www.national.com 168
CP3BT26
22.3 UART REGISTERSSoftware interacts with the UART modules by accessing the
UART registers, as listed in Table 70.
Table 70 UART Registers
Name Address Description
U0RBUF FF F202h UART0 Receive Data
Buffer
U0TBUF FF F200h UART0 Transmit Data
Buffer
U0PSR FF F20Eh UART0 Baud Rate
Prescaler
U0BAUD FF F20Ch UART0 Baud Rate
Divisor
U0FRS FF F208h UART0 Frame Select
Register
U0MDSL1 FF F20Ah UART0 Mode Select
Register 1
U0STAT FF F206h UART0 Status
Register
U0ICTRL FF F204h UART0 Interrupt Con-
trol Register
U0OVR FF F210h UART0 Oversample
Rate Register
U0MDSL2 FF F212h UART0 Mode Select
Register 2
U0SPOS FF F214h UART0 Sampl e
Position Register
U1RBUF FF F222h UART1 Receive Data
Buffer
U1TBUF FF F220h UART1 Transmit Data
Buffer
U1PSR FF F22Eh UART1 Baud Rate
Prescaler
U1BAUD FF F22Ch UART1 Baud Rate
Divisor
U1FRS FF F228h UART1 Frame Select
Register
U1MDSL1 FF F22Ah UART1 Mode Select
Register 1
U1STAT FF F226h UART1 Status
Register
U1ICTRL FF F224h UART1 Interrupt Con-
trol Register
U1OVR FF F230h UART1 Oversample
Rate Register
U1MDSL2 FF F232h UART1 Mode Select
Register 2
U1SPOS FF F234h UART1 Sam ple
Position Register
U2RBUF FF F242h UART2 Receive Data
Buffer
U2TBUF FF F240h UART2 Transmit Data
Buffer
U2PSR FF F24Eh UART2 Baud Rate
Prescaler
U2BAUD FF F24 Ch UART2 Baud Rate
Divisor
U2FRS FF F248h UART2 Frame Select
Register
U2MDSL1 FF F24Ah UART2 Mode Select
Register 1
U2STAT FF F246h UART2 Status
Register
U2ICTRL FF F244h UART2 Interrupt Con-
trol Register
U2OVR FF F250h UART2 Oversample
Rate Register
U2MDSL2 FF F252h UART2 Mode Select
Register 2
U2SPOS FF F254h UART2 Sam ple
Position Register
U3RBUF FF F262h UART3 Receive Data
Buffer
U3TBUF FF F260h UART3 Transmit Data
Buffer
U3PSR FF F26Eh UART3 Baud Rate
Prescaler
U3BAUD FF F26 Ch UART3 Baud Rate
Divisor
U3FRS FF F268h UART3 Frame Select
Register
U3MDSL1 FF F26Ah UART3 Mode Select
Register 1
U3STAT FF F266h UART3 Status
Register
U3ICTRL FF F264h UART3 Interrupt Con-
trol Register
Table 70 UART Registers
Name Address Description