參數(shù)資料
型號: UPD17149GTA1
廠商: NEC Corp.
英文描述: SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 小,通用4位單晶片微控制器
文件頁數(shù): 35/102頁
文件大?。?/td> 408K
代理商: UPD17149GTA1
35
μ
PD17145(A1), 17147(A1), 17149(A1)
12. 8-BIT TIMERS/COUNTERS (TM0, TM1)
The
μ
PD17149(A1) is provided with two 8-bit timers/counters: timer 0 (TM0) and timer 1 (TM1).
By using the count-up signal of timer 0 as the count pulse to timer 1, the two 8-bit timers can be used as a
16-bit timer.
Each timer is controlled through hardware manipulation by using the PUT or GET instruction or manipulation
of the registers on the register file by using the PEEK or POKE instruction.
12.1 Configuration of 8-Bit Timers/Counters
Figure 12-1 shows the configuration of the 8-bit timers/counters. An 8-bit timer/counter consists of an 8-bit
count register, an 8-bit modulo register, a comparator that compares the value of the count register with that
of the modulo register, and a selector that selects the count pulse.
Cautions 1.
The modulo register is a write register.
The count register is a read register.
2.
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