20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 85

• Manufacturer Part Number: 20-668-0024
• Description: IC CPU RABBIT4000 128-LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0024

• Processor Type: Rabbit 4000 8-bit
• Speed: 60MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 20-668-0022; 316-1078

8.4 Register Descriptions
Chapter 8 Parallel Port A
Bit(s)
Bit(s)
7:0
6:5
4:2
1:0
7
Parallel Port A Data Register
Slave Port Control Register
Value
Value
Write
Read
write
read
000
001
010
100
101
011
110
111
00
01
10
11
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.
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, with /SCS from Parallel Port E bit 7.
Enable the auxiliary I/O bus. Parallel Port A is used for the data bus and Parallel
Port B[7:2] is used for the address bus.
This bit combination is reserved and should not be used.
This bit combination is reserved and should not be used.
Enable the slave port, with /SCS from Parallel Port B bit 6.
Enable the auxiliary I/O bus. Parallel Port A is used for the data bus and Parallel
Port B[7:0] 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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