TOTAL
PINS
BUFFER
TYPE
NAME
Power Good
SYMBOL
PWRGD
DESCRIPTION
1
IP
This active high input indicates
that the positive supply voltage
VCC is valid. For normal device
operation, PWRGD must be
active. When PWRGD is inactive,
all device inputs are disconnected
and placed into a low power state;
all outputs are put into a high-
impedance state. Note: The
crystal oscillator pins are
unaffected by PWRGD. The
contents of all registers are
preserved as long as VCC has a
valid value. Output driver current
drain when PWRGD is inactive
drops to ISTDBY - standby current.
The PWRGD input has an internal
30#A pull-up.
No Connect
4
N/C
-
No internal connections are made
to these pins.
INFRARED INTERFACE (3)
Infrared Rx3
1
1
1
IRRX
I
This is the infrared port receiver
input pin.
Infrared Tx1,2
IRTX
O12PD
O12/I
This is the infrared port transmitter
output pin.
Infrared Mode/IRRX31
IRMODE/IRRX3
This is the infrared port secondary
receiver input channel or a
transceiver mode control pin,
depending on the state of the
transceiver module interface type
select (TABLE 27).
POWER PINS (6)
+3.3V Digital Supply
Voltage
2
1
3
VCC
VIO
Positive Supply Voltage
I/O Interface Supply
Voltage1
Positive I/O Interface Supply
Voltage
Ground
VSS
Ground Supply
10
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