
Introduction
30
November 2002 Revised January 2005
SPRS205D
Table 23. Signal Descriptions (Continued)
TERMINAL
NAME
RESET
CONDITION
BK
FUNCTION
I/O/Z
MULTIPLEXED
SIGNAL NAME
TEST/EMULATION PINS (CONTINUED)
EMU1/OFF
I/O/Z
Emulator 1 pin/disable all outputs. When TRST is driven high, EMU1/OFF
is used as an interrupt to or from the emulator system and is defined as I/O
by way of IEEE standard 1149.1 scan system. When TRST is driven low,
EMU1/OFF is configured as OFF. The EMU1/OFF signal, when
active-low, puts all output drivers into the high-impedance state. Note that
OFF is used exclusively for testing and emulation purposes (not for
multiprocessing applications). Therefore, for the OFF condition, the
following apply: TRST = low, EMU0 = high, EMU1/OFF = low
PU
Input
SUPPLY PINS
CV
DD
DV
DD
S
Digital Power, + V
DD
. Dedicated power supply for the core CPU.
Digital Power, + V
DD
. Dedicated power supply for the I/O pins.
Digital Power, + V
DD
. Dedicated power supply for the I/O of the USB
module (DP, DN , and PU)
S
USBV
DD
S
RDV
DD
S
Digital Power, + V
DD
. Dedicated power supply for the I/O pins of the RTC
module.
RCV
DD
AV
DD
S
Digital Power, + V
DD
. Dedicated power supply for the RTC module
Analog Power, + V
DD
. Dedicated power supply for the 10-bit A/D.
Analog Digital Power, + V
DD
. Dedicated power supply for the digital portion
of the 10-bit A/D.
S
ADV
DD
S
USBPLLV
DD
V
SS
AV
SS
S
Digital Power, + V
DD
. Dedicated power supply pin for the USB PLL.
Digital Ground. Dedicated ground for the I/O and core pins.
S
S
Analog Ground. Dedicated ground for the 10-bit A/D.
ADV
SS
S
Analog Digital Ground. Dedicated ground for the digital portion of the10-bit
A/D.
USBPLLV
SS
S
Digital Ground. Dedicated ground for the USB PLL.
MISCELLANEOUS
NC
I = Input, O = Output, S = Supply, Hi-Z = High-impedance
BK = bus keeper (the bus keeper maintains the previous voltage level during reset or while the output pin is not driven), PU = pullup,
PD = pulldown, H = hysteresis input buffer, FS = fail-safe buffer
No connection