Digi NS7520B-1-C36 Hardware Reference Manual page 34

P i n o u t d e t a i l t a b l e s a n d s i g n a l d e s c r i p t i o n s
GPIO
signal
PORTA4
PORTA3
PORTA2
PORTA1
PORTA0
PORTC7
PORTC6
PORTC5
PORTC4
2
PORTC3
2
PORTC2
Table 9: GPIO pinout
2 2
Serial Other
signal signal
RXCA/RIA_/
OUT1A_
RXDA DACK1_
DSRA_ AMUX
CTSA_ DONE1_
(O)
TXCA/ DONE1_ (I) G12 U
OUT2A_/
DCDA_
TXDB
DTRB_ DREQ2_
RTSB_ REJECT_
RXCB/RIB_/ RESET_
OUT1B_
RXDB LIRQ3/
DACK2_
DSRB_ LIRQ2/
RSPF_
N S 7 5 2 0 H a r d w a r e R e f e r e n c e , R e v G 9 / 2 0 0 7
Serial channel
Pin I/O OD description
J12 U I/O 2 Pgm'able Out/
Channel 1
RXCLK/Channel
1 ring signal/
Channel 1 SPI
clock (CLK)
H15 U I/O 2 Channel 1 RXD
H12 U I/O 2 Channel 1 DSR_
H13 U I/O 2 Channel 1 CTS_
I/O 2 Pgm'able Out/
Channel 1 DCD/
Channel 1 SPI
enable (SEL_)/
Channel 1
TXCLK
G13 U I/O 2 Channel 2 TXD
G14 U I/O 2 Channel 2 DTR_
F15 U I/O 2 Channel 2 RTS_
F12 U I/O 2 Pgm'able Out/
Channel 2
RXCLK/Channel
2 ring signal/
Channel 2 SPI
clock (CLK)
F13 U I/O 2 Channel 2 RXD
E15 U I/O 2 Channel 2 DSR_
Other
description
DMA channel 3/5
ACK
DRAM addr mux
DMA channel 3/5
DONE_Out
DMA channel 3/5
DONE_In
GEN interrupt out
DMA channel 4/6
Req
CAM reject
RESET output
See Note 1
following this
table.
Level sensitive
IRQ/DMA
channel 4/6 ACK
Level sensitive
IRQ/CAM
request