20-101-1215 Rabbit Semiconductor, 20-101-1215 Datasheet - Page 97

• Manufacturer Part Number: 20-101-1215
• Description: MCU RCM4050 RABBITCORE
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-1215

• Module/board Type: MPU Core Module
• For Use With/related Products: RCM4050
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1145

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
RCM4000. This section provides bus loading information for external devices.
Table A-5 lists the capacitance for the various RCM4000 I/O ports.
Table A-6 lists the external capacitive bus loading for the various RCM4000 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-7 lists the loadings for the A/D converter inputs.
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
Input Capacitance
Input Impedance
Parameter
Table A-7. A/D Converter Inputs
Clock Speed
(MHz)
58.98
Capacitance
Input
Common-Mode 6 M
(pF)
12
Differential 7 M
Capacitive Loading (pF)
4–9.7 pF
Value
Maximum External
Capacitance
100
Output
(pF)
14
91