Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
8. Operation of I2C
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
329
Note:
When external trigger enable bit (SAGSR:TRGE) is "1" and serial timer enable bit (SAGSR: TMRE) is "0",
the serial timer will not be started operating even if the external trigger set in the trigger selection bit
(SAGSR:TRG1, 0) is detected.
Stopping Serial timer
When serial timer enable bit (SACSR:TMRE) is set to "0", the serial timer will be stopped. In this case, the
values set in the serial timer register (STMR) will be retained.
Timer Operation
When serial timer register (STMR) matched serial timer comparison register (STMCR), timer interrupt flag
(SACSR:TINT) will be set to "1" and serial timer register (STMR) will be reset to "0".
Figure 8-7 Timer Operation (STMCR="10")
10
0
1
2
・・・
9
10
1
0
STMR
STMCR
TINT
Timer activation
2
・・・
9
10
1
0
Writing “0”
to TINT
to TINT
MB91520 Series
MN705-00010-1v0-E
1642