參數(shù)資料
型號: 101-0452
廠商: Rabbit Semiconductor
文件頁數(shù): 72/100頁
文件大?。?/td> 0K
描述: KIT DEV RABBIT RCM2100 INTL
標(biāo)準(zhǔn)包裝: 1
系列: RabbitCore 2000
主要目的: *
嵌入式: *
已用 IC / 零件: HYDRA
主要屬性: *
次要屬性: *
已供物品: HYDRA 裝置,存儲卡,空白試驗卡,鼠標(biāo),鍵盤,游戲鍵盤,視頻和 USB 線纜,電源和 CD 等
User’s Manual
67
A.4 I/O Buffer Sourcing and Sinking Limit
Unless otherwise specified, the Rabbit I/O buffers are capable of sourcing and sinking 8 mA of cur-
rent per pin at full AC switching speed. Full AC switching assumes a 22.1 MHz CPU clock and
capacitive loading on address and data lines of less than 100 pF per pin. Pins A0–A12 and D0–D7
are each rated at 8 mA. The absolute maximum operating voltage on all I/O is VDD + 0.5 V, or 5.5 V.
Table A-5 shows the AC and DC output drive limits of the parallel I/O buffers when the Rabbit 2000
is used in the RCM2100.
Table A-5. I/O Buffer Sourcing and Sinking Capability
Pin Name
Output Drive
Sourcing*/Sinking Limits
(mA)
* The maximum DC sourcing current for I/O buffers between VDD
pins is 112 mA.
The maximum DC sinking current for I/O buffers between VSS
pins is 150 mA.
Output Port Name
Full AC Switching
SRC/SNK
Maximum DC Output
Drive
SRC/SNK
The maximum DC output drive on I/O buffers must be adjusted to
take into consideration the current demands made my AC switch-
ing outputs, capacitive loading on switching outputs, and switching
voltage.
The current drawn by all switching and nonswitching I/O must
not exceed the limits specified in the first two footnotes.
PA [7:0]
8/8
12/12
PB [7, 1, 0]
8/8
12/12
PC [6, 4, 2, 0]
8/8
12/12
PD [7:4]
8/8
12/12
PD [3:0]**
** The combined sourcing from Port D [7:0] may need to be adjusted
so as not to exceed the 112 mA sourcing limit requirement speci-
fied in the first footnote.
16/16
25/25
PE [7:0]
8/8
12/12
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