on-chip
flash memory, or to the on-chip static RAM. This allows code running in different memory
spaces to have control of the interrupts.
6.19.8 Power control
The LPC2141/42/44/46/48 supports two reduced power modes: Idle mode and
Power-down mode.
In Idle mode, execution of instructions is suspended until either a reset or interrupt occurs.
Peripheral functions continue operation during Idle mode and may generate interrupts to
cause the processor to resume execution. Idle mode eliminates power used by the
processor itself, memory systems and related controllers, and internal buses.
In Power-down mode, the oscillator is shut down and the chip receives no internal clocks.
The processor state and registers, peripheral registers, and internal SRAM values are
preserved throughout Power-down mode and the logic levels of chip output pins remain
static. The Power-down mode can be terminated and normal operation resumed by either
a reset or certain specific interrupts that are able to function without clocks. Since all
dynamic operation of the chip is suspended, Power-down mode reduces chip power
consumption to nearly zero.
Selecting an external 32 kHz clock instead of the PCLK as a clock-source for the on-chip
RTC will enable the microcontroller to have the RTC active during Power-down mode.
Power-down current is increased with RTC active. However, it is significantly lower than in
Idle mode.
A Power Control for Peripherals feature allows individual peripherals to be turned off if
they are not needed in the application, resulting in additional power savings during active
and Idle mode.
6.19.9 VPB bus
The VPB divider determines the relationship between the processor clock (CCLK) and the
clock used by peripheral devices (PCLK). The VPB divider serves two purposes. The first
is to provide peripherals with the desired PCLK via VPB bus so that they can operate at
the speed chosen for the ARM processor. In order to achieve this, the VPB bus may be
slowed down to 1⁄2 to 1⁄4 of the processor clock rate. Because the VPB bus must work
properly at power-up (and its timing cannot be altered if it does not work since the VPB
divider control registers reside on the VPB bus), the default condition at reset is for the
VPB bus to run at 1⁄4 of the processor clock rate. The second purpose of the VPB divider
is to allow power savings when an application does not require any peripherals to run at
the full processor rate. Because the VPB divider is connected to the PLL output, the PLL
remains active (if it was running) during Idle mode.
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6.20 Emulation and debugging
The LPC2141/42/44/46/48 support emulation and debugging via a JTAG serial port. A
trace port allows tracing program execution. Debugging and trace functions are
multiplexed only with GPIOs on Port 1. This means that all communication, timer and
interface peripherals residing on Port 0 are available during the development and
debugging phase as they are when the application is run in the embedded system itself.
6.20.1 EmbeddedICE
Standard ARM EmbeddedICE logic provides on-chip debug support. The debugging of
the target system requires a host computer running the debugger software and an
EmbeddedICE protocol convertor. EmbeddedICE protocol convertor converts the remote
debug protocol commands to the JTAG data needed to access the ARM core.
The ARM core has a Debug Communication Channel (DCC) function built-in. The DCC
allows a program running on the target to communicate with the host debugger or another
separate host without stopping the program flow or even entering the debug state. The
DCC is accessed as a co-processor 14 by the program running on the ARM7TDMI-S
core. The DCC allows the JTAG port to be used for sending and receiving data without
affecting the normal program flow. The DCC data and control registers are mapped in to
addresses in the EmbeddedICE logic.
6.20.2 Embedded trace
Since the LPC2141/42/44/46/48 have significant amounts of on-chip memory, it is not
possible to determine how the processor core is operating simply by observing the
external pins. The Embedded Trace Macrocell (ETM) provides real-time trace capability
for deeply embedded processor cores. It outputs information about processor execution to
the trace port.
The ETM is connected directly to the ARM core and not to the main AMBA system bus. It
compresses the trace information and exports it through a narrow trace port. An external
trace port analyzer must capture the trace information under software debugger control.
