Rainbow Electronics W90N740 - Manual (Page 159)

W90N740
Publication Release Date: November 26, 2004
- 155 - Revision A4
7.9.1 UART Control Registers Map
R: read only, W: write only, R/W: both read and write, C: Only value 0 can be written
REGISTER ADDRESS R/W DESCRIPTION RESET VALUE
RBR 0xFFF8.0000 R Receive Buffer Register (DLAB = 0) Undefined
THR 0xFFF8.0000 W Transmit Holding Register (DLAB = 0) Undefined
IER 0xFFF8.0004 R/W Interrupt Enable Register (DLAB = 0) 0x0000.0000
DLL 0xFFF8.0000 R/W
Divisor Latch Register (LS)
(DLAB = 1)
0x0000.0000
DLM 0xFFF8.0004 R/W
Divisor Latch Register (MS)
(DLAB = 1)
0x0000.0000
IIR 0xFFF8.0008 R Interrupt Identification Register 0x8181.8181
FCR 0xFFF8.0008 W FIFO Control Register Undefined
LCR 0xFFF8.000C R/W Line Control Register 0x0000.0000
MCR 0xFFF8.0010 R/W Modem Control Register 0x0000.0000
LSR 0xFFF8.0014 R Line Status Register 0x6060.6060
MSR 0xFFF8.0018 R MODEM Status Register 0x0000.0000
TOR 0xFFF8.001C R/W Time Out Register 0x0000.0000
Receive Buffer Register (RBR)
Register Address R/W Description Reset Value
RBR 0xFFF8.0000 R Receive Buffer Register (DLAB = 0) Undefined
7 6 5 4 3 2 1 0
8-bit Received Data
8-bit Received Data [7:0]
By reading this register, the UART will return an 8-bit data received from SIN pin (LSB first).