27-50
MC9328MX1 Reference Manual
MOTOROLA
Universal Asynchronous Receiver/Transmitters (UART) Modules
27.7.17 UART Test Register 1
The UART Test Register 1 controls the various test features of the UART module.
UTS_1
UTS_2
UART1 Test Register 1
UART2 Test Register 1
Addr
0x002060D0
0x002070D0
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
FRCP
ERR
LOOP
TX
EMPTY
RX
EMPTY
TX
FULL
RX
FULL
SOFT
RST
TYPE
r
r
rw
rw
r
rw
r
r
r
r
r
r
r
r
r
r
RESET
0
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0x0060
Table 27-29. UART1 Test Register 1 and UART2 Test Register 1 Description
Name
Description
Settings
Reserved
Bits 31–14
Reserved—These bits are reserved and should read 0.
FRCPERR
Bit 13
Force Parity Error
—Forces the transmitter to generate a parity
error if parity is enabled. FRCPERR is provided for system
debugging.
0 =
Generate normal parity
1 =
Generate inverted parity
(error)
LOOP
Bit 12
Loop TX and RX for Test
—Controls loopback for test purposes.
When LOOP is high, the receiver input is internally connected to the
transmitter and ignores the RXD pin. The transmitter is unaffected
by LOOP.
0 =
Normal receiver operation
1 =
Internally connect the
transmitter output to the
receiver inpu
t
Reserved
Bits 11–7
Reserved—These bits are reserved and should read 0.
TXEMPTY
Bit 6
TxFIFO Empty
—Indicates that the TxFIFO is empty.
0 = The TxFIFO is not empty
1 = The
TxFIFO is empty
RXEMPTY
Bit 5
RxFIFO Empty
—Indicates the RxFIFO is empty.
0 = The RxFIFO is not empty
1 = The
RxFIFO is empty
TXFULL
Bit 4
TxFIFO FULL
—Indicates the TxFIFO is full.
0 = The TxFIFO is not full
1 = The
TxFIFO is full
RXFULL
Bit 3
RxFIFO FULL
—Indicates the RxFIFO is full.
0 = The RxFIFO is not full
1 = The
RxFIFO is full
Reserved
Bits 2–1
Reserved—These bits are reserved and should read 0.
Summary of Contents for DragonBall MC9328MX1
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Page 86: ...2 18 MC9328MX1 Reference Manual MOTOROLA Signal Descriptions and Pin Assignments ...
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