参数资料
型号: UPD78F9510GR-JJG-A
厂商: Renesas Electronics America
文件页数: 36/175页
文件大小: 0K
描述: MCU 8BIT SGL CHIP 16PIN
标准包装: 400
系列: 78K0S/Kx1+
核心处理器: 78K0S
芯体尺寸: 8-位
速度: 10MHz
外围设备: LVD,POR,PWM,WDT
输入/输出数: 13
程序存储器容量: 1KB(1K x 8)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 16-SSOP(0.173",4.40mm 宽)
包装: 托盘
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
User’s Manual U16994EJ6V0UD
128
(17) Changing compare register during timer operation
<1>
With the 16-bit timer capture/compare register 0n0 (CR0n0) used as a compare register, when changing
CR0n0 around the timing of a match between 16-bit timer counter 00 (TM00) and 16-bit timer
capture/compare register 0n0 (CR0n0) during timer counting, the change timing may conflict with the
timing of the match, so the operation is not guaranteed in such cases. To change CR0n0 during timer
counting, INTTM000 interrupt servicing performs the following operation.
<Changing cycle (CR000)>
1. Disable the timer output inversion operation at the match between TM00 and CR000 (TOC001 = 0).
2. Disable the INTTM000 interrupt (TMMK000 = 1).
3. Rewrite CR000.
4. Wait for 1 cycle of the TM00 count clock.
5. Enable the timer output inversion operation at the match between TM00 and CR000 (TOC001 = 1).
6. Clear the interrupt request flag of INTTM000 (TMIF000 = 0).
7. Enable the INTTM000 interrupt (TMMK000 = 0).
<Changing duty (CR010)>
1. Disable the timer output inversion operation at the match between TM00 and CR010 (TOC004 = 0).
2. Disable the INTTM000 interrupt (TMMK000 = 1).
3. Rewrite CR010.
4. Wait for 1 cycle of the TM00 count clock.
5. Enable the timer output inversion operation at the match between TM00 and CR010 (TOC004 = 1).
6. Clear the interrupt request flag of INTTM000 (TMIF000 = 0).
7. Enable the INTTM000 interrupt (TMMK000 = 0).
While interrupts and timer output inversion are disabled (1 to 4 above), timer counting is continued. If
the value to be set in CR0n0 is small, the value of TM00 may exceed CR0n0. Therefore, set the value,
considering the time lapse of the timer clock and CPU after an INTTM000 interrupt has been generated.
Remark n = 0 or 1
<2>
If CR010 is changed during timer counting without performing processing <1> above, the value in
CR010 may be rewritten twice or more, causing an inversion of the output level of the TO00 pin at each
rewrite.
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