参数资料
型号: MB90522BPMC1
厂商: FUJITSU LTD
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP120
封装: 14 X 14 MM, 1.70 MM HEIGHT, 0.40 MM PITCH, PLASTIC, LQFP-120
文件页数: 31/96页
文件大小: 2960K
代理商: MB90522BPMC1
MB90520B Series
DS07-13707-5E
45
5.
16-bit Reload Timers 0 and 1 (With Event Count Function)
The 16-bit reload timers have the following functions.
The count clock can be selected from three internal clock and the external event clock.
Either software trigger or external trigger can be selected as the start signals for 16-bit reload timers 0 and 1.
An interrupt to the CPU can be generated when an underflow occurs on 16-bit reload timer 0 and 1. This
interrupt allows the timers to be used as interval timers.
Two different operation modes can be selected when an underflow occurs on 16-bit reload timer 0 and 1 : one-
shot mode in which timer operation halts when an underflow occurs or reload mode in which the reload register
value is loaded into the timer and counting continues.
Extended intelligent I/O service (EI2OS) is supported.
The MB90520B series contains two 16-bit reload timer channels.
16-bit reload timer operation modes
Interval times for the 16-bit reload timers
Note : The values enclosed in ( ) and the example interval times are for a machine clock frequency of 16 MHz.
“T” is the machine cycle and is 1/ (machine clock frequency) .
Count Clock
Start Trigger
Operation when an Underflow Occurs
Internal clock
(3 clocks available)
Software trigger
One-shot mode
Reload mode
External trigger
One-shot mode
Reload mode
Event clock
Software trigger
One-shot mode
Reload mode
External trigger
One-shot mode
Reload mode
Count Clock
Count Clock Period
Example Interval Times
Internal clock
21T (0.125
s)
0.125
s to 8.192 ms
23T (0.5
s)
0.5
s to 32.768 ms
25T (2.0
s)
2.0
s to 131.1 ms
Event clock
23T or longer
0.5
s or longer
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