p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 398

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 15 Serial Communication Interface (SCI)
TE and TIE to 1 after mode cancellation generates a TXI interrupt request to start transmission
using the DTC.
Rev. 1.00 Sep. 21, 2006 Page 360 of 658
REJ09B0310-0100
Figure 15.22 Sample Flowchart for Mode Transition during Transmission
Make transition to software standby mode etc.
Cancel software standby mode etc.
Change operating mode?
Read TEND flag in SSR
All data transmitted?
Start transmission
Transmission
Initialization
TEND = 1
Yes
Yes
Yes
TE = 0
[2]
No
No
No
TE = 1
[1]
[3]
[1] Data being transmitted is lost
[2] Also clear TIE and TEIE to 0
[3] Module stop, watch, sub-active,
halfway. Data can be normally
transmitted from the CPU by
setting TE to 1, reading SSR,
writing to TDR, and clearing
TDRE to 0 after mode
cancellation; however, if the DTC
has been initiated, the data
remaining in DTC RAM will be
transmitted when TE and TIE are
set to 0.
when they are 1.
and sub-sleep modes are
included.