參數(shù)資料
型號： EB402
英文描述： EB402 Evaluation Board user＇s guide 7/01
中文描述： EB402評估板用戶指南7月1日
文件頁數(shù)： 24/84頁
文件大小： 1014K
代理商： EB402
3-8
Hardware Overview
PIO signal use is shown in Table 3.3.
3.2.1 Controlling the Codecs
You must reset the serial port audio codec daughterboards
(BD-EBM-CODEC-1), select their operating mode, and enable them
before using them. Use PIO[3:0] to reset and enable the codecs. One
codec is included with the EB402 package. It is congured and installed
on SPORT0.
Table 3.3
PIO Signal Use
PIO Signal
BOOT ROM Use
EB402 Use
External Use
PIO0
Output goes LOW for a
short interval to signal
completion of self-test.
Enables codec on
SPORT0. Jumper JP11
selects pull-up/pull-down
termination.
Available for SPORT0
daughterboard control.
PIO1
For HPI mode select. Input
HIGH selects Motorola
mode; input LOW selects
Intel mode.
Resets codec on SPORT0.
Jumper JP10 selects
pull-up/pull-down
termination.
Available for SPORT0
daughterboard control.
PIO2
Not used.
Enables codec on
SPORT1. Jumper JP9
selects pull-up/pull-down
termination.
Available for SPORT1
daughterboard control.
PIO3
Not used.
Resets codec on SPORT1.
Jumper JP8 selects pull-
up/pull-down termination.
Available for SPORT1
daughterboard control.
PIO4
Not used.
Pull-up/pull-down jumper,
JP7, selectable to support
boot modes.
Available as a general
purpose output pin at the
EEI Control Connector.
PIO5
Not used.
Pull-up/pull-down jumper,
JP6, selectable to support
boot modes.
Available as a general
purpose output pin at the
EEI Control Connector.
PIO6
Not used.
Pull-up/pull-down jumper,
JP5, selectable to support
boot modes.
Available as a general
purpose output pin at the
EEI Control Connector.
PIO7
Not used.
Not available.
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