20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 337

• 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

29.3 Rabbit Pin Descriptions
Table 29-3 lists all the pins on the Rabbit 4000 along with the data direction of the pin, its
function, and the pin number on the die.
Chapter 29 Package Specifications and Pinout
Hardware
CPU Buses
Status &
Control
Chip Selects
Output
Enables
Write
Enables
I/O Control
I/O Ports
Pin Group
CLK
CLK32K
/RESET
RESOUT
CLKI
CLKIEN
A[19:0]
D[7:0]
/WDTOUT
STATUS
SMODE1
SMODE0
/CS0
/CS1
/CS2
/OE0
/OE1
/WE0
/WE1
/BUFEN
/IORD
/IOWR
PA[7:0]
PB[7:0]
PC[7:0]
PD[7:0]
PE[7:0]
Pin Name
Table 29-3. Rabbit 4000 Pin Descriptions
Output
Input
Input
Output
Input
Output
Output
Bidirectional
Output
Output
Input
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Direction
Internal Clock Output
32 kHz Clock In
Master Reset
Reset Output
Main Clock In
Main Clock Enable
Address Bus
Data Bus
Watchdog Timer Timeout
Instruction Fetch First
Byte
Bootstrap Mode &
Tamper Detect
Memory Chip Select 0
Memory Chip Select 1
Memory Chip Select 2
Memory Output Enable 0
Memory Output Enable 1
Memory Write Enable
Memory Write Enable
I/O Buffer Enable
I/O Read Enable
I/O Write Enable
I/O Parallel Port A
I/O Parallel Port B
I/O Parallel Port C
I/O Parallel Port D
I/O Parallel Port E
Function
61–73, 66–70
52–57, 59–60
28–31, 34–37
LQFP Pin
112–119
various
various
99–106
42, 43
108
109
48
45
49
41
46
94
83
98
40
39
38
2
4
9
3
5
TFBGA Ball
various
various
various
various
various
various
various
M4, J5
B12
F12
M5
M3
B1
K6
C8
B8
C1
D3
B2
C2
D9
K4
L5
L6
L4
L3
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