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3.1.9
AC-link Interface Signals
Signal Name
Type
ACRESET*
Output
AC '97 Master H/W Reset
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
SYNC
Output
48 kHz Fixed Rate Sample Sync
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
SDOUT
Output
Serial, Time Division Multiplexed, AC '97 Output Stream
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
SDIN]1]
Input
Serial, Time Division Multiplexed, AC '97 Input Stream
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
SDIN[0]
Input
Serial, Time Division Multiplexed, AC '97 Input Stream
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
BITCLK
Input
12.288 MHz Serial Data Clock
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
3.1.10
Interrupt Signals
Signal Name
Type
NMI*
Input
Non-Maskable Interrupt
PU
Non-maskable interrupt signal.
INT[7:0]
Input
External Interrupt Requests
PU
External interrupt request signals.
The pins are shared with other functions (refer to Section "3.3 Pin Multiplexing").
3.1.11
CHI Interface Signals
Signal Name
Type
CHIFS
Input/output
CHI Frame synchronization
PU
CHI frame synchronization signal. This pin can be used in either output or input mode.
In output mode, the pin allows the TX4925 to become the master CHI synchronization
source. In input mode, the pin allows the external peripheral device to become the
master CHI synchronization source. In that case, the TX4925 CHI module becomes a
slave for external synchronization.
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
CHICLK
Input/output
CHI Clock
PU
CHI clock signal. This pin can be used in either output or input mode. In output mode,
the pin allows the TX4925 to become the master CHI clock source. In input mode, the
pin allows the external peripheral device to become the master CHI clock source. In
that case, the TX4925 CHI module becomes a slave for the external clock.
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
CHIDOUT
Output
CHI Data Output
PU
CHI serial data output signal.
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
CHIDIN
Input
CHI Data Input
PU
CHI serial data input signal.
The pin is shared with other functions (refer to Section "3.3 Pin Multiplexing").
Table 3.1.9 AC-link Interface Signals
Description
Table 3.1.10 Interrupt Signals
Description
Table 3.1.11 CHI Interface Signals
Description
3-8
Chapter 3 Signals
Initial State
PIO input
PIO input
PIO input
PIO input
PIO input
PIO input
Initial State
Input
PIO input
Initial State
PIO input
PIO input
PIO input
PIO input
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