Harman Kardon AVR140 Service Manual page 109

AVR140
HDATA7, GPIO7 — DSPC Bidirectional Data Bus, General Purpose I/O
HDATA6, GPIO6
HDATA5, GPIO5
HDATA4, GPIO4
HDATA3, GPIO3
HDATA2, GPIO2
HDATA1, GPIO1
HDATA0, GPIO0
In parallel host mode, these pins provide a bidirectional data bus. These pins can also act as
general purpose input or output pins that can be individually configured and controlled by
DSPC. These pins have an internal pull-up. BIDIRECTIONAL - Default: INPUT
—
A0, GPIO13 Host Parallel Address Bit 0, General Purpose I/O
In parallel host mode, this pin serves as the LS Bit of a two bit address input used to select
one of four parallel registers. This pin can act as a general-purpose input or output that can be
individually configured and controlled by DSPC. BIDIRECTIONAL - Default: INPUT
A1, GPIO12 — Host Address Bit 1, General Purpose I/O
In parallel host mode, this pin serves as the MS Bit of a two bit address input used to select
one of four parallel registers. This pin can act as a general-purpose input or output that can be
individually configured and controlled by DSPC. BIDIRECTIONAL - Default: INPUT
RD, R/W, GPIO11 — Host Parallel Output Enable, Host Parallel R/W, General Purpose I/O
In Intel parallel host mode, this pin serves as the active-low data bus enable input. In Motorola
parallel host mode, this pin serves as the read-high/write-low control input signal. This pin can
act as a general-purpose input or output that can be individually configured and controlled by
DSPC. This pin has an internal pull-up. BIDIRECTIONAL - Default: INPUT
—
WR, DS, GPIO10
In Intel parallel host mode, this pin serves as the active-low data bus enable input. In Motorola
parallel host mode, this pin serves as the read-high/write-low control input signal. In serial host
mode, this pin can serve as a general purpose input or output bit. This pin can act as a
general-purpose input or output that can be individually configured and controlled by DSPC.
This pin has an internal pull-up.
BIDIRECTIONAL - Default: INPUT
CS, GPIO9 — Host Parallel Chip Select, General Purpose I/O
In parallel host mode, this pin serves as the active-low chip-select input signal. This pin can
act as a general-purpose input or output that can be individually configured and controlled by
DSPC. This pin has an internal pull-up. BIDIRECTIONAL - Default: INPUT
Host Write Strobe, Host Data Strobe, General Purpose I/O
109
harman/kardon