參數(shù)資料
型號(hào)： MB91340PMT
元件分類： 微控制器/微處理器
英文描述： 32-BIT, MROM, 66 MHz, RISC MICROCONTROLLER, PQFP176
封裝： PLASTIC, LQFP-176
文件頁(yè)數(shù)： 91/126頁(yè)
文件大?。?/td> 1501K
代理商： MB91340PMT
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MB91340/MB91V340
67
7.
8/16-Bit Up/Down Counter/Timer
The 8/16-bit up/down counter/timer consists of an six event inputs, two 8-bit up/down counters, two 8-bit reload/
compare registers, and their various control circuits.
The MB91340/MB91V340 have four 8-bit up/down counter/timer channels.
8-Bit Up/Down Counter/Timer Features
Note : Phase difference count mode is suitable for use as a motor or similar encorder counter. High precision
rotational position and speed counters can be implemented easily by inputting the A, B and Z phase outputs
from the encoder.
Parameter
Function
Operation mode
8-bit 2 channel modes
16-bit 1 channel mode
Count mode
Can select four different count modes.
Timer mode
Up/down count mode
Phase difference count mode (multiply by 2)
Phase difference count mode (multiply by 4)
Count clock (In timer mode)
Can select two different count modes.
φ/2 (φ : Machine clock frequency)
φ/8
Edge selection for detection
(In up/down count mode)
Can select which edge to detect on the external pin input signal.
Edge detection disabled
Detect falling edge
Detect rising edge
Detect both rising and falling edges
Function of ZIN pin
Can select two different functions.
Counter clear function
Gate function
Compare/reload function
Compare and reload functions are provided and these can be used individually or
together.
Compare function (Interrupt request generation and counter clear by compare
match )
Reload function (Interrupt request generation and reload by underflow)
Compare/reload function (Interrupt request generation and counter clear by
compare match, interrupt request generation and reload by underflow)
Compare/reload disabled
Count derection
The direction of the most recent count operation can be determined from the
count direction flag.
Interrupt request
Can generate interrupt request
Compare match
Underflow or overflow
Count direction change
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