Instruction trace (or PC trace) shows the flow of execution of the processor and provides a
list of all the instructions that were executed. Instruction trace is significantly compressed
by only broadcasting branch addresses as well as a set of status signals that indicate the
pipeline status on a cycle by cycle basis. Trace information generation can be controlled
by selecting the trigger resource. Trigger resources include address comparators,
counters and sequencers. Since trace information is compressed the software debugger
requires a static image of the code being executed. Self-modifying code can not be traced
because of this restriction.
6.20.3 RealMonitor
RealMonitor is a configurable software module, developed by ARM Inc., which enables
real-time debug. It is a lightweight debug monitor that runs in the background while users
debug their foreground application. It communicates with the host using the DCC, which is
present in the EmbeddedICE logic. The LPC2141/42/44/46/48 contain a specific
configuration of RealMonitor software programmed into the on-chip flash memory.
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7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).[1]
Symbol
Parameter
VDD
supply voltage
VDDA
analog 3.3 V pad supply voltage
Vi(VBAT)
input voltage on pin VBAT
Vi(VREF)
input voltage on pin VREF
Conditions
[2]
for the RTC
Min
Max
Unit
−0.5
+3.6
V
−0.5
+4.6
V
−0.5
+4.6
V
−0.5
+4.6
V
[3]
−0.5
+5.1
V
5 V tolerant I/O
pins
[4][5]
−0.5
+6.0
V
other I/O pins
[4][6]
−0.5
VDD + 0.5
V
supply current
[7][8]
-
100
mA
ISS
ground current
[8][9]
-
100
mA
Tstg
storage temperature
−40
+125
°C
Ptot(pack)
total power dissipation (per package)
-
1.5
W
analog input voltage
VIA
input voltage
VI
IDD
[10]
based on package
heat transfer, not
device power
consumption
[1]
The following applies to the Limiting values:
a) This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive
static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maximum.
b) Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless
otherwise noted.
[2]
Core and external rail.
[3]
On ADC related pins.
[4]
Including voltage on outputs in 3-state mode.
[5]
Only valid when the VDD supply voltage is present.
[6]
Not to exceed 4.6 V.
[7]
Per supply pin.
[8]
The peak current is limited to 25 times the corresponding maximum current.
[9]
Per ground pin.
[10] Dependent on package type.
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8. Static characteristics
Table 5.
Static characteristics
Ta = −40 °C to +85 °C for commercial applications, unless otherwise specified.
Symbol
Parameter
VDD
supply voltage
VDDA
analog 3.3 V pad supply
voltage
Vi(VBAT)
input voltage on pin VBAT
Vi(VREF)
input voltage on pin VREF
Conditions
[2]
[3]
Min
Typ[1]
Max
Unit
3.0
3.3
3.6
V
3.0
3.3
3.6
V
2.0
3.3
3.6
V
2.5
3.3
VDDA
V
Standard port pins, RESET, RTCK
IIL
LOW-level input current
VI = 0 V; no pull-up
-
-
3
µA
IIH
HIGH-level input current
VI = VDD; no pull-down
-
-
3
µA
IOZ
OFF-state output current
VO = 0 V; VO = VDD; no
pull-up/down
-
-
3
µA
Ilatch
I/O latch-up current
−(0.5VDD) < V < (1.5VDD)
-
-
100
mA
0
-
5.5
V
0
-
VDD
V
Tj < 125 °C
[4][5][6]
VI
input voltage
pin configured to provide a
digital function
VO
output voltage
output active
VIH
HIGH-level input voltage
2.0
-
-
V
VIL
LOW-level input voltage
-
-
0.8
V
Vhys
hysteresis voltage
-
0.4
-
V
VOH
HIGH-level output voltage IOH = −4 mA
[7]
VDD − 0.4
-
-
V
VOL
LOW-level output voltage
IOL = −4 mA
[7]
-
-
0.4
V
IOH
HIGH-level output current VOH = VDD − 0.4 V
[7]
−4
-
-
mA
IOL
LOW-level output current
VOL = 0.4 V
[7]
4
-
-
mA
-
-
−45
mA
IOHS
HIGH-level short-circuit
output current
VOH = 0 V
[8]
IOLS
LOW-level short-circuit
output current
VOL = VDDA
[8]
-
-
50
mA
Ipd
pull-down current
VI = 5 V
[9]
10
50
150
µA
VI = 0 V
[10]
−15
−50
−85
µA
0
0
0
µA
Ipu
pull-up current
VDD < VI < 5 V
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Table 5.
