
Introduction
92
December 2003 Revised March 2005
SPRS231D
Table 25. Signal Descriptions (Continued)
SIGNAL
TYPE
DESCRIPTION
ZZG
BALL#
ZDY
BALL#
GENERAL-PURPOSE TIMERS
TIMER.EVENT3
L14
P19
Event capture input signal for GP timer 3
I
TIMER.EVENT4
M17
P20
Event capture input signal for GP timer 4
I
TIMER.EXTCLK
L16
N18
Input clock for the GP timers
I
TIMER.PWM2
K16
M20
PWM output of GP timer 2
O
TIMER.PWM1
K15
L14
PWM output of GP timer 1
O
TIMER.PWM0
K17
M18
PWM output of GP timer 0
O
EMBEDDED TRACE MACROCELL
(ETM
) INTERFACE
ETM.CLK
G16
J15
ETM9
trace clock
O
ETM.PSTAT[5:0]
K13 M16
L13 J13
J12 K12
N20 M14
P18 L18
L15 M19
ETM9 trace pipe state bits
O
ETM.D[7:0]
H16 H15
H17 J11
H13 J14
J16 J17
J18 J19
J14 K18
K19 K15
K14 L19
ETM9 trace packet bits
O
ETM.SYNC[1:0]
L15 H12
M15 H19
ETM9 trace synchronization bits
O
DEVICE CLOCK PINS
CLK32K_IN
T11
P13
32-kHz clock input. Digital CMOS 32-kHz clock input driven by an external
32-kHz oscillator if the internal 32-kHz oscillator is not used.
I
CLK32K_OUT
U12
R13
32-kHz clock output. Clock output reflecting the internal 32-kHz clock.
O
OSC32K_IN
U11
V13
32-kHz crystal XI connection. Analog clock input to 32-kHz oscillator for use
with external crystal.
I
OSC32K_OUT
U10
AA13
32-kHz crystal XO connection. Analog output from 32-kHz oscillator for use
with external crystal.
O
SYS_CLK_IN
P5
Y4
Reserved
I
SYS_CLK_OUT
F10
B15
Reserved
O
OSC1_IN
R2
Y2
Base crystal XI connection. Analog input to base oscillator for use with
external crystal or to be driven by external 19.2-MHz or 12/13-MHz
oscillator. (Reset Mode 0)
I
OSC1_OUT
P2
W3
Base crystal XO connection. Analog output from base oscillator for use with
external 19.2-MHz or 12/13-MHz crystal. (Reset Mode 0)
O
BCLK
L10
Y15
General-purpose clock output that can be configured to run at 12 or 13 MHz
(depending on base oscillator frequency) or 48 MHz. BCLK can be
configured to drive constantly or only when the BCLKREQ signal is asserted
active-high.
O
BCLKREQ
R12
W15
BCLK clock request. Active-high request input that allows an external device
to request that BCLK be driven.
I
MCLK
U3
V5
General-purpose master clock output that may be configured to run at 12 or
13 MHz (depending on base oscillator frequency) or 48 MHz. MCLK can be
configured to drive constantly or only when the MCLKREQ signal is asserted
active-high.
O
MCLKREQ
T7
R10
MCLK clock request. Active-high request input that allows an external device
to request that MCLK be driven.
I
I = Input, O = Output, Z = High-Impedance
Embedded Trace Macrocell, ETM, and ETM9 are trademarks of ARM Limited in the EU and other countries.