參數(shù)資料
型號(hào): MC68HC05E6VDWR2
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: PLASTIC, SOIC-28
文件頁數(shù): 88/140頁
文件大?。?/td> 1141K
代理商: MC68HC05E6VDWR2
MC68HC05E6 — Rev. 1.0
MOTOROLA
Programmable Timer
51
Programmable Timer
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Keyboard/timer register (KEY/TIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Timer functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Timer during WAIT mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Timer during STOP mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Timer state diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
The programmable timer on the MC68HC05E6 consists of a 16-bit
read-only free-running counter, with a fixed divide-by-four prescaler,
plus the input capture/output compare circuitry. Selected input edges
cause the current counter value to be latched into a 16-bit input capture
register so that software can later read this value to determine when the
edge occurred. When the free running counter value matches the value
in the output compare registers, the programmed pin action takes place.
Refer to Figure 11 for a block diagram of the timer. The input capture and
output compare functions can only be enabled by setting bit 0 and bit 1
of the keyboard/timer register.
1-ptimer
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