cp3bt13 National Semiconductor Corporation, cp3bt13 Datasheet - Page 98

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

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16.10.5 Storage of Remote Messages
During remote frame transfer, the buffer registers DATA0–
DATA3 are “don’t cares”. If a remote frame is transmitted,
the contents of these registers are ignored. If a remote
SRR
IDE
RTR
ID
0E F0XCh
0E F0XEh
0E F0XAh
0E F0X8h
0E F0X6h
0E F0X4h
0E F0X2h
0E F0X0h
Address
The Substitute Remote Request bit replaces
the RTR bit used in standard frames at this bit
position. The SRR bit needs to be set by soft-
ware.
The Identifier Extension bit determines wheth-
er the message is a standard frame or an ex-
tended frame.
0 – Message is a standard frame using 11
1 – Message is an extended frame.
The Remote Transmission Request bit indi-
cates whether the message is a data frame or
a remote frame.
0 – Message is a data frame.
1 – Message is a remote frame.
The ID field is used to build the 29-bit identifier
of an extended frame. The ID[28:18] field is
used for the 11 standard frame identifier bits.
Register
CNSTAT
Buffer
DATA0
DATA1
DATA2
DATA3
TSTP
ID0
ID1
identifier bits.
15
14
DLC
13
Table 46 Extended Remote Frame
12
11
ID[28:18]
Reserved
10
98
frame is received, the contents of these registers will be
overwritten with invalid data. The structure of a message
buffer set up for a remote frame with extended identifier is
shown in Table 46.
9
ID[14:0]
Don’t Care
8
TSTP
7
6
PRI
5
SRR IDE
4
3
2
ST
ID17:15]
1
RTR
0