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μ
PD720231
6. General Purpose I/O
6.1 Features
μ
The
PD720231 supports 10 configurable GPIO pins with the following features. Each function is configured
as shown in Table 6-1.
SPI interface for external serial flash ROM.
Disk Activity LED
Reset/Clock output for external device
External trigger input
Pin Name
GPIO0/SPISO
GPIO1/SPISCK
GPIO2/SPISI
GPIO3/SPICSB
GPIO4
GPIO5
GPIO6/ACT
GPIO7/CLKOUT
GPIO8
GPIO9/EXTINT
6.2
SPI interface
μ
The
PD720231 supports SPI interface and it is required to connect to the external serial Flash ROM to
store parameter or firmware patch.
6.3
Disk Activity LED
μ
The
PD720231 provides LED support to indicate the access to SATA device. GPIO6 is used for this
function. In ATAPI device attached to
R19UH0094EJ0100 Rev 1.00
Mar 1, 2013
Table 6-1 Function configuration
General purpose I/O or SPI master input / slave output
General purpose I/O or SPI clock
General purpose I/O or SPI master output / slave input
General purpose I/O or SPI chip select for the external serial
flash ROM.
General purpose I/O
General purpose I/O
General purpose I/O or Disk Activity LED
General purpose I/O or 30MHz clock output
General purpose I/O
General purpose I/O or external interrupt such as push button
input
μ
PD720231, this function is not available.
6. General Purpose I/O
Function
Page 22 of 30
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