11
PIN #
126
127
128
NAME
FUNCTION
BUFFER
TYPE
IO8
IO8
IO8
BUFFER TYPE
PER FUNCTION
(NOTE 6)
nRTS2 /GP55
nCTS2 /GP56
nDTR2 /GP57
Request to Send 2 /GPIO
Clear to Send 2 /GPIO
Data Terminal Ready 2 /GPIO
POWER PINS
+3.3 Volt Supply Voltage
O8 /(I/O8/OD8)
I /(I/O8/OD8)
O8 /(I/O8/OD8)
19,80,
121
15
46
6,32,
57,87,
99
52
VCC
VTR
VBAT
VSS
Standby Supply Voltage
Battery Voltage
Ground
AVSS
Analog Ground
CLOCK PINS
16
20
Note 1: The nLPCPD pin may be pulled high. The LPC interface will function properly if the
nPCI_RESET signal follows the protocol defined for the nLRESET signal in the “Low Pin
Count Interface Specification”.
Note 2: These pins default to a reserved function and must be programmed to their GPIO function
immediately following power-up.
Note 3: The nKBDRST and A20M functions must default to high on VCC POR and Hard Reset.
Note 4: This pin requires an external pulldown resistor to put the base I/O address for configuration at
0x02E. An external pullup resistor is required to move the base I/O address for configuration
to 0x04E.
Note 5: The TXD2 pin will power up as an output and low following a VCC POR and Hard Reset due
to its IR functionality.
Note 6: Buffer types per function on multiplexed pins are separated by a slash “/”. Buffer types in
parenthesis represent multiple buffer types for a single pin function.
Note 7: If the 32kHz clock is not used, the CLKI32 pin must be grounded. Bit 0 of the CLKI32
configuration register located at 0xF0 in Logical Device A must be set to ‘1’.
Note 8: The GP35/IRTX2 pin powers up as an output and high on VTR POR, VCC POR and Hard
Reset. This pin and GP34/IRRX2 pin are not recommended to be used for IR functionality.
CLKI32
CLOCKI
32.768kHz Standby Clock Input
14.318MHz Clock Input
IS
IS
IS
IS
Buffer Type Descriptions
Engineering Note: The buffer type values are specified at VCC=3.3V
IO12
Input/Output, 12mA sink, 6mA source.
IS/O12
Input with Schmitt Trigger/Output, 12mA sink, 6mA source.
O12
Output, 12mA sink, 6mA source.
OD12
Open Drain Output, 12mA sink.
O6
Output, 6mA sink, 3mA source.
IO8
Input/Output, 8mA sink, 4mA source.
IS/O8
Input with Schmitt Trigger/Output, 8mA sink, 4mA source.
O8
Output, 8mA sink, 4mA source.
OD8
Open Drain Output, 8mA sink.