20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 85
20-668-0011
Manufacturer Part Number
20-668-0011
Description
IC MPU RABIT3000A 55.5MHZ128LQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0011.pdf
(312 pages)
Specifications of 20-668-0011
Processor Type
Rabbit 3000 8-Bit
Speed
55.5MHz
Voltage
2.5V, 2.7V, 3V, 3.3V
Mounting Type
Surface Mount
Package / Case
128-LQFP
Data Bus Width
8 bit
Maximum Clock Frequency
55.5 MHz
Operating Supply Voltage
1.8 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 55 C
Number Of Programmable I/os
56
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
316-1061
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Part Number:
20-668-0011
Manufacturer:
Rabbit Semiconductor
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10.3 Operation
When PCDR is read, bits 1, 3, 5, and 7 return the logic level on the pin. Bits 0, 2, 4, and 6
return the value of the signal driving the output buffers. The signal driving the output buf-
fers and the value of the output pin are normally the same. The output pins are driven
either by PCDR or by one of the serial port transmit lines. The bits set in the PCFR iden-
tify whether the data register or the serial port transmit lines were driving the pins. When a
parallel port output pin is selected to be a serial port output, the value stored in PCDR is
ignored.
The data line inputs can be set up as asynchronous or clocked serial inputs via bits 4, 5,
and 6 of the corresponding Serial Port Control Registers (SxCR). When serving as serial
inputs, the data lines can still be read from PCDR.
On reset the active (even-numbered) function register bits are zeroed, causing Parallel Port C
to behave as an I/O port. Bit 6 of the Port C data register is zeroed while the remaining
even numbered bits are set to 1.
Chapter 10 Parallel Port C
75
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