參數(shù)資料
型號: PSB7110
廠商: SIEMENS AG
英文描述: Enhanced ISDN Data Access Controller ISAR
中文描述: 增強(qiáng)綜合業(yè)務(wù)數(shù)字網(wǎng)的數(shù)據(jù)接入控制器專家組
文件頁數(shù): 45/164頁
文件大小: 1173K
代理商: PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 45
3.1.5.2
Control Registers and Parameters
The most significant byte of the control register (CTRL MSB) contains configuration, status or control information
which depends on the type of message.
CTRL MSB
Config, Status or Control Information
CTRL LSB
1st Parameter
2nd Parameter
N-th Parameter
Number of Parameters N
Mailbox I/O Data
Mailbox I/O Data
Mailbox I/O Data
Figure 20 Control registers and parameters
The least significant byte of the control register (CTRL LSB) is used to indicate the number of bytes transfered via the
mailbox (Mailbox I/O Data). These mailbox data may contain additional configuration, status or control information as
well as receive/transmit data (figure 20).
Important note:
ISAR V1.1 (ROM version) will be software compatible to the ISAR V1.0 (download version), however it should be
noted that the length of some messages may differ in a way, that additional parameters may be provided.
The message parameters and their sequence within the message specified herein is identical, but a higher value of
the CTRL LSB may indicate that further parameters are provided through the mailbox.
For some of the messages no additional data is written to/read from the mailbox, in this case the CTRL LSB is set to
0.
The structure of the parameters is depending on the type of message being transfered and has no fixed format.
Therefore it is described with each individual message.
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