LPC47B34X 데이터 시트보기 (PDF) - SMSC -> Microchip

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LPC47B34X

128 Pin Enhanced Super I/O with LPC Interface for Consumer Applications

SMSC -> Microchip 

PIN #

NAME

FUNCTION

BUFFER

TYPE

BUFFER TYPE

PER FUNCTION

(NOTE 6)

126

nRTS2 /GP55

Request to Send 2 /GPIO

IO8

O8 /(I/O8/OD8)

127

nCTS2 /GP56

Clear to Send 2 /GPIO

IO8

I /(I/O8/OD8)

128

nDTR2 /GP57

Data Terminal Ready 2 /GPIO

IO8

O8 /(I/O8/OD8)

POWER PINS

19,80, VCC

+3.3 Volt Supply Voltage

121

15

VTR

Standby Supply Voltage

46

VBAT

Battery Voltage

6,32, VSS

Ground

57,87,

99

52

AVSS

Analog Ground

CLOCK PINS

16

CLKI32

32.768kHz Standby Clock Input

IS

IS

20

CLOCKI

14.318MHz Clock Input

IS

IS

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.

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.

11

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