668-0011 Rabbit Semiconductor, 668-0011 Datasheet - Page 77

• Manufacturer Part Number: 668-0011
• Description: IC MPU RABIT3000A 55.5MHZ128LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 668-0011

• Rohs Status: RoHS non-compliant
• 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
• Features: -
• Other names: 316-1043

8.4 Register Descriptions
Chapter 8 Parallel Port A
Bit(s)
Bit(s)
(Write
(Write
only)
only)
* Introduced with Rabbit 3000A chip.
7:0
6:5
3:2
1:0
7
4
Parallel Port A Data Register
Slave Port Control Register
Value
Value
Write
Write
Read
Read
00
01
10
11
00
01
10
11
0
1
0
1
The current state of Parallel Port A pins PA7–PA0 is reported.
The Parallel Port A buffer is written with this value for transfer to the Parallel
Port A output register on the next rising edge of the peripheral clock.
Program fetch as a function of the SMODE pins.
Ignore the SMODE pins program fetch function.
These bits report the state of the SMODE pins.
These bits are ignored and should be written with zero.
/SCS from PE7.
/SCS from PB6
Disable the slave port. Parallel Port A is a byte-wide input port.
Disable the slave port. Parallel Port A is a byte-wide output port.
Enable the slave port.
Enable the external I/O bus. Parallel Port A is used for the data bus and Parallel
Port B[7:2] is used for the address bus.
Slave port interrupts are disabled.
Slave port interrupts use Interrupt Priority 1.
Slave port interrupts use Interrupt Priority 2.
Slave port interrupts use Interrupt Priority 3.
*
.
(PADR)
(SPCR)
Description
Description
(Address = 0x0030)
(Address = 0x0024)
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