27-24
MC9328MX1 Reference Manual
MOTOROLA
Universal Asynchronous Receiver/Transmitters (UART) Modules
27.7.2 UART Transmitter Registers
The write-only UART Transmitter Registers are where the ARM920T processor writes the data to be
transmitted. When these registers are read, the TX_DATA bits are always read as 0. The UTXnD_1 and
UTXnD_2 registers are each mapped to 16 word-length addresses to support the STM instruction.
UTXnD_1
UTXnD_2
UART1 Transmitter Register n
UART2 Transmitter Register n
Addr
0x04*n
0x04*n
BIT
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
TYPE
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0x0000
BIT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
TX_DATA
TYPE
r
r
r
r
r
r
r
r
w
w
w
w
w
w
w
w
RESET
0
0
0
0
0
0
0
0
?
?
?
?
?
?
?
?
0x0000
Note:
n
=
(0 through 15)
Table 27-13. UART1 Transmitter Register n and UART2 Transmitter Register n Description
Name
Description
Settings
Reserved
Bits 31–8
Reserved—These bits are reserved and should read 0.
TX_DATA
Bits 7–0
Transmit Data
—Holds the parallel transmit data inputs. In 7-bit mode, D7 is ignored. In 8-bit
mode, all bits are used. Data is transmitted least significant bit (LSB) first. A new character is
transmitted when the TX_DATA field is written. The TX_DATA field must be written only when the
TRDY bit is high to ensure that corrupted data is not sent.
Summary of Contents for DragonBall MC9328MX1
Page 68: ...1 12 MC9328MX1 Reference Manual MOTOROLA Introduction ...
Page 86: ...2 18 MC9328MX1 Reference Manual MOTOROLA Signal Descriptions and Pin Assignments ...
Page 116: ...3 30 MC9328MX1 Reference Manual MOTOROLA Memory Map ...
Page 126: ...4 10 MC9328MX1 Reference Manual MOTOROLA ARM920T Processor ...
Page 160: ...8 8 MC9328MX1 Reference Manual MOTOROLA System Control ...
Page 272: ...13 32 MC9328MX1 Reference Manual MOTOROLA DMA Controller ...
Page 281: ...Programming Model MOTOROLA Watchdog Timer Module 14 9 ...
Page 282: ...14 10 MC9328MX1 Reference Manual MOTOROLA Watchdog Timer Module ...
Page 300: ...15 18 MC9328MX1 Reference Manual MOTOROLA Analog Signal Processor ASP ...
Page 438: ...18 16 MC9328MX1 Reference Manual MOTOROLA Serial Peripheral Interface Modules SPI 1 and SPI 2 ...
Page 478: ...19 40 MC9328MX1 Reference Manual MOTOROLA LCD Controller ...
Page 574: ...21 32 MC9328MX1 Reference Manual MOTOROLA Memory Stick Host Controller MSHC Module ...
Page 598: ...23 16 MC9328MX1 Reference Manual MOTOROLA Real Time Clock RTC ...
Page 670: ...24 72 MC9328MX1 Reference Manual MOTOROLA SDRAM Memory Controller ...
Page 726: ...25 56 MC9328MX1 Reference Manual MOTOROLA SmartCard Interface Module SIM ...
Page 736: ...26 10 MC9328MX1 Reference Manual MOTOROLA General Purpose Timers ...
Page 854: ...29 18 MC9328MX1 Reference Manual MOTOROLA I2C Module ...
Page 900: ...30 46 MC9328MX1 Reference Manual MOTOROLA Synchronous Serial Interface SSI ...
Page 942: ...32 26 MC9328MX1 Reference Manual MOTOROLA GPIO Module and I O Multiplexer IOMUX ...