LPC2919 PHILIPS [NXP Semiconductors], LPC2919 Datasheet - Page 10

• Manufacturer Part Number: LPC2919
• Description: ARM9 microcontroller with CAN and LIN
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
Table 3.
7. Functional description
1.
LPC2917_19_1
Preliminary data sheet
Symbol
P0.18
P0.19
P3.4
P3.5
P2.18
P2.19
P0.20
P0.21
P0.22
V
P0.23
P2.20
TDI
SS(IO)
Only for 1.8 V power sources
LQFP144 pin assignment
7.1.1 Reset and power-up behavior
7.1.2 Reset strategy
7.1 Reset, debug, test and power description
Pin
132
133
134
135
136
137
138
139
140
141
142
143
144
The LPC2917/19 contains external reset input and internal power-up reset circuits. This
ensures that a reset is extended internally until the oscillators and flash have reached a
stable state. See
Section 12
the reset pin.
Table 4.
At activation of the RSTN pin the JTAGSEL pin is sensed as logic LOW. If this is the case
the LPC2917/19 is assumed to be connected to debug hardware, and internal circuits
re-program the source for the BASE_SYS_CLK to be the crystal oscillator instead of the
Low-Power Ring Oscillator (LP_OSC). This is required because the clock rate when
running at LP_OSC speed is too low for the external debugging environment.
The LPC2917/19 contains a central module, the Reset Generator Unit (RGU) in the
Power, Clock and Reset Control Subsystem (PCRSS), which controls all internal reset
signals towards the peripheral modules. The RGU provides individual reset control as well
as the monitoring functions needed for tracing a reset back to source.
Symbol
RSTN
Description
GPIO 0, pin 18
GPIO 0, pin 19
GPIO 3, pin 4
GPIO 3, pin 5
GPIO 2, pin 18
GPIO 2, pin 19
GPIO 0, pin 20
GPIO 0, pin 21
GPIO 0, pin 22
ground for I/O
GPIO 0, pin 23
GPIO 2, pin 20
IEEE 1149.1 data in, pulled up internally.
Function 0 (default) Function 1
Reset pin
for characteristics of the several start-up and initialization times.
…continued
Direction
in
Section 11
Rev. 1.01 — 15 November 2007
ADC2 IN2
ADC2 IN3
TIMER3 MAT2
TIMER3 MAT3
-
-
ADC2 IN4
ADC2 IN5
ADC2 IN6
ADC2 IN7
-
Description
external reset input, active LOW; pulled up internally
for trip levels of the internal power-up reset circuit
ARM9 microcontroller with CAN and LIN
Function 2
PWM2 MAT0
PWM2 MAT1
PWM2 MAT4
PWM2 MAT5
PWM1 CAP1
PWM1 CAP2
PWM2 MAT2
PWM2 MAT3
PWM2 MAT4
PWM2 MAT5
PWM2 CAP0
LPC2917/19
Function 3
CAN1 TxD
CAN1 RxD
EXTBUS A14
EXTBUS A15
EXTBUS D16
EXTBUS D17
EXTBUS A16
EXTBUS A17
EXTBUS A18
EXTBUS A19
EXTBUS D18
© NXP B.V. 2007. All rights reserved.
Table 4
1
. See
shows
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