3BHE019958R0101模塊，ABB卡件
MC68230并行接口定時器提供了多功能雙緩沖并行接口和面向操作系統(tǒng)的定時器MC68000系統(tǒng)-平行接口以非定向或BLD定向模式，非定向中的8位或16位wlde模式。reglster上的關(guān)聯(lián)數(shù)據(jù)d~rect~確定端口PM是bldlrectlonal模式下的輸入或輸出數(shù)據(jù)d~rectlon正則器被tgnored并確定方向通過四個握手PLN的狀態(tài)，這些可編程的握手PLN提供了足夠靈活的接口，可以連接到低-中的w~de varlety。
、
3BHE019958R0101模塊或高速外圍設(shè)備或其他計算機系統(tǒng)PIIT端口允許使用矢量或自動矢量中斷，并提供DMA請求pln，用于連接到MC68450 D ~ recr內(nèi)存訪問控制器或simtlar CLR連接Pl/Ttlrner包括一個24-b~t wlde計數(shù)器和一個5b1t預(yù)分頻器可以通過系統(tǒng)時鐘（PIIT CLK引腳）或外部時鐘（TIN pml，可使用5-b~r預(yù)分頻器，它可以生成per ~ od ~ c中斷方波，或pro的單中斷gramrned tlme perlod 11也可用于經(jīng)過的tlme測量或作為開發(fā)看門狗MC68003 Bds兼容0端口模式包括011 110Unld ~ Rectional 8-011和16 BltB~d~直線8-81！和16-0110個可選握手選項0 24-011可編程轉(zhuǎn)換器0軟件可編程Tmer模式0包含邏輯上的中斷向量生成0個單獨的端口和定時器中斷服務(wù)請求0 Reg ~ SRER是可讀的，可直接尋址為MOVEP lMove（外設(shè)）和DMAC尋址0個寄存器比較REAIRS上的b~l~VVMlC維修的產(chǎn)品在以下方面有缺陷保證：自裝運日期起九十（90）天內(nèi)的工藝和材料客戶要求維修所有超出保修期的電路板。參見標(biāo)準(zhǔn)保修期內(nèi)維修的電路板的銷售條件。6.4.7除外責(zé)任維修費用可能不適用于接收到異常信號的電路板物理或電氣損壞。在這種情況下，VMlC將提供估計價格用于電路板維修或更換。然后，客戶可以選擇讓董事會按估計價格維修，免費退回未維修，或按VMIC當(dāng)前標(biāo)價替換。
The MC68230 Parallel InterfaceITimer prov~des versatile double buffered parallel interfaces and an operating system oriented timer to
MC68000 systems The parallel tnterfaces operate in un~directional or
bldlrectional modes, either 8 or 16 bits wlde In the un~directlonal
modes. an assoctated data d~rect~on reglster determines whether the
port pms are Inputs or outputs In the bldlrectlonal modes the data
d~rectlon reglsrers are tgnored and the direction is determined
dynamcally by the state of four handshake plns These programmable
handshake plns prov~de an Interface flex~ble enough for connectlon to a
w~de varlety of low medium. or hlgh speed peripherals or other compurer systems The PIIT ports allow use of vectored or autovectored Interrupts and also prov~de a DMA Request pln for connectlon to the
MC68450 D~recr Memory Access Controller or a simtlar clrcult The Pl/T
tlrner contams a 24-b~t wlde counter and a 5b1t prescaler The tuner
may be clocked by the system clock (PIIT CLK pin) or by an external
clock (TIN pml, and a 5-b~r prescaler can be used It can generate
per~od~c Interrupts a square wave, or a slngle Interrupt af~er a pro
gramrned tlme perlod Also 11 can be used for elapsed tlme measurement or as a devlce watchdog
MC68003 Bds Compatible
0 Port Modes Include
011 110
Unld~rectonal 8-011 and 16-Blt
B~d~rect~onal 8-81! and 16-011
0 Selectable Handshakmg Opt~ons
0 24-011 Programmable Trner
0 Software Programmable Tmer Modes
0 Contains lnterrupt Vector Generat~on Logic
0 Separate Port and Timer Interrupt Serv~ce Requests
0 Reg~srers are ReadlWr~te and Directly Addressable
0 Reglsrers are Addressed for MOVEP lMove Peripheral) and DMAC
Compar~b~l~tyWarrantv on Re~airs
Products repaired by VMlC are warranted against defects in
workmanship and material for a period of ninety (90) days from date of shipment to
the customer for all boards that were repaired out of warranty. See standard
condition of sale for boards repaired within the warranty.
6.4.7 Exclusions
Repair rates may not apply to boards which have received unusual
physical or electrical damage. In such cases, VMlC will provide an estimated price
for board repair or replacement. The customer may then, at his option, choose to
have the board repaired at the estimated price, returned unrepaired at no charge,
or replaced at VMIC's current list price.
