
Table 9-3: Avalon-MM Slave
Pin Name Width Direction Description
addr 9 Input
Avalon-MM Address bus
Highest addressable byte
address is 0x118 so a 9-bit
width is required
read Input Avalon-MM Read indication
readdata 32 Output Avalon-MM Read Data
Response from the slave
write Input Avalon-MM Write
indication
writedata 32 Input Avalon-MM Write Data
Table 9-4: Interrupt Interface
Pin Name Direction Description
intr Output Interrupt signal
Table 9-5: Flow Control
Pin Name Direction Description
sin Input Serial Input from external link
sout Output Serial Output to external link
sout_oe Output Output enable for Serial Output to
external link
Table 9-6: Modem Control and Status
Pin Name Direction Description
cts_n Input Clear to Send
rts_n Output Request to Send
dsr_n Input Data Set Ready
dcd_n Input Data Carrier Detect
ri_n Input Ring Indicator
dtr_n Output Data Terminal Ready
out1_n Output User Designated Output1
out2_n Output User Designated Output2
UG-01085
2014.24.07
Interface
9-3
16550 UART
Altera Corporation
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