Static characteristics …continued
Ta = −40 °C to +85 °C for commercial applications, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ[1]
Max
IDD(act)
active mode supply
current
VDD = 3.3 V; Ta = 25 °C;
code
-
15
50
CCLK = 60 MHz
(other parameters as above)
-
40
70
VDD = 3.3 V; Ta = 25 °C;
code executed from flash;
USB enabled and active; all
other peripherals disabled
CCLK = 12 MHz
-
27
70
CCLK = 60 MHz
(other parameters as above)
-
57
90
mA
-
40
100
µA
-
250
500
µA
-
15
30
Unit
while(1){}
executed from flash; no
active peripherals
CCLK = 10 MHz
mA
mA
Power-down mode supply VDD = 3.3 V; Ta = 25 °C
current
VDD = 3.3 V; Ta = 85 °C
IDD(pd)
[11]
Power-down mode battery RTC clock = 32 kHz
supply current
(from RTCX pins); Ta = 25 °C
IBATpd
µA
VDD = 3.0 V; Vi(VBAT) = 2.5 V
VDD = 3.0 V; Vi(VBAT) = 3.0 V
active mode battery
supply current
IBATact
[11]
CCLK = 60 MHz;
PCLK = 15 MHz;
PCLK enabled to RTCK;
RTC clock = 32 kHz
(from RTCX pins); Ta = 25 °C
-
20
40
-
78
-
optimized active mode
battery supply current
PCLK disabled to RTCK in
the PCONP register;
RTC clock = 32 kHz
(from RTCX pins);
Ta = 25 °C; Vi(VBAT) = 3.3 V
[11][12]
-
23
-
µA
CCLK = 25 MHz
CCLK = 60 MHz
I2C-bus
µA
µA
VDD = 3.0 V; Vi(VBAT) = 3.0 V
IBATact(opt)
mA
-
30
-
µA
pins
VIH
HIGH-level input voltage
0.7VDD
-
-
V
VIL
LOW-level input voltage
-
-
0.3VDD
V
Vhys
hysteresis voltage
-
V
VOL
LOW-level output voltage
IOLS = 3 mA
ILI
input leakage current
VI = VDD
VI = 5 V
-
0.5VDD
[7]
-
-
0.4
V
[13]
-
2
4
µA
-
10
22
µA
Oscillator pins
Vi(XTAL1)
input voltage on pin
XTAL1
0
-
1.8
V
Vo(XTAL2)
output voltage on pin
XTAL2
0
-
1.8
V
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Table 5.
Static characteristics …continued
Ta = −40 °C to +85 °C for commercial applications, unless otherwise specified.
Min
Typ[1]
Max
Unit
input voltage on pin
RTCX1
0
-
1.8
V
output voltage on pin
RTCX2
0
-
1.8
V
-
-
±10
µA
Symbol
Parameter
Vi(RTCX1)
Vo(RTCX2)
Conditions
USB pins
IOZ
OFF-state output current
0 V < VI < 3.3 V
on the USB connector
VBUS
bus supply voltage
-
-
5.25
V
VDI
differential input sensitivity |(D+) − (D−)|
0.2
-
-
V
VCM
differential common mode includes VDI range
voltage range
0.8
-
2.5
V
Vth(rs)se
single-ended receiver
switching threshold
voltage
0.8
-
2.0
V
VOL
LOW-level output voltage
-
-
0.3
V
VOH
HIGH-level output voltage RL of 15 kΩ to GND
2.8
-
3.6
V
Ctrans
transceiver capacitance
pin to GND
-
-
20
pF
ZDRV
driver output impedance
for driver which is not
high-speed capable
steady state drive
29
-
44
Ω
Rpu
pull-up resistance
SoftConnect = ON
1.1
-
1.9
kΩ
RL of 1.5 kΩ to 3.6 V
[14]
[1]
Typical ratings are not guaranteed. The values listed are at room temperature (25 ˚C), nominal supply voltages.
