Digi NS9750 User Manual
Page 680
S e r i a l p o r t c o n t r o l a n d s t a t u s r e g i s t e r s
6 5 6
N S 9 7 5 0 H a r d w a r e R e f e r e n c e
D21:20
R/W
MODE
00
Serial channel mode
00
UART mode
01
Reserved
10
SPI master mode
11
SPI slave mode
Configures the serial channel to operate in UART or SPI
modes. The MODE field must be set before the CE bit in
Serial Channel B/A/C/D Control Register A is set to 1.
D19
R/W
BITORDR
0
Bit ordering
0
Bits are processed LSB first, MSB last
1
Bits are processed MSB first, LSB last
Controls the order in which bits are transmitted and
received in the Serial Shift register.
D18:12
R/W
Not used
0
Always write to 0.
D11:06
N/A
Reserved
N/A
N/A
D05
R/W
Not used
0
Must be written as 0.
D04:00
N/A
Reserved
N/A
N/A
Bits
Access
Mnemonic
Reset
Description
Table 385: Serial Channel B/A/C/D Control Register B