668-0003-C Rabbit Semiconductor, 668-0003-C Datasheet - Page 115
![no-image](/images/no-image-200.jpg)
668-0003-C
Manufacturer Part Number
668-0003-C
Description
IC CPU RABBIT2000 30MHZ 100PQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0003.pdf
(228 pages)
Specifications of 668-0003-C
Rohs Status
RoHS non-compliant
Processor Type
Rabbit 2000 8-Bit
Speed
30MHz
Voltage
2.7V, 3V, 3.3V, 5V
Mounting Type
Surface Mount
Package / Case
100-MQFP, 100-PQFP
Features
-
Other names
316-1004
668-0003
668-0003
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
668-0003-C
Manufacturer:
Rabbit Semiconductor
Quantity:
10 000
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The pins of Port E can be set individually to be I/O strobes. Each of the eight possible I/O
strobes has a control register that controls the nature of the strobe and the number of wait
states that will be inserted in the I/O bus cycle. Writes can also be suppressed for any of
the strobes. The types of strobes are shown in Figure 10-1. Each of the eight I/O strobes is
active for addresses occupying 1/8th of the 64K external I/O address space.
Table 10-1 shows how the eight I/O bank control registers are organized.
Chapter 10 I/O Bank Control Registers
chip select strobe
Wait state code
11-1
10-3
01-7
00-15
* Total number of external I/O read/write wait states, including the one wait state
Bits 7,6
write data
write strobe
read data
read strobe
that is always present.
ADDR
10. I/O B
Table 10-1. I/O Bank Control Reg (adr IBxCR = 08xh)
*
/IX strobe type
00—chip select
01—read strobe
10—write strobe
11—or of read and
write strobe
Figure 10-1. External I/O Bus Cycles
Bits 5,4
ANK
T1
1—permit write
0—inhibit write
C
ONTROL
valid
Bit 3
Tw
valid
Ignored
T2
R
Bits 2–0
EGISTERS
valid
109
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