3 rabbit pin descriptions – Jameco Electronics Rabbit 3000 User Manual
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Rabbit 3000 Microprocessor
5.3 Rabbit Pin Descriptions
Table 5-1 lists all the pins on the device, along with their direction, function, and pin num-
ber on the package.
Table 5-1. Rabbit Pin Descriptions
Pin Group
Pin Name
Direction
Function
Pin
Numbers
LQFP
Pin
Numbers
TFBGA
Hardware
CLK
Output
Internal Clock
2
B1
CLK32K
Input
32 kHz Oscillator In
49
L6
/RESET
Input
Master Reset
46
M5
RESOUT
Output
Reset Output
50
M6
XTALA1
Input
Main Oscillator In—if an
external clock is used, this
pin should be driven by
the external clock; see
Technical Note TN235 for
more information on
external oscillator circuits
113
B7
XTALA2
Output
Main Oscillator Out
114
A7
CPU Buses
ADDR[19:0]
Output
Address Bus
various
DATA[7:0]
Bidirectional
Data Bus
10–15, 18–
19
D4, E1–E4,
F1, F4, G0
Status/Control /WDTOUT
Output
WDT Time-Out
43
J5
STATUS
Output
Instruction Fetch First
Byte
4
C1
SMODE[1:0]
Input
Bootstrap Mode Select
44, 45
K5, L5
Memory Chip
Selects
/CS0
Output
Memory Chip Select 0
7
D1
/CS1
Output
Memory Chip Select 1
47
J6
/CS2
Output
Memory Chip Select 2
3
B2
Memory
Output
Enables
/OE0
Output
Memory Output Enable 0
5
C2
/OE1
Output
Memory Output Enable 1
95
C12
Memory
Write Enables
/WE0
Output
Memory Write Enable 0
86
F9
/WE1
Output
Memory Write Enable 1
99
B11
I/O Control
/BUFEN
Output
I/O Buffer Enable
42
M4
/IORD
Output
I/O Read Enable
41
L4
/IOWR
Output
I/O Write Enable
40
K4