Owner manual

4
AT75C320
1769A–07/01
USART A
RXDA I Receive Serial Data
TXDA O Transmit Serial Data
NRTSA O Request to Send
NCTSA I Clear To Send
NDTRA O Data Terminal Ready
NDSRA I Data Set Ready
NDCDA I Data Carrier Detect
NRIA I Ring Indicator
SCKA I/O Serial Clock
USART B
RXDB I Receive Serial Data
TXDB O Transmit Serial Data
JTAG Interface
NTRST I TAP Reset
TCK I TAP Clock
TMS I JTAG Test Mode Select
TDI I JTAG Test Data Input
TDO O JTAG Test Data Output
Codec Interface A
SCLKA I/O Codec Serial Clock
FAS I/O Frame Pulse
STXA O Transmit Data to Codec
SRXA I Receive Data from Codec
Codec Interface B
SCLKB I/O Codec Serial Clock
FSB I/O Frame Pulse
STXB O Transmit Data to Codec
SRXB I Receive Data from Codec
Miscellaneous
RESET I Master Reset
FIQ/LOWP I Fast Interrupt/Low Power
IRQ0 I External Interrupt request
XREF I External 96 MHz PLL Reference
XTALIN I External Crystal Input
XTALOUT O External Crystal Output
TST I Test Mode
DBW32 I External Data Width for CS0
BO206 I Package Size Option
Table 2. AT75C320 Pin Description (Continued)
Block PQFP Pin Name Type Function