參數(shù)資料
型號(hào): 101-1158
廠商: Rabbit Semiconductor
文件頁(yè)數(shù): 90/112頁(yè)
文件大?。?/td> 0K
描述: KIT DEVELOPMENT INT'L RCM4100
標(biāo)準(zhǔn)包裝: 1
系列: RabbitCore 4000
類型: MPU 模塊
適用于相關(guān)產(chǎn)品: RCM4100
所含物品: RabbitCore 模塊、開(kāi)發(fā)板、交流適配器、纜線和 Dynamic C? 光盤
User’s Manual
75
A.3 I/O Buffer Sourcing and Sinking Limit
Unless otherwise specified, the Rabbit I/O buffers are capable of sourcing and sinking
8 mA of current per pin at full AC switching speed. Full AC switching assumes a
29.4 MHz CPU clock with the clock doubler enabled and capacitive loading on address
and data lines of less than 70 pF per pin. The absolute maximum operating voltage on all
I/O is 3.6 V.
A.4 Bus Loading
You must pay careful attention to bus loading when designing an interface to the
RCM4100 series of modules. This section provides bus loading information for external
devices.
Table A-5 lists the capacitance for the various RCM4100 I/O ports.
Table A-6 lists the external capacitive bus loading for the various RCM4100 series output
ports. Be sure to add the loads for the devices you are using in your custom system and
verify that they do not exceed the values in Table A-6.
Table A-5. Capacitance of Rabbit 4000 I/O Ports
I/O Ports
Input
Capacitance
(pF)
Output
Capacitance
(pF)
Parallel Ports A to E
12
14
Table A-6. External Capacitive Bus Loading -40°C to +85°C
Output Port
Clock Speed
(MHz)
Maximum External
Capacitive Loading (pF)
All I/O lines with clock
doubler enabled
58.98
100
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