NS9210B-0-I75 Datasheet, PDF (17/68 Pages) List of Unclassifed Manufacturers – Figure 1 shows the NS7520 modules. Dashed lines indicate shared pins

“No connect” pins
“No connect” pins
Pin
R13
P12
N12
R15
M11
P11
N11
R12
R14
P13
Description
Tie to V_CC
Tie to V_CC
XTALB1: Tie to V_CC
XTALB2: NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
General Purpose I/O
GPIO signal Serial
signal
PORTA7
TXDA
PORTA6
DTRA_
Other
signal
DREQ1_
PORTA5
PORTA4
RTSA_
RXCA/RIA_/
OUT1A_
Pin I/O OD
J14 U I/O 2
J13 U I/O 2
J15 U I/O 2
J12 U I/O 2
PORTA3
PORTA2
PORTA1
PORTA0
RXDA
DSRA_
CTSA_
TXCA/
OUT2A_/
DCDA_
DACK1_
H15 U I/O 2
AMUX
H12 U I/O 2
DONE1_ (O) H13 U I/O 2
DONE1_ (I) G12 U I/O 2
PORTC7
PORTC6
TXDB
DTRB_
DREQ2_
G13 U I/O 2
G14 U I/O 2
Serial channel Other
description
description
Channel 1 TXD
Channel 1 DTR_ DMA channel 3/5
Req
Channel 1 RTS_
Pgm’able Out/
Channel 1
RXCLK/ Channel
1 ring signal/
Channel 1 SPI
clock (CLK)
Channel 1 RXD
DMA channel 3/5
ACK
Channel 1 DSR_ DRAM addr mux
Channel 1 CTS_ DMA channel 3/5
DONE_Out
Pgm’able Out/
Channel 1 DCD/
Channel 1 SPI
enable (SEL_)/
Channel 1 TXCLK
DMA channel 3/5
DONE_In
Channel 2 TXD GEN interrupt out
Channel 2 DTR_ DMA Channel 4/6
Req
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