20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 81
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
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
20-668-0011
Manufacturer:
Rabbit Semiconductor
Quantity:
10 000
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9.2.4 Interrupts
There are no interrupts associated with Parallel Port B.
9.3 Operation
The following steps must be taken before using Parallel Port B.
1. Select the desired input/output direction for each pin via PBDDR. Note that this setting
2. If the slave port or the external I/O bus is selected, refer to the chapters for those
Once the port is set up, data can be read or written by accessing PBDR. The value in
PBDR of an output pin will reflect its current output value, but any value written to an
input pin will not appear until that pin becomes an output.
9.4 Register Descriptions
Chapter 9 Parallel Port B
Bit(s)
Bit(s)
is superseded for some pins if the slave port or external I/O bus is enabled in SPCR or if
the clocked serial mode is enabled for Serial Ports A or B.
peripherals for further setup information.
Parallel Port B Data Direction Register
7:0
7:0
Parallel Port B Data Register
Value
Value
Write
Read
0
1
The current state of Parallel Port B pins PB7–PB0 is reported.
The Parallel Port B buffer is written with this value for transfer to the Parallel
Port B output register on the next rising edge of the peripheral clock.
The corresponding port bit is input.
The corresponding port bit is an output.
(PBDDR)
(PBDR)
Description
Description
(Address = 0x0040)
(Address = 0x0047)
71
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