EMAC SoM-A5D36, Руководство пользователя

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SoM-A5D36 User Manual
Revision 1.30 © 2015 - 14 -
2.4.8 Serial Ports
The SoM-200 pin specification has the provision for 4 serial ports. However, the ATSAMA5D36 provides 6
serial ports. The additional serial ports are accommodated through the use of alternate SoM pins. COMB
(Debug port) is normally the console port. The ATSAMA5D36 processor does not provide full modem
handshaking for COMA as called for in the SoM-200 pin specification, therefore EMAC has utilized
processor GPIO lines for this function. The RTS lines for each port can be used to achieve automatic RS485
direction control.
Table 12: Serial Ports
SODIMM
Pin#
SoM
Pin Name
Processor
Pin Name(s)
Port Line SoM Description
95 COMA_TXD TXD1
PB29 COMA transmit/GPIO
96 COMA_RXD RXD1
PB28 COMA receive/GPIO
97 COMA_CTS CTS1
PB26 COMA CTS/GPIO
98 COMA_RTS RTS1
PB27 COMA RTS/GPIO
99 COMA_DTR PC0/TIOA3
PC0 COMA DTR/GPIO
100 COMA_DSR PC1/TIOB3
PC1 COMA DSR /GPIO
101 COMA_RI PC2/TCLK3
PC2 COMA RING/GPIO
102 COMB_TXD DTXD
PB31 COMB transmit/GPIO
103 COMB_RXD DRSD
PB30 COMB receive/GPIO
104 COMB_CTS PC3/TIOA4
PC3 COMB CTS/GPIO
105 COMB_RTS PC4/TIOB4
PC4 COMB RTS/GPIO
106 COMC_TXD TXD2
PE26 COMC transmit/GPIO
107 COMC_RXD RXD2
PE25 COMC receive/GPIO
108 COMC_CTS CTS2
PE23 COMC CTS/GPIO
109 COMC_RTS RTS2
PE24 COMC RTS/GPIO
110 COMD_TXD TXD0
PD18 COMD transmit/GPIO
111 COMD_RXD RXD0
PD17 COMD receive/GPIO
112 COMD_CTS CTS0/URXD0
PC29 COMD CTS/GPIO
113 COMD_RTS RTS0/UTXD0
PC30 COMD RTS/GPIO