Pin Multiplexing - Samsung S3C6400X User Manual

S3C6400X RISC MICROPROCESSOR

PIN MULTIPLEXING

In AP (S3C6400X), the Keypad interface input output ports are multiplexed with GPIO K and L ports. The input
and output port counts are controlled bit-by-bit up to 8 inputs and 8 outputs.
WAKEUP SOURCE
When the Key input is used for wakeup source from STOP or SLEEP mode, KEYPAD I/F register setting is not
required. GPIO register setting (GPKCON) for KEYPAD I/F and SYSCON register (PWR_CFG) for masking are
required for wakeup.
GPIO port
GPIOK[8]
GPIOK[9]
GPIOK[10]
GPIOK[11]
GPIOK[12]
GPIOK[13]
GPIOK[14]
GPIOK[15]
GPIOL[0]
GPIOL[1]
GPIOL[2]
GPIOL[3]
GPIOL[4]
GPIOL[5]
GPIOL[6]
GPIOL[7]
Table 40-1 Keypad interface pin multiplexing
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Keypad interface port
ROW_IN[0]
ROW_IN[1]
ROW_IN[2]
ROW_IN[3]
ROW_IN[4]
ROW_IN[5]
ROW_IN[6]
ROW_IN[7]
COL_OUT [0]
COL_OUT [1]
COL_OUT [2]
COL_OUT [3]
COL_OUT [4]
COL_OUT [5]
COL_OUT [6]
COL_OUT [7]
KEYPAD INTERFACE
I/O
I
I
I
I
I
I
I
I
O
O
O
O
O
O
O
O
40-3