Renesas mPD720231, Руководство пользователя

Страница: 31 / 43

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