參數資料
型號: MC68302PV33C
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP144
封裝: 20 X 20 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, PLASITC, LQFP-144
文件頁數: 11/128頁
文件大?。?/td> 641K
代理商: MC68302PV33C
MC68EN302 Electrical Characteristics
MOTOROLA
MC68EN302 REFERENCE MANUAL
8-9
8.6 OE, WEL, WEH TIMING
These are new signals added to the MC68EN302 that do not exist on the MC68302.
8.6.1 OE Timing
During a read, the timing on the OE signal is similar to the MC68302 UDS, LDS lines
(assertion and deassertion reference the same clock edges as UDS, LDS). Reference
Figure 6-2 (Read Cycle Timing Diagram) in the MC68302 User’s Manual. The following
MC68302 specifications define OE timing:
MC68302 Spec 9 - CLK0 High to OE Asserted
MC68302 Spec 12 - CLK0 Low to OE Negated
8.6.2 WEL, WEH Timing
During a write, the timing on the WEL, WEH signals is similar to the MC68302 UDS, LDS
lines (assertion and deassertion reference the same clock edges as UDS, LDS). Reference
Figure 6-3 (Write Cycle Timing Diagram) in the MC68302 User’s Manual. The following
MC68302 specifications define WEL, WEH timing:
MC68302 Spec 9 - CLK0 High to WEL, WEH Asserted
MC68302 Spec 12 - CLK0 Low to WEL, WEH Negated
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