EPAQ-9410
Hardware Programming Reference 0.16
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Copyright © 2019 QEI
Page 27
The table below lists modes that are intended to be supported for production.
Mode
Value
power-up/reset: both RS232 and RS485 transmitters are disabled,
RS485 Mode (MOD_SEL = 0)
0x00
RS232 only, RS485 transmitter is disabled
0x01
RS232 with IRIB-B_RS-485 signal transmitted over RS485
0x07
RS232 transmitter is disabled, RS485 connected QUAD UART 1
CHn,_RS-485_DRV_EN = CHn_RTS#
0x08
3.11.1 CH_RXD Status Register
Register Name: CH_RXD_STS
Addresses: 0xB408_0020
Access type: read-only
Reading the CH_RXD register returns the momentary state of the CPLD pins as
described in the table below
7
6
5
4
3
2
1
0
0
CH7_RXD
UART3_RXD
UART2_RXD
CH4_RXD
CH3_RXD
CH2_RXD
CH1_RXD
3.11.2 CH_RXD2 Status Register
Register Name: CH_RXD2_STS
Addresses: 0xB408_0021
Access type: read-only
Reading the CH_RXD2 register returns the momentary state of the CPLD pins as
described in the table below
7
6
5
4
3
2
1
0
COM_EXP_RXD
CH15_RXD
CH14_RXD
IRIG_FIBER_RX
IRIG_B_RS485_RXD
CH11_RXD
CH10_RXD
CH9_RXD
3.11.3 CH_TXD Status Register
Register Name: CH_TXD_STS
Addresses: 0xB408_0022
Access type: read-only
Reading the CH_TXD register returns the momentary state of the CPLD pins as
described in the table below
7
6
5
4
3
2
1
0
0
CH7_TXD
UART3_TXD
UART2_TXD
CH4_TXD
CH3_TXD
CH2_TXD
CH1_TXD
3.11.4 CH_TXD2 Status Register
Register Name: CH_TXD2_STS
Addresses: 0xB408_0023
