参数资料
型号: S1C63158B0A010R
元件分类: 微控制器/微处理器
英文描述: 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, PBGA
文件页数: 119/159页
文件大小: 1200K
代理商: S1C63158B0A010R
54
EPSON
S1C63808 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Stopwatch Timer)
4.8.6 Interrupt function
10 Hz and 1 Hz interrupts
The 10 Hz and 1 Hz interrupts can be generated through the overflow of stopwatch timers SWD4–7
and SWD8–11 respectively. Also, software can set whether to separately mask the frequencies de-
scribed earlier.
Figure 4.8.6.1 is the timing chart for the counters.
10 Hz interrupt request
1 Hz interrupt request
FF7FH
(1/10 sec BCD)
FF7EH
(1/100 sec BCD)
D0
D1
D2
D3
D0
D1
D2
D3
Address
Register
Stopwatch timer (SWD0–3) timing chart
FF7DH
(1/1,000 sec BCD)
D0
D1
D2
D3
Address
Register
Stopwatch timer (SWD4–7) timing chart
Address
Register
Stopwatch timer (SWD8–11) timing chart
Fig. 4.8.6.1 Timing chart for counters
As shown in Figure 4.8.6.1, the interrupts are generated by the overflow of their respective counters ("9"
changing to "0"). Also, at this time the corresponding interrupt factor flag (ISW10, ISW1) is set to "1".
The respective interrupts can be masked separately through the interrupt mask registers (EISW10,
EISW1). However, regardless of the setting of the interrupt mask registers, the interrupt factor flags
are set to "1" by the overflow of their corresponding counters.
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