tmp88ph40mg TOSHIBA Semiconductor CORPORATION, tmp88ph40mg Datasheet - Page 119

• Manufacturer Part Number: tmp88ph40mg
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

TDBUF
TXD pin
UARTSR<TBEP>
INTTXD interrupt
Shift register
12.9.6 Transmit End Flag
TXD pin
UARTSR<TBEP>
UARTSR<TEND>
INTTXD interrupt
Shift register
Figure 12-10 Generation of Transmit End Flag and Transmit Data Buffer Empty
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
***** 1
xxxx
Figure 12-9 Generation of Transmit Data Buffer Empty
***
1xx
1xxxx0
Start
****
Data write
* 1xxxx
1x
Bit 0
yyyy
***** 1
Stop
Page 109
Data write for TDBUF
Final bit
**** 1x
***** 1
Stop
After reading UARTSR writing TDBUF
clears TBEP.
1yyyy0
1yyyy0
Start
zzzz
TMP88PH40MG
Data write
* 1yyyy
Bit 0