Uart Module Memory Map; Register Descriptions - Motorola ColdFire MCF5281 User Manual

23.3 Register Descriptions

This section contains a detailed description of each register and its specific function.
Flowcharts in Section 23.5.6, "Programming," describe basic UART module
programming. The operation of the UART module is controlled by writing control bytes
into the appropriate registers. Table 23-1 is a memory map for UART module registers.
IPSBAR Offset
UART0 UART1 UART2
0x200 0x240 0x280
0x204 0x244 0x284
0x208 0x248 0x288
0x20C 0x24C 0x28C
0x210 0x250 0x290
0x214 0x254 0x294
0x218 0x258 0x298
0x21C 0x25C 0x29C
0x234 0x274 0x2B4
0x238 0x278 0x2B8
MOTOROLA
Table 23-1. UART Module Memory Map
[31:24]
1
UART mode registers —(UMR1n) [p. 23-4],
(UMR2n) [p. 23-6]
(Read) UART status registers—(USRn) [p. 23-7]
(Write) UART clock select register
[p. 23-8]
2
(Read) Do not access
(Write) UART command registers—(UCRn)
[p. 23-9]
(UART/Read) UART receive buffers—(URBn)
[p. 23-11]
(UART/Write) UART transmit buffers—(UTBn)
[p. 23-11]
(Read) UART input port change
registers—(UIPCRn) [p. 23-12]
(Write) UART auxiliary control
1
registers —(UACRn) [p. 23-13]
(Read) UART interrupt status registers—(UISRn)
[p. 23-13]
(Write) UART interrupt mask
registers—(UIMRn) [p. 23-13]
2
(Read) Do not access
UART divider upper registers—(UBG1n)
[p. 23-14]
2
(Read) Do not access
UART divider lower registers—(UBG2n)
[p. 23-14]
(Read) UART input port registers—(UIPn)
[p. 23-15]
2
(Write) Do not access
2
(Read) Do not access
(Write) UART output port bit set command
3
registers—(UOP1n ) [p. 23-15]
Chapter 23. UART Modules
[23:16]
1
—(UCSRn)
Register Descriptions
[15:8] [7:0]
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23-3