[2]
Core and external rail.
[3]
The RTC typically fails when Vi(VBAT) drops below 1.6 V.
[4]
Including voltage on outputs in 3-state mode.
[5]
VDD supply voltages must be present.
[6]
3-state outputs go into 3-state mode when VDD is grounded.
[7]
Accounts for 100 mV voltage drop in all supply lines.
[8]
Only allowed for a short time period.
[9]
Minimum condition for VI = 4.5 V, maximum condition for VI = 5.5 V.
[10] Applies to P1.16 to P1.31.
[11] On pin VBAT.
[12] Optimized for low battery consumption.
[13] To VSS.
[14] Includes external resistors of 18 Ω ± 1 % on D+ and D−.
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NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
Table 6.
ADC static characteristics
VDDA = 2.5 V to 3.6 V; Ta = −40 °C to +85 °C unless otherwise specified. ADC frequency 4.5 MHz.
Symbol
Parameter
VIA
Cia
Min
Typ
Max
Unit
analog input voltage
0
-
VDDA
V
analog input capacitance
-
-
1
pF
[1][2][3]
-
-
±1
LSB
integral non-linearity
[1][4]
-
-
±2
LSB
EO
offset error
[1][5]
-
-
±3
LSB
EG
gain error
[1][6]
-
-
±0.5
%
absolute error
[1][7]
-
-
±4
LSB
[8]
-
-
40
kΩ
differential linearity error
ED
EL(adj)
ET
Rvsi
Conditions
voltage source interface
resistance
[1]
Conditions: VSSA = 0 V, VDDA = 3.3 V.
[2]
The ADC is monotonic, there are no missing codes.
[3]
The differential linearity error (ED) is the difference between the actual step width and the ideal step width. See Figure 6.
[4]
The integral non-linearity (EL(adj)) is the peak difference between the center of the steps of the actual and the ideal transfer curve after
appropriate adjustment of gain and offset errors. See Figure 6.
[5]
The offset error (EO) is the absolute difference between the straight line which fits the actual curve and the straight line which fits the
ideal curve. See Figure 6.
[6]
The gain error (EG) is the relative difference in percent between the straight line fitting the actual transfer curve after removing offset
error, and the straight line which fits the ideal transfer curve. See Figure 6.
[7]
The absolute error (ET) is the maximum difference between the center of the steps of the actual transfer curve of the non-calibrated ADC
and the ideal transfer curve. See Figure 6.
[8]
See Figure 7.
LPC2141_42_44_46_48_3
Product data sheet
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LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
offset
error
EO
gain
error
EG
1023
1022
1021
1020
1019
1018
(2)
7
code
out
(1)
6
5
(5)
4
(4)
3
(3)
2
1 LSB
(ideal)
1
0
1
2
3
4
5
offset error
EO
6
7
1018
1019
1020
1021
1022
1023
1024
Via (LSBideal)
1 LSB =
VDDA − VSSA
1024
002aab136
(1) Example of an actual transfer curve.
(2) The ideal transfer curve.
(3) Differential linearity error (ED).
(4) Integral non-linearity (EL(adj)).
(5) Center of a step of the actual transfer curve.
Fig 6. ADC characteristics
LPC2141_42_44_46_48_3
Product data sheet
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Rev. 03 — 19 October 2007
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LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
LPC2141/42/44/46/48
20 kΩ
ADx.y
ADx.ySAMPLE
3 pF
Rvsi
5 pF
VEXT
VSS
002aab834
Fig 7. Suggested ADC interface - LPC2141/42/44/46/48 ADx.y pin
LPC2141_42_44_46_48_3
Product data sheet
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NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
9. Dynamic characteristics
Table 7.
