20-101-1139 Rabbit Semiconductor, 20-101-1139 Datasheet - Page 95

• Manufacturer Part Number: 20-101-1139
• Description: RCM4310 RABBITCORE
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-1139

• Module/board Type: MPU Core Module
• Product: Microcontroller Modules
• Data Bus Width: 8 bit
• Core Processor: Rabbit 4000
• Clock Speed: 58.98 MHz
• Interface Type: Ethernet
• Flash: 1 MByte
• Timers: 10 x 8 bit
• Operating Supply Voltage: 3.3 V
• Board Size: 72 mm x 47 mm x 21 mm
• For Use With/related Products: RCM4310
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1142

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
RCM4300. This section provides bus loading information for external devices.
Table A-5 lists the capacitance for the various RCM4300 I/O ports.
Table A-6 lists the external capacitive bus loading for the various RCM4300 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.
RabbitCore RCM4300 User’s Manual
Table A-6. External Capacitive Bus Loading -40°C to +85°C
Parallel Ports A to E
All I/O lines with clock
doubler enabled
Output Port
Table A-5. Capacitance of Rabbit 4000 I/O Ports
I/O Ports
Clock Speed
(MHz)
58.98
Capacitance
Input
(pF)
12
Capacitive Loading (pF)
Maximum External
Capacitance
100
Output
(pF)
14
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