20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 80
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
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
20-668-0011
Manufacturer:
Rabbit Semiconductor
Quantity:
10 000
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9.1.1 Block Diagram
9.1.2 Registers
9.2 Dependencies
9.2.1 I/O Pins
Parallel Port B uses pins PB0 through PB7. These pins can be used individually as data
inputs or outputs; as the address bits for the external I/O bus; as control signals for the
slave port; or as clocks for Serial Ports A and B.
On startup, bits 6 and 7 are outputs set low for backwards compatibility with the Rabbit
2000. All other pins are inputs.
Note that when the external I/O bus or slave port is enabled in SPCR, the Parallel Port B
pins associated with those peripherals perform those actions, no matter what the settings
are in PBDR or PBDDR. See the associated peripheral chapters for details on how they
use Parallel Port B.
9.2.2 Clocks
All outputs on Parallel Port B are clocked by the peripheral clock (perclk).
9.2.3 Other Registers
70
Port B Data Register
Port B Data Direction Register
SPCR
Register Name
Register
Sets the Parallel Port B function for some pins if the
slave port or external I/O bus is enabled.
Mnemonic
PBDDR
PBDR
Rabbit 3000 Microprocessor User’s Manual
Function
I/O Address
0x0040
0x0047
R/W
R/W
W
00xxxxxx
11000000
Reset
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