Dynamic characteristics of USB pins (full-speed)
CL = 50 pF; Rpu = 1.5 kΩ on D+ to VDD; unless otherwise specified
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tr
rise time
10 % to 90 %
4
-
20
ns
tf
fall time
10 % to 90 %
4
-
20
ns
tFRFM
differential rise and fall time
matching
(tr/tf)
90
-
110
%
VCRS
output signal crossover voltage
1.3
-
2.0
V
tFEOPT
source SE0 interval of EOP
see Figure 9
160
-
175
ns
tFDEOP
source jitter for differential transition
to SE0 transition
see Figure 9
−2
-
+5
ns
tJR1
receiver jitter to next transition
−18.5
-
+18.5
ns
tJR2
receiver jitter for paired transitions
10 % to 90 %
−9
-
+9
ns
tEOPR1
EOP width at receiver
must reject as
EOP; see
Figure 9
[1]
40
-
-
ns
tEOPR2
EOP width at receiver
must accept as
EOP; see
Figure 9
[1]
82
-
-
ns
Min
Typ[2]
Max
Unit
[1]
Characterized but not implemented as production test. Guaranteed by design.
Table 8.
Dynamic characteristics
Ta = −40 °C to +85 °C for commercial applications; VDD over specified ranges[1]
Symbol
Parameter
Conditions
External clock
fosc
oscillator frequency
10
-
25
MHz
Tcy(clk)
clock cycle time
40
-
100
ns
tCHCX
clock HIGH time
Tcy(clk) × 0.4
-
-
ns
tCLCX
clock LOW time
Tcy(clk) × 0.4
-
-
ns
tCLCH
clock rise time
-
-
5
ns
tCHCL
clock fall time
-
-
5
ns
Port pins (P0.2, P0.3, P0.11, and P0.14)
tr(o)
output rise time
-
10
-
ns
tf(o)
output fall time
-
10
-
ns
20 + 0.1 × Cb[3]
-
-
ns
I2C-bus
pins (P0.2, P0.3, P0.11, and P0.14)
output fall time
tf(o)
VIH to VIL
[1]
Parameters are valid over operating temperature range unless otherwise specified.
[2]
Typical ratings are not guaranteed. The values listed are at room temperature (25 °C), nominal supply voltages.
[3]
Bus capacitance Cb in pF, from 10 pF to 400 pF.
LPC2141_42_44_46_48_3
Product data sheet
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NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
9.1 Timing
VDD − 0.5 V
0.45 V
0.2VDD + 0.9 V
0.2VDD − 0.1 V
tCHCL
tCHCX
tCLCH
tCLCX
Tcy(clk)
002aaa907
VDD = 1.8 V
Fig 8. External clock timing
tPERIOD
crossover point
extended
crossover point
differential
data lines
source EOP width: tFEOPT
differential data to
SE0/EOP skew
n × tPERIOD + tFDEOP
receiver EOP width: tEOPR1, tEOPR2
002aab561
Fig 9. Differential data-to-EOP transition skew and EOP width
10. Application information
10.1 Suggested USB interface solutions
VDD
CONNECT
soft-connect switch
LPC2141/42/
44/46/48
R1
1.5 kΩ
VBUS
D+
RS = 33 Ω
D−
RS = 33 Ω
USB-B
connector
VSS
002aab563
Fig 10. LPC2141/42/44/46/48 USB interface using the CONNECT function on pin 17
LPC2141_42_44_46_48_3
Product data sheet
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Rev. 03 — 19 October 2007
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LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
VDD
R2
LPC2141/42/
44/46/48
UP_LED
R1
1.5 kΩ
VBUS
D+
RS = 33 Ω
D−
RS = 33 Ω
USB-B
connector
VSS
002aab562
Fig 11. LPC2141/42/44/46/48 USB interface using the UP_LED function on pin 17
LPC2141_42_44_46_48_3
Product data sheet
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Rev. 03 — 19 October 2007
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LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
11. Package outline
LQFP64: plastic low profile quad flat package; 64 leads; body 10 x 10 x 1.4 mm
SOT314-2
c
y
X
A
48
33
49
32
ZE
e
E HE
A
A2
(A 3)
A1
wM
θ
bp
pin 1 index
64
Lp
L
17
detail X
16
1
ZD
e
v M A
wM
bp
D
B
HD
v M B
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
mm
1.6
0.20
0.05
1.45
1.35
0.25
0.27
0.17
0.18
0.12
10.1
9.9
10.1
9.9
0.5
HD
HE
12.15 12.15
11.85 11.85
L
Lp
v
w
y
1
0.75
0.45
0.2
0.12
0.1
Z D (1) Z E (1)
1.45
1.05
1.45
1.05
θ
7o
o
0
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT314-2
136E10
MS-026
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
00-01-19
03-02-25
Fig 12. Package outline SOT314-2 (LQFP64)
LPC2141_42_44_46_48_3
Product data sheet
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NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
12. Abbreviations
Table 9.
