
UART Modules
31-12
Freescale Semiconductor
31.3.7
UART Transmit Buffers (UTBn)
The transmit buffers consist of the transmitter holding register and the transmitter shift register. The
holding register accepts characters from the bus master if UART’s USR
n
[TXRDY] is set. A write to the
transmit buffer clears USR
n
[TXRDY], inhibiting any more characters until the shift register can accept
more data. When the shift register is empty, it checks if the holding register has a valid character to be sent
(TXRDY = 0). If there is a valid character, the shift register loads it and sets USR
n
[TXRDY] again. Writes
to the transmit buffer when the UART’s TXRDY is cleared and the transmitter is disabled have no effect
on the transmit buffer.
shows UTB
n
. TB contains the character in the transmit buffer.
31.3.8
UART Input Port Change Registers (UIPCRn)
The UIPCRs hold the current state and the change-of-state for U
n
CTS.
Address: 0xFC06_000C (URB0)
0xFC06_400C (URB1)
0xFC06_800C (URB2)
Access: User read-only
7
6
5
4
3
2
1
0
R
RB
W
Reset:
1
1
1
1
1
1
1
1
Figure 31-8. UART Receive Buffer (URBn)
Address: 0xFC06_000C (UTB0)
0xFC06_400C (UTB1)
0xFC06_800C (UTB2)
Access: User write-only
7
6
5
4
3
2
1
0
R
W
TB
Reset:
0
0
0
0
0
0
0
0
Figure 31-9. UART Transmit Buffer (UTBn)
Address: 0xFC06_0010 (UIPCR0)
0xFC06_4010 (UIPCR1)
0xFC06_8010 (UIPCR2)
Access: User read-only
7
6
5
4
3
2
1
0
R
0
0
0
COS
1
1
1
CTS
W
Reset:
0
0
0
0
1
1
1
UnCTS
Figure 31-10. UART Input Port Changed Registers (UIPCRn)
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...