cp3bt13 National Semiconductor Corporation, cp3bt13 Datasheet - Page 71

• Manufacturer Part Number: cp3bt13
• Description: Cp3bt13 Reprogrammable Connectivity Processor With Bluetooth-r And Can Interfaces
• Manufacturer: National Semiconductor Corporation

An example of a 32-bit write is shown in Table 32. In this ex-
ample, the 32-bit value FFFF DC04h is written to register
address 0Ah. In cycle 1, the high word (FFFFh) is written. In
the first part of cycle 2, the CP3BT13 drives the header, R/
W bit, and register address for a read cycle. In the second
part of cycle 2, the LMX5252 drives the counter value. The
Cycle
1
2
3
4
SCLK
SCLK
SDAT
SDAT
SLE
SLE
101 0 01010 1111111111111111
101 1 01010
101 0 01010 1101110000000100
101 1 01010
Serial Data on SDAT
H2
H2
H1
H1
H0
H0
0000000000000000
0000000000000001
W
R
A4
A4
Table 32 Example of 32-Bit Write with Interleaved Reads
A3
A3
A2
A2
A1
A1
A0
A0
D31
Figure 16. 32-Bit Write Timing
Figure 17. 32-Bit Read Timing
Write cycle driven by CP3BT13. Data is FFFFh. Address is 0Ah.
First part of read cycle driven by CP3BT13. Address is 0Ah.
Second part of read cycle driven by LMX5252. Counter value is 0.
Write cycle driven by CP3BT13. Data is DC04h. Address is 0Ah.
First part of read cycle driven by CP3BT13. Address is 0Ah.
Second part of read cycle driven by LMX5252. Counter value is 1.
D31
D30
D16
D16
>500 ns
>500 ns
71
counter value is 0, which indicates one word has been writ-
ten. In cycle 3, the low word (DC04h) is written. In the first
part of cycle 4, the CP3BT13 drives the header, R/W bit,
and register address for a read cycle. In the second part of
cycle 4, the LMX5252 drives the counter value. The counter
value is 1, which indicates two words have been written.
H2
H2
H1
H1
H0
H0
W
R
Description
A4
A4
A3
A3
A2
A2
A1
A1
A0
A0
D15
D15
D14
D0
D0
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DS322
DS323