Acronym list
Acronym
Description
ADC
Analog-to-Digital Converter
BOD
Brown-Out Detection
CPU
Central Processing Unit
DAC
Digital-to-Analog Converter
DCC
Debug Communications Channel
DMA
Direct Memory Access
EOP
End Of Packet
FIFO
First In, First Out
GPIO
General Purpose Input/Output
PLL
Phase-Locked Loop
POR
Power-On Reset
PWM
Pulse Width Modulator
RAM
Random Access Memory
SE0
Single Ended Zero
SPI
Serial Peripheral Interface
SRAM
Static Random Access Memory
SSP
Synchronous Serial Port
UART
Universal Asynchronous Receiver/Transmitter
USB
Universal Serial Bus
VPB
VLSI Peripheral Bus
LPC2141_42_44_46_48_3
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Single-chip 16-bit/32-bit microcontrollers
13. Revision history
Table 10.
Revision history
Document ID
Release date
Data sheet status
Change notice Supersedes
LPC2141_42_44_46_48_3
20071019
Product data sheet
-
Modifications:
LPC2141_42_44_46_48_2
•
The format of this data sheet has been redesigned to comply with the new identity
guidelines of NXP Semiconductors.
•
Legal texts have been adapted to the new company name where appropriate.
LPC2141_42_44_46_48_2
20060828
Product data sheet
-
LPC2141_42_44_46_48_1
LPC2141_42_44_46_48_1
20051003
Preliminary data sheet
-
-
LPC2141_42_44_46_48_3
Product data sheet
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LPC2141/42/44/46/48
NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
14. Legal information
14.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
14.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
14.3 Disclaimers
General — Information in this document is believed to be accurate and
reliable. However, NXP Semiconductors does not give any representations or
warranties, expressed or implied, as to the accuracy or completeness of such
information and shall have no liability for the consequences of use of such
information.
NXP Semiconductors accepts no liability for inclusion and/or use of NXP
Semiconductors products in such equipment or applications and therefore
such inclusion and/or use is at the customer’s own risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) may cause permanent
damage to the device. Limiting values are stress ratings only and operation of
the device at these or any other conditions above those given in the
Characteristics sections of this document is not implied. Exposure to limiting
values for extended periods may affect device reliability.
Terms and conditions of sale — NXP Semiconductors products are sold
subject to the general terms and conditions of commercial sale, as published
at http://www.nxp.com/profile/terms, including those pertaining to warranty,
intellectual property rights infringement and limitation of liability, unless
explicitly otherwise agreed to in writing by NXP Semiconductors. In case of
any inconsistency or conflict between information in this document and such
terms and conditions, the latter will prevail.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
14.4 Trademarks
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
malfunction of a NXP Semiconductors product can reasonably be expected to
result in personal injury, death or severe property or environmental damage.
SoftConnect — is a trademark of NXP B.V.
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
I2C-bus — logo is a trademark of NXP B.V.
GoodLink — is a trademark of NXP B.V.
