Epson RX8111CE Applications Manual page 29

RX8111CE
The resolution of the count value depends on the selected clock source.
3) TE bit (Timer Enable)
The bit controls wake-up timer start / stop.
TE Data
Write
4) TF bit (Timer Flag)
This is a flag bit that retains the result when a wake-up timer interrupt event is detected.
TF Data
Write
Read
5) TIE bit (Timer Interrupt Enable)
This bit is used to control output of interrupt signals from the /INT pin when a wake-up timer interrupt event has occurred.
TIE Data
0
Write
1
6) TBKON, TBKE bit (Timer Backup ON, Timer Backup/normal Enable)
When TBKE = "1",This function selects the operation time with the main power supply or the operation time with the backup power
supply. The count value is accumulated.
Source clock select signal
TSEL0,TSEL1 bit
TSTP
1 Hz
Figure 19 Wake-up timer block diagram(timer source)
Stops wake-up interrupt timer interrupt function.
0 Clearing this bit to zero does not enable the /INT low output status to be cleared (to
Hi-Z).
Starts wake-up interrupt timer interrupt function.
1
The countdown that starts when the TE bit value changes from "0" to "1" always
begins from the preset value.
The TF bit is cleared to zero to prepare for the next status detection
0 Clearing this bit to zero is not enable the /INT low output status to be cleared (to
Hi-Z).
Invalid (writing "1" will be ignored)
1
−
0
Wake-up timer interrupt events are detected.
1
(Result is retained until this bit is cleared to zero.)
Table 20 TIE bit (Timer Interrupt Enable)
Description
1) When a wake-up timer interrupt event occurs, an interrupt signal is not generated.
2) When a wake-up timer interrupt event occurs, the interrupt signal is canceled (/INT
status changes from low to Hi-Z).
When a wake-up timer interrupt event occurs, an interrupt signal is generated (/INT
status changes from Hi-Z to low).
4096 Hz
source
clock
64 Hz
selector
1 Hz
1/60 Hz
1/60
Table 18 TE bit (Timer Enable)
Description
Table 19 TF bit (Timer Flag)
Description
Page − 25
Resister
Timer Counter 0
TSTP
Timer Counter 1
Timer Counter 2
timer stop signal
TSTP, TBKE, TBKON bit
ETM61E-01