101-0399 Rabbit Semiconductor, 101-0399 Datasheet - Page 53

• Manufacturer Part Number: 101-0399
• Description: KIT DEV RABBIT RCM2000 INT'L
• Manufacturer: Rabbit Semiconductor
• Series: RabbitCore 2000r
• Type: MPU Moduler

Specifications of 101-0399

• Contents: RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
• For Use With/related Products: RCM2000, RCM2010, RCM2020
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 101-399; 101-399

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 current per pin at full AC switching speed. Full AC switching assumes a 25.8 MHz
CPU clock and capacitive loading on address and data lines of less than 100 pF per pin.
Address pin A0 and data pin D0 are rated at 16 mA each. Pins A1–A12 and D1–D7 are
each rated at 8 mA. The absolute maximum operating voltage on all I/O is V
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 RabbitCore 2000.
Some of the values listed are different from those listed in the Rabbit 2000 Microproces-
sor User’s Manual to take into account external loading of the Rabbit 2000 while it is part
of the RCM2000. Loads that exceed the values listed above need to be buffered.
User’s Manual
Output Port Name
PA [7:0]
PB [7, 1, 0]
PC [6, 4, 2, 0]
PD [7:4]
PD [3:0]
PE [7:0]
* The maximum DC sourcing current for I/O buffers between V
† The maximum DC sinking current for I/O buffers between V
‡ The maximum DC output drive on I/O buffers must be adjusted to take
** The combined sourcing from Port D [7:0] may need to be adjusted so as
The current drawn by all switching and nonswitching I/O must not
112 mA.
150 mA.
into consideration the current demands made my AC switching outputs,
capacitive loading on switching outputs, and switching voltage.
exceed the limits specified in the first two footnotes.
not to exceed the 112 mA sourcing limit requirement specified in the first
footnote.
Table A-5. I/O Buffer Sourcing and Sinking Capability
Pin Name
**
Full AC Switching
SRC/SNK
16/16
8/8
8/8
8/8
8/8
8/8
Sourcing
Output Drive
*
/Sinking
(mA)
Maximum
†
Limits
SRC/SNK
Drive
12/12
12/12
12/12
12/12
12/25
12/12
‡
SS
DD
DC Output
pins is
pins is
DD
+ 0.5 V, or
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