15. Contact information
For additional information, please visit: http://www.nxp.com
For sales office addresses, send an email to: [email protected]
LPC2141_42_44_46_48_3
Product data sheet
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NXP Semiconductors
Single-chip 16-bit/32-bit microcontrollers
16. Contents
1
2
2.1
3
3.1
4
5
5.1
5.2
6
6.1
6.2
6.3
6.4
6.5
6.5.1
6.6
6.7
6.7.1
6.8
6.8.1
6.9
6.9.1
6.10
6.10.1
6.11
6.11.1
6.12
6.12.1
6.13
6.13.1
6.14
6.14.1
6.15
6.15.1
6.16
6.16.1
6.17
6.17.1
6.18
6.18.1
6.19
6.19.1
6.19.2
6.19.3
6.19.4
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Key features . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information . . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 7
Functional description . . . . . . . . . . . . . . . . . . 12
Architectural overview. . . . . . . . . . . . . . . . . . . 12
On-chip flash program memory . . . . . . . . . . . 12
On-chip static RAM. . . . . . . . . . . . . . . . . . . . . 13
Memory map. . . . . . . . . . . . . . . . . . . . . . . . . . 13
Interrupt controller . . . . . . . . . . . . . . . . . . . . . 14
Interrupt sources. . . . . . . . . . . . . . . . . . . . . . . 14
Pin connect block . . . . . . . . . . . . . . . . . . . . . . 14
Fast general purpose parallel I/O (GPIO) . . . . 15
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10-bit ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10-bit DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
USB 2.0 device controller . . . . . . . . . . . . . . . . 16
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
UARTs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
I2C-bus serial I/O controller . . . . . . . . . . . . . . 17
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SPI serial I/O controller. . . . . . . . . . . . . . . . . . 18
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SSP serial I/O controller . . . . . . . . . . . . . . . . . 18
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
General purpose timers/external event
counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Watchdog timer. . . . . . . . . . . . . . . . . . . . . . . . 19
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Real-time clock . . . . . . . . . . . . . . . . . . . . . . . . 19
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Pulse width modulator . . . . . . . . . . . . . . . . . . 20
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
System control . . . . . . . . . . . . . . . . . . . . . . . . 21
Crystal oscillator . . . . . . . . . . . . . . . . . . . . . . . 21
PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Reset and wake-up timer . . . . . . . . . . . . . . . . 21
Brownout detector. . . . . . . . . . . . . . . . . . . . . . 22
6.19.5
6.19.6
6.19.7
6.19.8
6.19.9
6.20
6.20.1
6.20.2
6.20.3
7
8
9
9.1
10
10.1
11
12
13
14
14.1
14.2
14.3
14.4
15
16
Code security . . . . . . . . . . . . . . . . . . . . . . . . .
External interrupt inputs . . . . . . . . . . . . . . . . .
Memory mapping control . . . . . . . . . . . . . . . .
Power control . . . . . . . . . . . . . . . . . . . . . . . . .
VPB bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emulation and debugging. . . . . . . . . . . . . . . .
EmbeddedICE . . . . . . . . . . . . . . . . . . . . . . . .
Embedded trace. . . . . . . . . . . . . . . . . . . . . . .
RealMonitor . . . . . . . . . . . . . . . . . . . . . . . . . .
Limiting values . . . . . . . . . . . . . . . . . . . . . . . .
Static characteristics . . . . . . . . . . . . . . . . . . .
Dynamic characteristics . . . . . . . . . . . . . . . . .
Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application information . . . . . . . . . . . . . . . . .
Suggested USB interface solutions . . . . . . . .
Package outline . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . .
Revision history . . . . . . . . . . . . . . . . . . . . . . .
Legal information . . . . . . . . . . . . . . . . . . . . . .
Data sheet status . . . . . . . . . . . . . . . . . . . . . .
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . .
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact information . . . . . . . . . . . . . . . . . . . .
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
22
23
23
23
24
24
24
24
25
26
32
33
33
33
35
36
37
38
38
38
38
38
38
39
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2007.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 19 October 2007
Document identifier: LPC2141_42_44_46_48_3