tmp88fw45afg TOSHIBA Semiconductor CORPORATION, tmp88fw45afg Datasheet - Page 202

• Manufacturer Part Number: tmp88fw45afg
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

15.9
Status Flag
15.9.6
TDBUF
TXD pin
UARTSR<TBEP>
INTTXD interrupt
Shift register
Figure 15-10 Generation of Transmit End Flag and Transmit Data Buffer Empty
Shift register
TXD pin
UARTSR<TBEP>
UARTSR<TEND>
INTTXD interrupt
UARTSR<TEND> is set to “1”. The UARTSR<TEND> is cleared to “0” when the data transmit is stated after
writing the TDBUF.
When data are transmitted and no data is in TDBUF (UARTSR<TBEP> = “1”), transmit end flag
Transmit End Flag
***** 1
Figure 15-9 Generation of Transmit Data Buffer Empty
xxxx
***
1xx
1xxxx0
Start
****
Data write
* 1xxxx
1x
Bit 0
yyyy
***** 1
Stop
Page 188
Data write for TDBUF
Final bit
**** 1x
***** 1
Stop
After reading UARTSR writing TDBUF
clears TBEP.
1yyyy0
1yyyy0
Start
TMP88FW45AFG
zzzz
Data write
* 1yyyy
Bit 0