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參數(shù)資料
| 型號： | LS7566 |
| 廠商： | LSI Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | 24-BIT FOUR-AXES QUADRATURE COUNTER |
| 中文描述： | 24位的4軸正交計數(shù)器 |
| 文件頁數(shù)： | 4/13頁 |
| 文件大?。?/td> | 97K |
| 代理商： | LS7566 |
MDR0 (x0MDR0, x1MDR0, x2MD0, x3MDR0)
: The MDR0 is an 8-bit read/write register which configures the counting
modes and the index input functionality. Upon power-up, the MDR0 is cleared to zero.
MDR0: B7 B6 B5 B4 B3 B2 B1 B0
B1B0 = 00: Non-quadrature count mode (A = clock, B = direction).
= 01: x1 quadrature count mode (one count per quadrature cycle).
= 10: x2 quadrature count mode (two counts per quadrature cycle).
= 11: x4 quadrature count mode (four counts per quadrature cycle).
B3B2 = 00:
Free-running
count mode.
= 01:
Single-cycle
count mode (CNTR disabled with
carry
and
borrow
, re-enabled with
reset
or
load
)
= 10:
Range-limit
count mode (up and down count ranges are limited between PR and zero, respectively.
Counting freezes at these limits but resumes when the direction is reversed)
= 11:
Modulo-n
count mode (input count clock frequency is divided by a factor of [n+1], where n = PR. In
up direction, the CNTR is
cleared
to 0 at CNTR = PR and up count continues. In down direction, the
CNTR is
preset
to the value of PR at CNTR = 0 and down count continues. A mod-n rollover marker
pulse is generated at each limit at the FLGa output).
B5B4 = 00: Disable INDX input.
= 01: Configure INDX input as the load CNTR input (transfers PR to CNTR).
= 10: Configure INDX as the reset_CNTR input (clears CNTR to 0).
= 11: Configure INDX as the load_OL input (transfers CNTR to OL).
B6 = 0: Negative INDX input.
= 1: Positive INDX input.
B7 = 0: Input filter clock (PCK) division factor = 1. Filter clock frequency = f
PCK
.
= 1: Input filter clock division factor = 2. Filter clock frequency = f
PCK
/2.
MDR1 (x0MDR1, x1MDR1, x2MD1, x3MDR1)
: The MDR1 is an 8-bit read/write register which configures the FLGa and
FLGb output functionality. In addition, the MDR1 can be used to enable/disable counting. Upon power-up, the MDR1 is
cleared to zero:
MDR1: B7 B6 B5 B4 B3 B2 B1 B0
B0 = 1: Enable Carry on FLGa (flags CNTR overflow; latched or unlatched logic low on carry).
B1 = 1: Enable Borrow on FLGa (flags CNTR underflow, latched or unlatched logic low on borrow).
B2 = 1: Enable Compare on FLGa (In free-running count mode, a latched or unlatched logic low is generated in both
up and down count directions at CNTR = PR. In contrast, in range-limit and mod-n count modes a latched or
unlatched low is generated at CNTR = PR in the up-count direction only. Also, in these two modes in the
down-count direction, a latched or unlatched low is generated when the CNTR underflows. (See
NOTE 2
)
B3 = 1: Enable index on FLGa (flags index, latched or unlatched logic low when INDX input is at active level)
B5B4 = 00: FLGb disabled (fixed high)
= 01: FLGb =
Sign
, high for negative signifying CNTR underflow, low for positive.
= 10: FLGb =
Up/Down
count direction, high in count-up, low in count-down.
B6
= 0: Enable counting.
= 1: Disable counting.
B7
= 0: FLGa is latched. (See
NOTE 2
)
= 1: FLGa is non-latched and instantaneous.
NOTE 1
: Carry, Borrow, Compare and Index can all be simultaneously enabled on FLGa.
7566-032305-4
NOTE 2:
In mod-n or range-limit modes, if Compare output is enabled on FLGa,
instantaneous (non-latched) Compare signals are generated at PR = CNTR in up-count mode and
instantaneous Borrow signals are generated at CNTR = 0 in down-count mode, independent of the states of B7.
Carry and Borrow signals on FLGa remain unaffected in these two modes. Consequently, a latched Carry or Index state
willblock the instantaneous Compare and Borrow clocks. It is recommended that only non-latched Flag mode is used in
the mod-n and range-limit modes if carry and index signals are enablrd on FLGa as well in these two modes.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LS7566R | 制造商:LSI 制造商全稱:LSI 功能描述:24-BIT x 4-AXES QUADRATURE COUNTER |
| LS75C2D | 制造商:Citizen Finetech Miyota Co Ltd 功能描述:CITIZEN SWITCH a??LS75C2D-Ta?? |
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| LS75C4D-T | 功能描述:Tactile Switch SPST-NO Top Actuated Surface Mount 制造商:citizen 系列:LS75C 包裝:剪切帶（CT） 零件狀態(tài):有效 電路:SPST-NO 開關(guān)功能:關(guān)-瞬時 不同電壓時的觸頭額定電流:0.02A @ 12VDC 致動器類型:標(biāo)準(zhǔn) 安裝類型:表面貼裝 PCB 外致動器高度（從引腳計算）:0.50mm 致動器方向:頂部觸動 端子類型:SMD（SMT）接片 外形:2.80mm x 1.90mm 照明:不發(fā)光 照明電壓（標(biāo)稱值）:- 照明類型，顏色:- 作用力:240gf 侵入防護(hù):- 特性:- 致動器材料:- 開關(guān)行程:0.15mm 機(jī)械壽命:300，000 次循環(huán) 工作溫度:- 標(biāo)準(zhǔn)包裝:1 |
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